TY  - JOUR
AU  - Radmilović-Rađenović, Marija
AU  - Rađenović, Dimitrije
AU  - Mitrić, Miodrag
AU  - Rađenović, Branislav
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9795
AB  - Though a simple daily observation, evaporation of drops is still poorly understood due to the complex nature that involves hydrodynamic effects in the bulk fluids and transport phenomena at the liquid-vapor interface. This paper reports on the evaporation of single component droplets (water, ethanol, acetone, and glycerol) levitated in a single-axis non-resonant levitator. It was observed that the acetone and ethanol evaporated faster than water, although the acetone is the most volatile. The estimated lifetime of acetone is less than 5min, which is much shorter as compared to 56min for ethanol or about 90min for water droplets. On the other hand, glycerol showed no tendency to evaporate. With increasing the evaporation time, the ratio of large and small semi-axis decreases and tends to 1 corresponding to changes in drops shape from oblate ellipsoid to a sphere. Based on the classical D2-law, the surface regression rates have been estimated. © 2020 All Rights Reserved.
T2  - Journal of Applied Fluid Mechanics
T1  - Experimental Studies of The Evaporation of Pure Liquid Droplets in A Single-Axis Non-Resonant Levitator
VL  - 14
IS  - 2
SP  - 581
EP  - 587
DO  - 10.47176/jafm.14.02.31973
ER  - 

@article{
author = "Radmilović-Rađenović, Marija and Rađenović, Dimitrije and Mitrić, Miodrag and Rađenović, Branislav",
year = "2020",
abstract = "Though a simple daily observation, evaporation of drops is still poorly understood due to the complex nature that involves hydrodynamic effects in the bulk fluids and transport phenomena at the liquid-vapor interface. This paper reports on the evaporation of single component droplets (water, ethanol, acetone, and glycerol) levitated in a single-axis non-resonant levitator. It was observed that the acetone and ethanol evaporated faster than water, although the acetone is the most volatile. The estimated lifetime of acetone is less than 5min, which is much shorter as compared to 56min for ethanol or about 90min for water droplets. On the other hand, glycerol showed no tendency to evaporate. With increasing the evaporation time, the ratio of large and small semi-axis decreases and tends to 1 corresponding to changes in drops shape from oblate ellipsoid to a sphere. Based on the classical D2-law, the surface regression rates have been estimated. © 2020 All Rights Reserved.",
journal = "Journal of Applied Fluid Mechanics",
title = "Experimental Studies of The Evaporation of Pure Liquid Droplets in A Single-Axis Non-Resonant Levitator",
volume = "14",
number = "2",
pages = "581-587",
doi = "10.47176/jafm.14.02.31973"
}

Radmilović-Rađenović, M., Rađenović, D., Mitrić, M.,& Rađenović, B.. (2020). Experimental Studies of The Evaporation of Pure Liquid Droplets in A Single-Axis Non-Resonant Levitator. in Journal of Applied Fluid Mechanics, 14(2), 581-587.
https://doi.org/10.47176/jafm.14.02.31973

Radmilović-Rađenović M, Rađenović D, Mitrić M, Rađenović B. Experimental Studies of The Evaporation of Pure Liquid Droplets in A Single-Axis Non-Resonant Levitator. in Journal of Applied Fluid Mechanics. 2020;14(2):581-587.
doi:10.47176/jafm.14.02.31973 .

Radmilović-Rađenović, Marija, Rađenović, Dimitrije, Mitrić, Miodrag, Rađenović, Branislav, "Experimental Studies of The Evaporation of Pure Liquid Droplets in A Single-Axis Non-Resonant Levitator" in Journal of Applied Fluid Mechanics, 14, no. 2 (2020):581-587,
https://doi.org/10.47176/jafm.14.02.31973 . .

TY  - JOUR
AU  - Radmilović-Rađenović, Marija
AU  - Beličev, Petar
AU  - Rađenović, Branislav
PY  - 2018
UR  - http://www.doiserbia.nb.rs/Article.aspx?ID=1451-39941800003R
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8118
AB  - Electron field emission limiting the accelerating gradient in superconducting cavities remains the dominant setback in cavity production. The need to understand and control the field emission has become increasingly important because of the prospect of using high-gradient structures in linear colliders. Since building an accelerator structure is a complicated and cosily process, elimination of unnecessary steps has priority. In this paper an analysis of the influence of the enhanced field emission in superconducting radio frequency cavity together with modal field calculations by using COMSOL finite elements package has been presented. The obtained results reveal that the electric field required for the field emission is generated in the cavity irises. The imperfection of the cavity surface leading to very high fields is modelled by a simple cone. The estimated value of the enhancement factor for the cone lip of around 4 is in agood agreement with the data found in the literature. In addition, from the slopes and the intercepts of the Fowler-Nordheim plots, a dependence of the enhancement factor and the effective area on the work function has been estimated. © 2018; Vinca Inst Nuclear Sci. All rights reserved.
T2  - Nuclear Technology and Radiation Protection
T1  - The effect of the enhanced field emission on the characteristics of the superconducting radio frequency cavities
VL  - 33
IS  - 4
SP  - 341
EP  - 346
DO  - 10.2298/NTRP180427003R
ER  - 

@article{
author = "Radmilović-Rađenović, Marija and Beličev, Petar and Rađenović, Branislav",
year = "2018",
abstract = "Electron field emission limiting the accelerating gradient in superconducting cavities remains the dominant setback in cavity production. The need to understand and control the field emission has become increasingly important because of the prospect of using high-gradient structures in linear colliders. Since building an accelerator structure is a complicated and cosily process, elimination of unnecessary steps has priority. In this paper an analysis of the influence of the enhanced field emission in superconducting radio frequency cavity together with modal field calculations by using COMSOL finite elements package has been presented. The obtained results reveal that the electric field required for the field emission is generated in the cavity irises. The imperfection of the cavity surface leading to very high fields is modelled by a simple cone. The estimated value of the enhancement factor for the cone lip of around 4 is in agood agreement with the data found in the literature. In addition, from the slopes and the intercepts of the Fowler-Nordheim plots, a dependence of the enhancement factor and the effective area on the work function has been estimated. © 2018; Vinca Inst Nuclear Sci. All rights reserved.",
journal = "Nuclear Technology and Radiation Protection",
title = "The effect of the enhanced field emission on the characteristics of the superconducting radio frequency cavities",
volume = "33",
number = "4",
pages = "341-346",
doi = "10.2298/NTRP180427003R"
}

Radmilović-Rađenović, M., Beličev, P.,& Rađenović, B.. (2018). The effect of the enhanced field emission on the characteristics of the superconducting radio frequency cavities. in Nuclear Technology and Radiation Protection, 33(4), 341-346.
https://doi.org/10.2298/NTRP180427003R

Radmilović-Rađenović M, Beličev P, Rađenović B. The effect of the enhanced field emission on the characteristics of the superconducting radio frequency cavities. in Nuclear Technology and Radiation Protection. 2018;33(4):341-346.
doi:10.2298/NTRP180427003R .

Radmilović-Rađenović, Marija, Beličev, Petar, Rađenović, Branislav, "The effect of the enhanced field emission on the characteristics of the superconducting radio frequency cavities" in Nuclear Technology and Radiation Protection, 33, no. 4 (2018):341-346,
https://doi.org/10.2298/NTRP180427003R . .