空间发展平板混和层流动的大涡模拟-3D与2D模拟的比较  

LARGE EDDY SIMULATION OF PLANT SPATIALLY EVOLVING MIXING LAYER

作　　者：杨武兵[1] 张会强[1] 王希麟[1] 郭印诚[1] 林文漪[1] 

机构地区：[1]清华大学工程力学系,北京100084

出　　处：《工程热物理学报》2004年第6期1046-1048,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.10002009)

摘　　要：本文利用大涡模拟方法研究了空间发展平板混合层流动,分别在三维模型和二维模型下,比较了大尺度结构涡的演化过程,以及流向速度、流向脉动速度、横向脉动速度和Reynolds应力的统计时均结果,并与实验结果对照,指出3D模拟无论在物理真实性还是预报结果准确性方面都要明显优于2D模拟。Large eddy simulation of plane spatially evolving turbulent mixing layer is carried out in this paper. The flow is modeled with two- and three-dimension model, respectively. The predicted results of these two models, such as evolution of large vortex structures and mean properties of stream wise velocities, fluctuating velocities as well as Reynolds shear stress, are compared with each other and with the experiment data. It shown that 3D model is superior to 2D model not only in physical reality but also in result accuracy.

关 键 词：平板混合层流动 大涡模拟 3D模拟 2D模拟 

分 类 号：O359[理学—流体力学]