LBE MRT方法模拟Marangoni对流  

Marangoni convection simulating by LBM-MRT method

作　　者：马斌[1] 李莉 

机构地区：[1]兰州交通大学机电工程学院热能与动力工程系,兰州730000 [2]兰州电力学校,兰州730000

出　　处：《科学通报》2011年第8期556-559,共4页Chinese Science Bulletin

基　　金：国家自然科学基金资助项目(50876040)

摘　　要：有机溶液在水表面溶解会引起表层表面张力变化,产生表面张力梯度,从而诱发Marangoni对流.采用LBE MRT方法对室温下圆柱烧杯中滴加低浓度乙醇溶液诱发的Marangoni对流现象进行模拟,结果表明由表面张力梯度诱发的Marangoni对流在表面薄层区域强度较大且速度梯度较大,但在主液相区流速相对很低.本文模拟的最大表层速度数值和表层速度分布结果与同条件下的实验结果基本相符.Numerical simulation was conducted to investigate the Marangoni convection induced by deposition of the surface tension lowering organic solution on the water interface by LBM-MRT method. Boundary conditions were set as experiments done before. Simulation results showed that Marangoni convection induced by the surface tension gradient has significant intensity and sharp velocity gradient near the interface, while the horizontal velocity in the main region of water is much lower than that near the interface. Both the maximum interface velocity and the distribution of the interface velocity in this simulation are consistent with the experimental measurement published before.

关 键 词：表面张力 Marangoni对流 LBEMRT 数值模拟 

分 类 号：TK124[动力工程及工程热物理—工程热物理]