New non-orthogonality treatment for atmospheric boundary layer flow simulation above highly non-uniform terrains
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In this paper we validate an improved finite volume approximation of Reynolds averaged Navier-Stokes equations for simulation of wind flows in body-fitted grids generated by algebraic extrusion from digital terrain elevation data, proposed in Mirkov et. al. [1]. The approach is based on second-order accurate finite volume method with collocated variable arrangement and pressure-velocity coupling trough SIMPLE algorithm. The main objective is the attenuation of spurious pressure field oscillations in regions with discontinuity in grid line slopes, as encountered in grids representing highly non-uniform terrains. Moreover, the approach relaxes the need for grid generation based on elliptic partial differential equation or grid smoothing by applying fixed point iterations (i. e. Gauss-Seidel) to initial grid node positions resulting from algebraic grid generators. Drawbacks of previous approaches which ignored treatment of finite volume grid cell cases with intersection point offset in no...n-orthogonality corrections are removed. Application to real-life wind farm project at Dobric (Svrljig, Serbia) is used to assess the effectiveness of the method. The results validate the view in which accurate discretization of governing equations play more important role than the choice of turbulence modeling closures.
Ključne reči:
wind flow / finite-volume method / non-orthogonal grids / complex terrainsIzvor:
Thermal Science, 2016, 20, S223-S233Finansiranje / projekti:
- Razvoj novog meteorološkog mernog stuba za karakterizaciju turbulentnih parametara vetra (RS-MESTD-Technological Development (TD or TR)-33036)
DOI: 10.2298/TSCI151025197M
ISSN: 0354-9836; 2334-7163
WoS: 000378584200020
Scopus: 2-s2.0-84979943717
Institucija/grupa
VinčaTY - JOUR AU - Mirkov, Nikola S. AU - Stevanović, Žarko M. PY - 2016 UR - https://vinar.vin.bg.ac.rs/handle/123456789/1146 AB - In this paper we validate an improved finite volume approximation of Reynolds averaged Navier-Stokes equations for simulation of wind flows in body-fitted grids generated by algebraic extrusion from digital terrain elevation data, proposed in Mirkov et. al. [1]. The approach is based on second-order accurate finite volume method with collocated variable arrangement and pressure-velocity coupling trough SIMPLE algorithm. The main objective is the attenuation of spurious pressure field oscillations in regions with discontinuity in grid line slopes, as encountered in grids representing highly non-uniform terrains. Moreover, the approach relaxes the need for grid generation based on elliptic partial differential equation or grid smoothing by applying fixed point iterations (i. e. Gauss-Seidel) to initial grid node positions resulting from algebraic grid generators. Drawbacks of previous approaches which ignored treatment of finite volume grid cell cases with intersection point offset in non-orthogonality corrections are removed. Application to real-life wind farm project at Dobric (Svrljig, Serbia) is used to assess the effectiveness of the method. The results validate the view in which accurate discretization of governing equations play more important role than the choice of turbulence modeling closures. T2 - Thermal Science T1 - New non-orthogonality treatment for atmospheric boundary layer flow simulation above highly non-uniform terrains VL - 20 SP - S223 EP - S233 DO - 10.2298/TSCI151025197M ER -
@article{ author = "Mirkov, Nikola S. and Stevanović, Žarko M.", year = "2016", abstract = "In this paper we validate an improved finite volume approximation of Reynolds averaged Navier-Stokes equations for simulation of wind flows in body-fitted grids generated by algebraic extrusion from digital terrain elevation data, proposed in Mirkov et. al. [1]. The approach is based on second-order accurate finite volume method with collocated variable arrangement and pressure-velocity coupling trough SIMPLE algorithm. The main objective is the attenuation of spurious pressure field oscillations in regions with discontinuity in grid line slopes, as encountered in grids representing highly non-uniform terrains. Moreover, the approach relaxes the need for grid generation based on elliptic partial differential equation or grid smoothing by applying fixed point iterations (i. e. Gauss-Seidel) to initial grid node positions resulting from algebraic grid generators. Drawbacks of previous approaches which ignored treatment of finite volume grid cell cases with intersection point offset in non-orthogonality corrections are removed. Application to real-life wind farm project at Dobric (Svrljig, Serbia) is used to assess the effectiveness of the method. The results validate the view in which accurate discretization of governing equations play more important role than the choice of turbulence modeling closures.", journal = "Thermal Science", title = "New non-orthogonality treatment for atmospheric boundary layer flow simulation above highly non-uniform terrains", volume = "20", pages = "S223-S233", doi = "10.2298/TSCI151025197M" }
Mirkov, N. S.,& Stevanović, Ž. M.. (2016). New non-orthogonality treatment for atmospheric boundary layer flow simulation above highly non-uniform terrains. in Thermal Science, 20, S223-S233. https://doi.org/10.2298/TSCI151025197M
Mirkov NS, Stevanović ŽM. New non-orthogonality treatment for atmospheric boundary layer flow simulation above highly non-uniform terrains. in Thermal Science. 2016;20:S223-S233. doi:10.2298/TSCI151025197M .
Mirkov, Nikola S., Stevanović, Žarko M., "New non-orthogonality treatment for atmospheric boundary layer flow simulation above highly non-uniform terrains" in Thermal Science, 20 (2016):S223-S233, https://doi.org/10.2298/TSCI151025197M . .