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Pr对具有表面蒸发环形池内热毛细对流的影响
引用本文:张利,吴春梅,李友荣.Pr对具有表面蒸发环形池内热毛细对流的影响[J].热科学与技术,2016,15(6):431-437.
作者姓名:张利  吴春梅  李友荣
作者单位:四川外国语大学 重庆南方翻译学院,重庆大学动力工程学院,重庆大学动力工程学院
基金项目:国家自然科学基金重点资助项目(11532015)
摘    要:为了了解普朗特数对具有表面蒸发的环形液池内热毛细对流的影响,对流体在其纯蒸汽环境中蒸发时的热毛细对流进行了数值模拟,流体Pr变化范围为0.01至50.00,环形液池半径比和深宽比分别为0.5和1.0。结果表明,随着Pr的增加,表面温度逐渐升高,表面蒸发质量通量增大,热毛细对流流胞逐渐向外壁和自由表面移动,这种影响随着蒸发Biot数增加而逐渐减小;当蒸发Bi较小时,总蒸发质量随Pr增加而增大,当Bi较大时,Pr对总蒸发质量影响很小。

关 键 词:数值模拟  普朗特数  热毛细对流  蒸发  环形液池
收稿时间:2016/7/2 0:00:00
修稿时间:2016/8/13 0:00:00

Effect of Prandtl Number on Thermocapillary Convection with Surface Evaporation in an Annular Pool
ZHANG Li,WU Chun-mei and LI You-rong.Effect of Prandtl Number on Thermocapillary Convection with Surface Evaporation in an Annular Pool[J].Journal of Thermal Science and Technology,2016,15(6):431-437.
Authors:ZHANG Li  WU Chun-mei and LI You-rong
Affiliation:Nanfang Translators College of SISU,College of Power Engineering,Chongqing University,College of Power Engineering,Chongqing University
Abstract:The numerical simulations on thermocapillary convection of the fluids with Prandtl number from 0.01 to 50 in the pure stream evaporation were carried out to understand the effect of Prandtl number on thermocapillary convection with surface evaporation in an annular pool. The radius ratio and the aspect ratio of the annular liquid pool are 0.5 and 1.0, respectively. The results show that with the increase of Prandtl number, the surface temperature rises gradually, the evaporative mass flux increases, and the thermocapillary convection cell moves gradually toward the outer wall and the free surface. These effects decrease with the increase of evaporation Biot number. When evaporation Biot number is smaller, the total evaporation mass increases with the increase of Prandtl number; when Biot number is larger, the effect of Prandtl number on the total evaporation mass is very small.
Keywords:numerical simulation  Prandtl number  thermocapillary convection  evaporation  annular pool
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