粘性涡方法在多圆柱绕流数值模拟中的应用  

A NAVIER-STOKES SIMULATION OF FLOW A ROUND CIRCULAR CYLINDERS BY VISCOUS VORTEX METHOD

作　　者：刘晶昌[1] KitLam 徐建中[1] 

机构地区：[1]中国科学院工程热物理研究所,北京100080 [2]TheHongKongPolytechnicUniversity

出　　处：《工程热物理学报》1998年第2期164-169,共6页Journal of Engineering Thermophysics

基　　金：国家自然科学基金;教委博士点专项基金

摘　　要：用粘性涡方法求解了涡量速度形式的二维不可压缩Navier—Stokes方程．利用分步方法分别求解无粘的对流运动和粘性扩散，粘性扩散用随机走步方法来处理，利用涡量交换技术来满足无滑移边界条件，同时为进一步减少计算量，在求解对流速度时，采用了多极子展开法加速技术使得计算量由N2的量级减少到NlogN的量级．数值模拟了单圆柱和双圆柱纵向排列的绕流流场．The vorticity-velocity formulation of the Navier-Stokes equations are solved by viscousvortex method. The fractional step technique has been used. The viscous diffusion is treatedby a random walk method, the no-slip condition is not always enforced by the generationof new vortices at the boundary but instead by modifying the strength of the vortices inthe vicinity of the boundary; Particle-Box method is used to reduce the operation counts toO(Nlog N) from O(N2 ). The time dependent viscous flow around a circular cylinder andtwo circular cylinders in tandem arrangement of difference spacing at Reynolds numbers ofRe=3000 is presented.

关 键 词：粘性涡方法 多圆绕流 N-S方程 数值模拟 

分 类 号：TK121[动力工程及工程热物理—工程热物理]