针对流体体积模型(volume of fluid, VOF)在模拟相间传质过程时需要将界面质量流密度转换为单位体积传质速率的问题,对VOF模型中的界面传质与体积传质转换方法进行了改进.提出一种既解决了网格无关性问题又可以反映局部界面传质特性的转换方法,并给出了理论推导证明.推导出相应的网格无关性条件,通过划分3组不同尺寸的网格模拟了汽泡冷凝问题,并在汽泡生长方面对该转换方法加以简单应用,模拟结果与理论分析及实验结果符合良好,合理可行,可广泛应用到多相流中界面传热传质模拟的过程.
References
[1]
JEON S, KIM S, PARK G. Numerical study of condensing bubble in subcooled boiling flow using volume of fluid model[J]. Chemical Engineering Science, 2011, 66(23): 5899-5909.
[2]
魏敬华, 潘良明, 袁德文, 等. 过冷流动沸腾相变过程汽泡特性的VOF方法模拟[J]. 核动力工程, 2012, 33(6): 65-71.WEI Jinghua, PAN Liangming, YUAN Dewen, et al. VOF simulation of bubble characteristics of subcooled flow boiling[J]. Nuclear Power Engineering, 2012, 33(6): 65-71.
[3]
潘良明, 谭智威, 闫晓, 等. 窄流道内过冷流动沸腾汽泡凝结过程的数值模拟研究[J]. 核动力工程, 2011, 32(6): 86-90.PAN Liangming, TAN Zhiwei, YAN Xiao, et al. Numerical investigation of bubble condensation of subcooled boiling in narrow rectangular channels[J]. Nuclear Power Engineering, 2011, 32(6): 86-90.
[4]
潘良明, 谭智威. 过冷流动沸腾汽泡凝结变形及流场特性的数值模拟[J]. 重庆大学学报, 2012, 35(6): 53-57.PAN Liangming, TAN Zhiwei. Numerical investigation of bubble deformation and flow field characteristics of subcooled boiling during condensation[J]. Journal of Chongqing University, 2012, 35(6): 53-57.
[5]
PAN L, TAN Z, CHEN D, et al. Numerical investigation of vapor bubble condensation characteristics of subcooled flow boiling in vertical rectangular channel[J]. Nuclear Engineering and Design, 2012, 248: 126-136.
[6]
袁德文, 潘良明, 陈德奇. 竖直窄流道内过冷流动沸腾的单汽泡生长模型[J]. 化工学报, 2009, 60(11): 2723-2728.YUAN Dewen, PAN Liangming, CHEN Deqi. Model for single bubble growth of subcooled flow boiling in vertical narrow rectangular channel[J]. Journal of Chemical Industry and Engineering, 2009, 60(11): 2723-2728.
[7]
LEE W H. Pressure iteration scheme for two-phase flow modeling[J]. Multiphase Transport: Fundamentals, Reactor Safety, Applications, 1980, 1: 407-432.
[8]
ANSYS Inc. FLUENT theory guide[Z]. Pittsburg: ANSYS Inc, 2012.
[9]
RABHA S S, BUWA V V. Volume-of-fluid (VOF) simulations of rise of single/multiple bubbles in sheared liquids[J]. Chemical Engineering Science, 2010, 65(1): 527-537.
[10]
郭烈锦. 两相与多相流动力学[M]. 西安: 西安交通大学出版社, 2002: 323-410.
[11]
王遵敬, 陈民, 过增元. 蒸发与凝结现象的分子动力学研究[J]. 西安交通大学学报, 2001, 35(11): 1126-1130.WANG Zunjing, CHEN Min, GUO Zengyuan. Molecular dynamics study on evaporation and condensation[J]. Journal of Xi’an Jiaotong University, 2001, 35(11): 1126-1130.
[12]
KANDLIKAR S G. Fundamental issues related to flow boiling in minichannels and microchannels[J]. Experimental Thermal and Fluid Science, 2002, 26(2-4): 389-407.
[13]
ADDLESEE A J, CORNWELL K. Liquid film thickness above a bubble rising under an inclined plate[J]. Chemical Engineering Research and Design, 1997, 75(7): 663-667.
[14]
THORNCROFT G E, KLAUSNER J F, MEI R. An experimental investigation of bubble growth and detachment in vertical upflow and downflow boiling[J]. International Journal of Heat and Mass Transfer, 1998, 41(23): 3857-3871.
