Numerical simulation of natural convection in a sessile liquid droplet

被引:0
作者
M. V. Bartashevich
I. V. Marchuk
O. A. Kabov
机构
[1] Kutateladze Institute of Thermophysics SB RAS,
来源
Thermophysics and Aeromechanics | 2012年 / 19卷
关键词
sessile droplet; convective heat transfer; thermal convection;
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摘要
Heat transfer in a sessile liquid droplet was studied with numerical methods. A computer code was developed for solving the problem of convection in an axisymmetric hemispherical droplet and in a spherical layer as well. The problem of establishing an equilibrium state in a droplet was solved using several variables: temperature, stream function, and vorticity. Simulation was performed for droplets of water, ethyl alcohol, and model liquids. Variable parameters: intensity of heat transfer from droplet surface, Rayleigh and Marangoni dimensionless criteria, and the characteristic temperature difference. It was revealed that the curve of convective flow intensity versus heat transfer intensity at droplet surface has a maximum. A dual-vortex structure was obtained in a stationary hemispherical profile of liquid droplet for the case of close values for thermocapillary and thermogravitational forces. Either thermocapillary or thermogravitational vortex might be dominating phenomena in the flow structure.
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页码:317 / 328
页数:11
相关论文
共 53 条
  • [1] Hu H.(2005)Analysis of the microfluid flow in an evaporating sessile droplet Langmuir 21 3963-3971
  • [2] Larson R.G.(2002)Evaporation of water droplets placed on heated horizontal surface J. Heat Transfer. 124 855-863
  • [3] Ruiz O.E.(2006)Evaporation and Marangoni driven convection in small heated water droplets Langmuir 22 11085-11091
  • [4] Black W.Z.(2000)Contact line deposits in an evaporating drop Phys. Rev. E 62 756-765
  • [5] Girard F.(2009)Sessile drop in microgravity: creation, contact angle and interface Microgravity Sci. Technol. 21 67-76
  • [6] Antoni M.(2009)Gravitational-thermocapillary convection of fluid in the horizontal layer in co-current gas flow Doklady Physics 54 242-247
  • [7] Faure S.(2009)Gas flow and thermocapillary effects on fluid flow dynamics in a horizontal layer Microgravity Sci. Technol. 21 129-137
  • [8] Steinchen A.(2010)Deformation of a viscous heat conducting free liquid layer by the thermocapillary forces and tangential stresses: Analytical and numerical modeling Microgravity Sci. Technol. 22 407-414
  • [9] Deegan R.D.(2010)Mathematical and numerical modeling of convection in a horizontal layer under co-current gas flow Int. J. Heat and Mass Transfer 53 2795-2807
  • [10] Bakajin O.(2005)Spreading of thin volatile liquid droplets on uniformly heated surfaces J. Fluid Mech. 528 279-296