Simulation of thermocapillary flow in a two dimensional cavity with lattice Boltzmann method |
| |
Authors: | LIANG Gongyou ZENG Zhong YAO Liping ZHANG Liangqi QIU Zhouhua and MEI Huan |
| |
Institution: | Department of Engineering Mechanics, College of Resource and Environment Science,Chongqing University, Chongqing 400044, China;Department of Engineering Mechanics, College of Resource and Environment Science,Chongqing University, Chongqing 400044, China;Department of Engineering Mechanics, College of Resource and Environment Science,Chongqing University, Chongqing 400044, China;Department of Engineering Mechanics, College of Resource and Environment Science,Chongqing University, Chongqing 400044, China;Department of Engineering Mechanics, College of Resource and Environment Science,Chongqing University, Chongqing 400044, China;Department of Engineering Mechanics, College of Resource and Environment Science,Chongqing University, Chongqing 400044, China |
| |
Abstract: | Thermocapillary flow driven by an unbalanced surface tension plays the most important role for mass and heat transport in floating zone melt crystal growth under microgravity. The authors develop both a serial and a parallel codes with lattice Bhatnagar-Gross-Krook(BGK) model using two distribution functions, and numerically study the thermocapillary flow in a two dimensional square cavity with a single free surface under microgravity condition. The serial code is developed by combining collision and propagation step, using a temporary array to continuously read distribution functions, and its performance is improved two times faster than the code with separating the collision and propagation step. The MPI parallel code is proposed utilizing one dimensional partitioning and non-blocking communication. The accurate and reliable results are achieved with both the serial and parallel codes by comparing with CFD results simulated by the finite volume method; the MPI parallel code has high performance. |
| |
Keywords: | lattice Boltzmann method MPI parallel computing thermocapillary flow message passing |
|
| 点击此处可从《保鲜与加工》浏览原始摘要信息 |
| 点击此处可从《保鲜与加工》下载免费的PDF全文 |
|