TY  - JOUR
AU  - Crnomarković, Nenad Đ.
AU  - Sijercic, Miroslav
AU  - Belošević, Srđan
AU  - Tucaković, Dragan R.
AU  - Živanović, Titoslav
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/118
AB  - The objective of the research was to find if an agreement of the results of a numerical investigation with experimental data could be achieved considering the two-phase medium in thermal equilibrium. Influence of the gray radiative properties on the radiative heat exchange inside pulverized lignite fired furnaces was investigated using the computational fluid dynamics (CFD) code based on a comprehensive mathematical model of the process. Radiative heat exchange was calculated using Hottels zonal model. Heat transfer rates and wall fluxes increased for small values of the total extinction coefficient, K-t LT 0.2 m(-1); decreased for large values of K-t, K-t GT 2.0 m(-1); and were maximal for moderate values of K-t, 0.2 LT K-t LT 2.0 m(-1). Heat transfer rates and wall fluxes decreased with the increase of the scattering albedo, though the decrease was considerable only for omega GT 0.5. Agreement with the experimental data was obtained for the moderate values of the K-t and for scattering albedo 0.1 LT omega LT 0.5. (C) 2014 Elsevier Masson SAS. All rights reserved.
T2  - International Journal of Thermal Sciences
T1  - Radiative heat exchange inside the pulverized lignite fired furnace for the gray radiative properties with thermal equilibrium between phases
VL  - 85
SP  - 21
EP  - 28
DO  - 10.1016/j.ijthermalsci.2014.06.014
ER  - 

@article{
author = "Crnomarković, Nenad Đ. and Sijercic, Miroslav and Belošević, Srđan and Tucaković, Dragan R. and Živanović, Titoslav",
year = "2014",
abstract = "The objective of the research was to find if an agreement of the results of a numerical investigation with experimental data could be achieved considering the two-phase medium in thermal equilibrium. Influence of the gray radiative properties on the radiative heat exchange inside pulverized lignite fired furnaces was investigated using the computational fluid dynamics (CFD) code based on a comprehensive mathematical model of the process. Radiative heat exchange was calculated using Hottels zonal model. Heat transfer rates and wall fluxes increased for small values of the total extinction coefficient, K-t LT 0.2 m(-1); decreased for large values of K-t, K-t GT 2.0 m(-1); and were maximal for moderate values of K-t, 0.2 LT K-t LT 2.0 m(-1). Heat transfer rates and wall fluxes decreased with the increase of the scattering albedo, though the decrease was considerable only for omega GT 0.5. Agreement with the experimental data was obtained for the moderate values of the K-t and for scattering albedo 0.1 LT omega LT 0.5. (C) 2014 Elsevier Masson SAS. All rights reserved.",
journal = "International Journal of Thermal Sciences",
title = "Radiative heat exchange inside the pulverized lignite fired furnace for the gray radiative properties with thermal equilibrium between phases",
volume = "85",
pages = "21-28",
doi = "10.1016/j.ijthermalsci.2014.06.014"
}

Crnomarković, N. Đ., Sijercic, M., Belošević, S., Tucaković, D. R.,& Živanović, T.. (2014). Radiative heat exchange inside the pulverized lignite fired furnace for the gray radiative properties with thermal equilibrium between phases. in International Journal of Thermal Sciences, 85, 21-28.
https://doi.org/10.1016/j.ijthermalsci.2014.06.014

Crnomarković NĐ, Sijercic M, Belošević S, Tucaković DR, Živanović T. Radiative heat exchange inside the pulverized lignite fired furnace for the gray radiative properties with thermal equilibrium between phases. in International Journal of Thermal Sciences. 2014;85:21-28.
doi:10.1016/j.ijthermalsci.2014.06.014 .

Crnomarković, Nenad Đ., Sijercic, Miroslav, Belošević, Srđan, Tucaković, Dragan R., Živanović, Titoslav, "Radiative heat exchange inside the pulverized lignite fired furnace for the gray radiative properties with thermal equilibrium between phases" in International Journal of Thermal Sciences, 85 (2014):21-28,
https://doi.org/10.1016/j.ijthermalsci.2014.06.014 . .

TY  - JOUR
AU  - Crnomarković, Nenad Đ.
AU  - Sijercic, Miroslav
AU  - Belošević, Srđan
AU  - Tucaković, Dragan R.
AU  - Živanović, Titoslav
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4364
AB  - Comparison of the numerical investigation results was carried out when the simple gray gas (SGG) and weighted sum of gray gases (WSGG) models are used to model the radiative properties of the gas phase inside the lignite fired furnaces. Comprehensive mathematical model of the tangentially fired furnace by pulverized lignite was made. Gas radiative properties were modeled by the SGG and WSGG models. Radiative heat transfer was modeled by the zonal model. Gas-phase variables and absorbed wall fluxes were compared on the basis of the relative differences that were determined for all control volumes and surface zones. Average relative differences of the gas-phase temperatures were about 1.0%. Average relative differences of the absorbed wall fluxes were from 2.0% to 5.0%. Absorbed wall fluxes determined by the SGG model were bigger than those determined by the WSGG model. Differences of the heat transfer rates of the absorbed radiation through the furnace walls were expressed in percents of heat transfer rates determined by the SGG model and were similar to the average relative differences of absorbed wall fluxes. Results justify application of the SGG model in comprehensive mathematical models of lignite-fired furnaces. (C) 2012 Elsevier Ltd. All rights reserved.
T2  - International Journal of Heat and Mass Transfer
T1  - Numerical investigation of processes in the lignite-fired furnace when simple gray gas and weighted sum of gray gases models are used
VL  - 56
IS  - 1-2
SP  - 197
EP  - 205
DO  - 10.1016/j.ijheatmasstransfer.2012.09.024
ER  - 

@article{
author = "Crnomarković, Nenad Đ. and Sijercic, Miroslav and Belošević, Srđan and Tucaković, Dragan R. and Živanović, Titoslav",
year = "2013",
abstract = "Comparison of the numerical investigation results was carried out when the simple gray gas (SGG) and weighted sum of gray gases (WSGG) models are used to model the radiative properties of the gas phase inside the lignite fired furnaces. Comprehensive mathematical model of the tangentially fired furnace by pulverized lignite was made. Gas radiative properties were modeled by the SGG and WSGG models. Radiative heat transfer was modeled by the zonal model. Gas-phase variables and absorbed wall fluxes were compared on the basis of the relative differences that were determined for all control volumes and surface zones. Average relative differences of the gas-phase temperatures were about 1.0%. Average relative differences of the absorbed wall fluxes were from 2.0% to 5.0%. Absorbed wall fluxes determined by the SGG model were bigger than those determined by the WSGG model. Differences of the heat transfer rates of the absorbed radiation through the furnace walls were expressed in percents of heat transfer rates determined by the SGG model and were similar to the average relative differences of absorbed wall fluxes. Results justify application of the SGG model in comprehensive mathematical models of lignite-fired furnaces. (C) 2012 Elsevier Ltd. All rights reserved.",
journal = "International Journal of Heat and Mass Transfer",
title = "Numerical investigation of processes in the lignite-fired furnace when simple gray gas and weighted sum of gray gases models are used",
volume = "56",
number = "1-2",
pages = "197-205",
doi = "10.1016/j.ijheatmasstransfer.2012.09.024"
}

Crnomarković, N. Đ., Sijercic, M., Belošević, S., Tucaković, D. R.,& Živanović, T.. (2013). Numerical investigation of processes in the lignite-fired furnace when simple gray gas and weighted sum of gray gases models are used. in International Journal of Heat and Mass Transfer, 56(1-2), 197-205.
https://doi.org/10.1016/j.ijheatmasstransfer.2012.09.024

Crnomarković NĐ, Sijercic M, Belošević S, Tucaković DR, Živanović T. Numerical investigation of processes in the lignite-fired furnace when simple gray gas and weighted sum of gray gases models are used. in International Journal of Heat and Mass Transfer. 2013;56(1-2):197-205.
doi:10.1016/j.ijheatmasstransfer.2012.09.024 .

Crnomarković, Nenad Đ., Sijercic, Miroslav, Belošević, Srđan, Tucaković, Dragan R., Živanović, Titoslav, "Numerical investigation of processes in the lignite-fired furnace when simple gray gas and weighted sum of gray gases models are used" in International Journal of Heat and Mass Transfer, 56, no. 1-2 (2013):197-205,
https://doi.org/10.1016/j.ijheatmasstransfer.2012.09.024 . .

TY  - JOUR
AU  - Crnomarković, Nenad Đ.
AU  - Sijercic, Miroslav
AU  - Belošević, Srđan
AU  - Stanković, Branislav D.
AU  - Tucaković, Dragan R.
AU  - Živanović, Titoslav
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5053
AB  - A possibility of simplification of the scattering phase function of a pulverized coal flame was analyzed in the paper. It was showed that the type of radiation scattering of a pulverized coal flame is between two limiting cases: isotropic and forward scattering. A comprehensive mathematical model of a tangentially fired furnace by pulverized coal was formed. Radiative heat transfer was modeled using the six-flux model. Grid independent results of the numerical simulations were obtained. The mathematical model was verified by comparison of the results of numerical simulations with results of measurements. The influence of the type of radiation scattering on results of numerical simulation was analyzed through the relative and average differences of the gas-phase temperatures, the total radiation fluxes, and the absorbed wall fluxes of the left furnace wall. The investigation showed that the total radiation fluxes were considerably influenced by the type of radiation scattering. On the other hand, the gas-phase temperatures and the absorbed wall fluxes were much less influenced by the type of radiation scattering. The results justify the use of the scattering phase function corresponding to isotropic scattering in radiation models of comprehensive mathematical models of pulverized coal fired furnaces. (C) 2012 Elsevier Ltd. All rights reserved.
T2  - Energy
T1  - Influence of forward scattering on prediction of temperature and radiation fields inside the pulverized coal furnace
VL  - 45
IS  - 1
SP  - 160
EP  - 168
DO  - 10.1016/j.energy.2012.01.019
ER  - 

@article{
author = "Crnomarković, Nenad Đ. and Sijercic, Miroslav and Belošević, Srđan and Stanković, Branislav D. and Tucaković, Dragan R. and Živanović, Titoslav",
year = "2012",
abstract = "A possibility of simplification of the scattering phase function of a pulverized coal flame was analyzed in the paper. It was showed that the type of radiation scattering of a pulverized coal flame is between two limiting cases: isotropic and forward scattering. A comprehensive mathematical model of a tangentially fired furnace by pulverized coal was formed. Radiative heat transfer was modeled using the six-flux model. Grid independent results of the numerical simulations were obtained. The mathematical model was verified by comparison of the results of numerical simulations with results of measurements. The influence of the type of radiation scattering on results of numerical simulation was analyzed through the relative and average differences of the gas-phase temperatures, the total radiation fluxes, and the absorbed wall fluxes of the left furnace wall. The investigation showed that the total radiation fluxes were considerably influenced by the type of radiation scattering. On the other hand, the gas-phase temperatures and the absorbed wall fluxes were much less influenced by the type of radiation scattering. The results justify the use of the scattering phase function corresponding to isotropic scattering in radiation models of comprehensive mathematical models of pulverized coal fired furnaces. (C) 2012 Elsevier Ltd. All rights reserved.",
journal = "Energy",
title = "Influence of forward scattering on prediction of temperature and radiation fields inside the pulverized coal furnace",
volume = "45",
number = "1",
pages = "160-168",
doi = "10.1016/j.energy.2012.01.019"
}

Crnomarković, N. Đ., Sijercic, M., Belošević, S., Stanković, B. D., Tucaković, D. R.,& Živanović, T.. (2012). Influence of forward scattering on prediction of temperature and radiation fields inside the pulverized coal furnace. in Energy, 45(1), 160-168.
https://doi.org/10.1016/j.energy.2012.01.019

Crnomarković NĐ, Sijercic M, Belošević S, Stanković BD, Tucaković DR, Živanović T. Influence of forward scattering on prediction of temperature and radiation fields inside the pulverized coal furnace. in Energy. 2012;45(1):160-168.
doi:10.1016/j.energy.2012.01.019 .

Crnomarković, Nenad Đ., Sijercic, Miroslav, Belošević, Srđan, Stanković, Branislav D., Tucaković, Dragan R., Živanović, Titoslav, "Influence of forward scattering on prediction of temperature and radiation fields inside the pulverized coal furnace" in Energy, 45, no. 1 (2012):160-168,
https://doi.org/10.1016/j.energy.2012.01.019 . .

TY  - JOUR
AU  - Belošević, Srđan
AU  - Sijercic, Miroslav
AU  - Crnomarković, Nenad Đ.
AU  - Stanković, Branislav D.
AU  - Tucaković, Dragan R.
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3849
AB  - In optimization of a utility boiler furnace operation, special attention is given to the flame geometry and position. As an illustration of possibilities for application of mathematical prediction and numerical experiment in efficient optimization of the flame, the paper presents selected results of simulations of processes in pulverized coal tangentially Fired furnace of Kostolac-B 350 MW electric boiler unit, To analyze the furnace working under different conditions, a differential 3D mathematical model of two-phase turbulent reactive flow with heat and mass transfer and corresponding computer code have been developed. Using the model and the code, previously carefully verified and validated against field measurements, an extensive numerical study has been performed to investigate the dependence of the furnace flame characteristics oil different operating conditions, including distribution of the coal, air flow rates, and particle size classes over the burner tiers, as well as the quality and grinding fineness of coal and the operation scheme of the coal mills. The numerical predictions of the flame characteristics enable a specific tool for optimization of the boiler unit with respect to efficiency and ecology.
T2  - Energy and Fuels
T1  - Numerical Prediction of Pulverized Coal Flame in Utility Boiler Furnaces
VL  - 23
IS  - 11
SP  - 5401
EP  - 5412
DO  - 10.1021/ef9005737
ER  - 

@article{
author = "Belošević, Srđan and Sijercic, Miroslav and Crnomarković, Nenad Đ. and Stanković, Branislav D. and Tucaković, Dragan R.",
year = "2009",
abstract = "In optimization of a utility boiler furnace operation, special attention is given to the flame geometry and position. As an illustration of possibilities for application of mathematical prediction and numerical experiment in efficient optimization of the flame, the paper presents selected results of simulations of processes in pulverized coal tangentially Fired furnace of Kostolac-B 350 MW electric boiler unit, To analyze the furnace working under different conditions, a differential 3D mathematical model of two-phase turbulent reactive flow with heat and mass transfer and corresponding computer code have been developed. Using the model and the code, previously carefully verified and validated against field measurements, an extensive numerical study has been performed to investigate the dependence of the furnace flame characteristics oil different operating conditions, including distribution of the coal, air flow rates, and particle size classes over the burner tiers, as well as the quality and grinding fineness of coal and the operation scheme of the coal mills. The numerical predictions of the flame characteristics enable a specific tool for optimization of the boiler unit with respect to efficiency and ecology.",
journal = "Energy and Fuels",
title = "Numerical Prediction of Pulverized Coal Flame in Utility Boiler Furnaces",
volume = "23",
number = "11",
pages = "5401-5412",
doi = "10.1021/ef9005737"
}

Belošević, S., Sijercic, M., Crnomarković, N. Đ., Stanković, B. D.,& Tucaković, D. R.. (2009). Numerical Prediction of Pulverized Coal Flame in Utility Boiler Furnaces. in Energy and Fuels, 23(11), 5401-5412.
https://doi.org/10.1021/ef9005737

Belošević S, Sijercic M, Crnomarković NĐ, Stanković BD, Tucaković DR. Numerical Prediction of Pulverized Coal Flame in Utility Boiler Furnaces. in Energy and Fuels. 2009;23(11):5401-5412.
doi:10.1021/ef9005737 .

Belošević, Srđan, Sijercic, Miroslav, Crnomarković, Nenad Đ., Stanković, Branislav D., Tucaković, Dragan R., "Numerical Prediction of Pulverized Coal Flame in Utility Boiler Furnaces" in Energy and Fuels, 23, no. 11 (2009):5401-5412,
https://doi.org/10.1021/ef9005737 . .

TY  - JOUR
AU  - Belošević, Srđan
AU  - Sijercic, Miroslav
AU  - Stefanović, Predrag Lj.
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3403
AB  - Paper presents selected results of numerical simulation of processes in air-coal dust mixture duct of pulverized coal utility boiler furnace with plasma-system for pulverized coal ignition and combustion stabilization. Application of the system in utility boiler furnaces promises to achieve important savings compared with the use of heavy oil burners. Plasma torches are built in air-coal dust mixture ducts between coal mills and burners. Calculations have been performed for one of rectangular air-coal dust mixture ducts with two opposite plasma torches, used in 210 MWe utility boiler firing pulverized Serbian lignite. The simulations are based on a three-dimensional mathematical model of mass, momentum and heat transfer in reacting turbulent gas-particle flow, specially developed for the purpose. Characteristics of processes in the duct are analyzed in the paper, with respect to the numerical results. The plasma-system thermal effect is discussed as well, regarding corresponding savings of liquid fuel. It has been emphasized that numerical simulation of the processes can be applied in optimization of pulverized coal ignition and combustion stabilization and enables efficient and cost-effective scaling-up procedure from laboratory to industrial scale. (C) 2007 Elsevier Ltd. All rights reserved.
T2  - International Journal of Heat and Mass Transfer
T1  - A numerical study of pulverized coal ignition by means of plasma torches in air-coal dust mixture ducts of utility boiler furnaces
VL  - 51
IS  - 7-8
SP  - 1970
EP  - 1978
DO  - 10.1016/j.ijheatmasstransfer.2007.06.003
ER  - 

@article{
author = "Belošević, Srđan and Sijercic, Miroslav and Stefanović, Predrag Lj.",
year = "2008",
abstract = "Paper presents selected results of numerical simulation of processes in air-coal dust mixture duct of pulverized coal utility boiler furnace with plasma-system for pulverized coal ignition and combustion stabilization. Application of the system in utility boiler furnaces promises to achieve important savings compared with the use of heavy oil burners. Plasma torches are built in air-coal dust mixture ducts between coal mills and burners. Calculations have been performed for one of rectangular air-coal dust mixture ducts with two opposite plasma torches, used in 210 MWe utility boiler firing pulverized Serbian lignite. The simulations are based on a three-dimensional mathematical model of mass, momentum and heat transfer in reacting turbulent gas-particle flow, specially developed for the purpose. Characteristics of processes in the duct are analyzed in the paper, with respect to the numerical results. The plasma-system thermal effect is discussed as well, regarding corresponding savings of liquid fuel. It has been emphasized that numerical simulation of the processes can be applied in optimization of pulverized coal ignition and combustion stabilization and enables efficient and cost-effective scaling-up procedure from laboratory to industrial scale. (C) 2007 Elsevier Ltd. All rights reserved.",
journal = "International Journal of Heat and Mass Transfer",
title = "A numerical study of pulverized coal ignition by means of plasma torches in air-coal dust mixture ducts of utility boiler furnaces",
volume = "51",
number = "7-8",
pages = "1970-1978",
doi = "10.1016/j.ijheatmasstransfer.2007.06.003"
}

Belošević, S., Sijercic, M.,& Stefanović, P. Lj.. (2008). A numerical study of pulverized coal ignition by means of plasma torches in air-coal dust mixture ducts of utility boiler furnaces. in International Journal of Heat and Mass Transfer, 51(7-8), 1970-1978.
https://doi.org/10.1016/j.ijheatmasstransfer.2007.06.003

Belošević S, Sijercic M, Stefanović PL. A numerical study of pulverized coal ignition by means of plasma torches in air-coal dust mixture ducts of utility boiler furnaces. in International Journal of Heat and Mass Transfer. 2008;51(7-8):1970-1978.
doi:10.1016/j.ijheatmasstransfer.2007.06.003 .

Belošević, Srđan, Sijercic, Miroslav, Stefanović, Predrag Lj., "A numerical study of pulverized coal ignition by means of plasma torches in air-coal dust mixture ducts of utility boiler furnaces" in International Journal of Heat and Mass Transfer, 51, no. 7-8 (2008):1970-1978,
https://doi.org/10.1016/j.ijheatmasstransfer.2007.06.003 . .

TY  - JOUR
AU  - Belošević, Srđan
AU  - Sijercic, Miroslav
AU  - Tucaković, Dragan R.
AU  - Crnomarković, Nenad Đ.
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3513
AB  - For prediction of complex processes in two-phase turbulent reactive flows within large-scale boiler furnaces firing pulverized coal, a comprehensive 3D differential mathematical model and CFD computer code have been developed in-house. The model incorporates trade-offs between submodels sophistication and computational practicality. An easy-to-use interface for introducing input data and grid generation has been build within the code. The main purpose of the paper is to present numerical predictions of processes in the case-study furnace under different operating conditions, obtained by the developed model. The paper also provides information on characteristics and evaluation of the model, with a grid refinement study and comparisons with comprehensive data. The effects of different operating conditions on the processes in the case-study furnace are correctly predicted, demonstrating the ability of the developed model to perform parametric studies. (c) 2008 Elsevier Ltd. All rights reserved.
T2  - Fuel
T1  - A numerical study of a utility boiler tangentially-fired furnace under different operating conditions
VL  - 87
IS  - 15-16
SP  - 3331
EP  - 3338
DO  - 10.1016/j.fuel.2008.05.014
ER  - 

@article{
author = "Belošević, Srđan and Sijercic, Miroslav and Tucaković, Dragan R. and Crnomarković, Nenad Đ.",
year = "2008",
abstract = "For prediction of complex processes in two-phase turbulent reactive flows within large-scale boiler furnaces firing pulverized coal, a comprehensive 3D differential mathematical model and CFD computer code have been developed in-house. The model incorporates trade-offs between submodels sophistication and computational practicality. An easy-to-use interface for introducing input data and grid generation has been build within the code. The main purpose of the paper is to present numerical predictions of processes in the case-study furnace under different operating conditions, obtained by the developed model. The paper also provides information on characteristics and evaluation of the model, with a grid refinement study and comparisons with comprehensive data. The effects of different operating conditions on the processes in the case-study furnace are correctly predicted, demonstrating the ability of the developed model to perform parametric studies. (c) 2008 Elsevier Ltd. All rights reserved.",
journal = "Fuel",
title = "A numerical study of a utility boiler tangentially-fired furnace under different operating conditions",
volume = "87",
number = "15-16",
pages = "3331-3338",
doi = "10.1016/j.fuel.2008.05.014"
}

Belošević, S., Sijercic, M., Tucaković, D. R.,& Crnomarković, N. Đ.. (2008). A numerical study of a utility boiler tangentially-fired furnace under different operating conditions. in Fuel, 87(15-16), 3331-3338.
https://doi.org/10.1016/j.fuel.2008.05.014

Belošević S, Sijercic M, Tucaković DR, Crnomarković NĐ. A numerical study of a utility boiler tangentially-fired furnace under different operating conditions. in Fuel. 2008;87(15-16):3331-3338.
doi:10.1016/j.fuel.2008.05.014 .

Belošević, Srđan, Sijercic, Miroslav, Tucaković, Dragan R., Crnomarković, Nenad Đ., "A numerical study of a utility boiler tangentially-fired furnace under different operating conditions" in Fuel, 87, no. 15-16 (2008):3331-3338,
https://doi.org/10.1016/j.fuel.2008.05.014 . .

TY  - JOUR
AU  - Sijercic, Miroslav
AU  - Belošević, Srđan
AU  - Stevanović, Žarko M.
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3165
AB  - Free two-phase flows occur in many practical applications, such as sprays or particle drying and combustion. This paper deals with mathematical modelling of a free turbulent two-phase jet. A steady, axisymmetric, dilute, monodisperse, particle-laden, turbulent jet injected into a still environment, has been considered. The model treats the gas-phase from an Eulerian standpoint and the motion of particles from a Lagrangian one. Closure of the system of time averaged transport equations has been accomplished by using a Reynolds-stress turbulence model. The particles-fluid interaction has been considered by the PSI-Cell concept. Both the effect of interphase slip and the effect of particle dispersion have been taken into account. Results of the model have been compared with experimental data for axial and radial profiles of gas-phase mean and turbulent quantities and solid-phase mean velocity. Accuracy of model predictions of particle-laden free jet time averaged characteristics as well as turbulence correlation coefficients have been improved. The modelling of observed turbulence anisotropy levels and correlation coefficients need to be carried out with special care. The model has provided insight into the turbulence structure and aerodynamic characteristics of the particle-laden free jet. A brief sensitivity study has been performed as well, indicating that the specification of inlet boundary conditions exerts pronounced effects on predictions. In this paper, the study refers to the effect of the turbulence kinetic energy dissipation rate, while the other inlet boundary conditions have been applied with respect to the referent measurements. (c) 2006 Elsevier Inc. All rights reserved.
T2  - Applied Mathematical Modelling
T1  - Simulation of free turbulent particle-laden jet using Reynolds-stress gas turbulence model
VL  - 31
IS  - 6
SP  - 1001
EP  - 1014
DO  - 10.1016/j.apm.2006.03.019
ER  - 

@article{
author = "Sijercic, Miroslav and Belošević, Srđan and Stevanović, Žarko M.",
year = "2007",
abstract = "Free two-phase flows occur in many practical applications, such as sprays or particle drying and combustion. This paper deals with mathematical modelling of a free turbulent two-phase jet. A steady, axisymmetric, dilute, monodisperse, particle-laden, turbulent jet injected into a still environment, has been considered. The model treats the gas-phase from an Eulerian standpoint and the motion of particles from a Lagrangian one. Closure of the system of time averaged transport equations has been accomplished by using a Reynolds-stress turbulence model. The particles-fluid interaction has been considered by the PSI-Cell concept. Both the effect of interphase slip and the effect of particle dispersion have been taken into account. Results of the model have been compared with experimental data for axial and radial profiles of gas-phase mean and turbulent quantities and solid-phase mean velocity. Accuracy of model predictions of particle-laden free jet time averaged characteristics as well as turbulence correlation coefficients have been improved. The modelling of observed turbulence anisotropy levels and correlation coefficients need to be carried out with special care. The model has provided insight into the turbulence structure and aerodynamic characteristics of the particle-laden free jet. A brief sensitivity study has been performed as well, indicating that the specification of inlet boundary conditions exerts pronounced effects on predictions. In this paper, the study refers to the effect of the turbulence kinetic energy dissipation rate, while the other inlet boundary conditions have been applied with respect to the referent measurements. (c) 2006 Elsevier Inc. All rights reserved.",
journal = "Applied Mathematical Modelling",
title = "Simulation of free turbulent particle-laden jet using Reynolds-stress gas turbulence model",
volume = "31",
number = "6",
pages = "1001-1014",
doi = "10.1016/j.apm.2006.03.019"
}

Sijercic, M., Belošević, S.,& Stevanović, Ž. M.. (2007). Simulation of free turbulent particle-laden jet using Reynolds-stress gas turbulence model. in Applied Mathematical Modelling, 31(6), 1001-1014.
https://doi.org/10.1016/j.apm.2006.03.019

Sijercic M, Belošević S, Stevanović ŽM. Simulation of free turbulent particle-laden jet using Reynolds-stress gas turbulence model. in Applied Mathematical Modelling. 2007;31(6):1001-1014.
doi:10.1016/j.apm.2006.03.019 .

Sijercic, Miroslav, Belošević, Srđan, Stevanović, Žarko M., "Simulation of free turbulent particle-laden jet using Reynolds-stress gas turbulence model" in Applied Mathematical Modelling, 31, no. 6 (2007):1001-1014,
https://doi.org/10.1016/j.apm.2006.03.019 . .

TY  - JOUR
AU  - Bakić, Vukman
AU  - Nemoda, Stevan
AU  - Sijercic, Miroslav
AU  - Turanjanin, Valentina
AU  - Stanković, Branislav D.
PY  - 2006
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3069
AB  - In this paper, the mean velocity, turbulence intensity and temperature profiles in different cross-sections of premixed acetylene flame are given. A mathematical model for prediction of velocity, temperature and concentration fields of axisymmetric free premixed turbulent flame is presented in this paper. A second-order closure for turbulent reacting flows is used. Special attentions is paid to model behavior with the respect to the prediction correlation coefficients of turbulent diffusion of the scalar components. Conditional and unconditional statistics of the LDA signals were performed using jet and/or air seed. Compared to commonly used unconditional statistics, conditional statistics of velocity fluctuations can give us more data about intensity of turbulent mixing in the flame. (c) 2006 Elsevier Ltd. All rights reserved.
T2  - International Journal of Heat and Mass Transfer
T1  - Experimental and numerical investigation of premixed acetylene flame
VL  - 49
IS  - 21-22
SP  - 4023
EP  - 4032
DO  - 10.1016/j.ijheatmasstransfer.2006.04.008
ER  - 

@article{
author = "Bakić, Vukman and Nemoda, Stevan and Sijercic, Miroslav and Turanjanin, Valentina and Stanković, Branislav D.",
year = "2006",
abstract = "In this paper, the mean velocity, turbulence intensity and temperature profiles in different cross-sections of premixed acetylene flame are given. A mathematical model for prediction of velocity, temperature and concentration fields of axisymmetric free premixed turbulent flame is presented in this paper. A second-order closure for turbulent reacting flows is used. Special attentions is paid to model behavior with the respect to the prediction correlation coefficients of turbulent diffusion of the scalar components. Conditional and unconditional statistics of the LDA signals were performed using jet and/or air seed. Compared to commonly used unconditional statistics, conditional statistics of velocity fluctuations can give us more data about intensity of turbulent mixing in the flame. (c) 2006 Elsevier Ltd. All rights reserved.",
journal = "International Journal of Heat and Mass Transfer",
title = "Experimental and numerical investigation of premixed acetylene flame",
volume = "49",
number = "21-22",
pages = "4023-4032",
doi = "10.1016/j.ijheatmasstransfer.2006.04.008"
}

Bakić, V., Nemoda, S., Sijercic, M., Turanjanin, V.,& Stanković, B. D.. (2006). Experimental and numerical investigation of premixed acetylene flame. in International Journal of Heat and Mass Transfer, 49(21-22), 4023-4032.
https://doi.org/10.1016/j.ijheatmasstransfer.2006.04.008

Bakić V, Nemoda S, Sijercic M, Turanjanin V, Stanković BD. Experimental and numerical investigation of premixed acetylene flame. in International Journal of Heat and Mass Transfer. 2006;49(21-22):4023-4032.
doi:10.1016/j.ijheatmasstransfer.2006.04.008 .

Bakić, Vukman, Nemoda, Stevan, Sijercic, Miroslav, Turanjanin, Valentina, Stanković, Branislav D., "Experimental and numerical investigation of premixed acetylene flame" in International Journal of Heat and Mass Transfer, 49, no. 21-22 (2006):4023-4032,
https://doi.org/10.1016/j.ijheatmasstransfer.2006.04.008 . .

TY  - JOUR
AU  - Belošević, Srđan
AU  - Sijercic, Miroslav
AU  - Oka, Simeon N.
AU  - Tucaković, Dragan R.
PY  - 2006
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3051
AB  - This paper presents selected results of numerical simulations of processes in utility boiler pulverized coal tangentially fired dry-bottom furnace. The simulations have been performed by specially developed comprehensive mathematical model. The main features of the model are a three-dimensional geometry, k-epsilon gas turbulence model, Eulerian-Lagrangian approach, particles-to-turbulence interaction, diffusion model of particle dispersion, six-flux method for radiation modeling and pulverized coal combustion model based on the global particle kinetics and experimentally obtained kinetic parameters. Five operation regimes of 210 MW, boiler furnace burning Serbian lignites, with different grinding fineness of coal and coal quality, have been simulated. The model successfully predicts the influence of the parameters on the furnace processes and operation characteristics (like the flue gas temperature and the furnace walls radiation fluxes). The predicted flame temperature and percentage combustibles in bottom ash are in good agreement with the measurements. The developed model can find different applications, both in research and practice. (c) 2006 Elsevier Ltd. All rights reserved.
T2  - International Journal of Heat and Mass Transfer
T1  - Three-dimensional modeling of utility boiler pulverized coal tangentially fired furnace
VL  - 49
IS  - 19-20
SP  - 3371
EP  - 3378
DO  - 10.1016/j.ijheatmasstransfer.2006.03.022
ER  - 

@article{
author = "Belošević, Srđan and Sijercic, Miroslav and Oka, Simeon N. and Tucaković, Dragan R.",
year = "2006",
abstract = "This paper presents selected results of numerical simulations of processes in utility boiler pulverized coal tangentially fired dry-bottom furnace. The simulations have been performed by specially developed comprehensive mathematical model. The main features of the model are a three-dimensional geometry, k-epsilon gas turbulence model, Eulerian-Lagrangian approach, particles-to-turbulence interaction, diffusion model of particle dispersion, six-flux method for radiation modeling and pulverized coal combustion model based on the global particle kinetics and experimentally obtained kinetic parameters. Five operation regimes of 210 MW, boiler furnace burning Serbian lignites, with different grinding fineness of coal and coal quality, have been simulated. The model successfully predicts the influence of the parameters on the furnace processes and operation characteristics (like the flue gas temperature and the furnace walls radiation fluxes). The predicted flame temperature and percentage combustibles in bottom ash are in good agreement with the measurements. The developed model can find different applications, both in research and practice. (c) 2006 Elsevier Ltd. All rights reserved.",
journal = "International Journal of Heat and Mass Transfer",
title = "Three-dimensional modeling of utility boiler pulverized coal tangentially fired furnace",
volume = "49",
number = "19-20",
pages = "3371-3378",
doi = "10.1016/j.ijheatmasstransfer.2006.03.022"
}

Belošević, S., Sijercic, M., Oka, S. N.,& Tucaković, D. R.. (2006). Three-dimensional modeling of utility boiler pulverized coal tangentially fired furnace. in International Journal of Heat and Mass Transfer, 49(19-20), 3371-3378.
https://doi.org/10.1016/j.ijheatmasstransfer.2006.03.022

Belošević S, Sijercic M, Oka SN, Tucaković DR. Three-dimensional modeling of utility boiler pulverized coal tangentially fired furnace. in International Journal of Heat and Mass Transfer. 2006;49(19-20):3371-3378.
doi:10.1016/j.ijheatmasstransfer.2006.03.022 .

Belošević, Srđan, Sijercic, Miroslav, Oka, Simeon N., Tucaković, Dragan R., "Three-dimensional modeling of utility boiler pulverized coal tangentially fired furnace" in International Journal of Heat and Mass Transfer, 49, no. 19-20 (2006):3371-3378,
https://doi.org/10.1016/j.ijheatmasstransfer.2006.03.022 . .