内蒙古地区某多层三塔楼建筑流场计算域的选择

摘要

The size of the flow field calculation domain has a great influence on the rationality of the numerical simulationof the structural flow field. A small calculation domain can give rise to backflow at the outlet and emanative results,bringing about unreal simulation of the flow field. On the other hand,a big calculation domain can result in the slow computing speed,causing unnecessary waste. With a case study on a multilayer three-tower building in Inner-Mongolia this paper simulates the stream over the structure under steady state by using the stream analysis software CFX,and finally obtainsthe reasonable flow field computational domain.%流场计算域的大小对结构流场数值模拟的合理性有很大影响，计算域过小会造成出口处产生回流，致使结果发散，不能真实地模拟流场；而计算域过大则会使计算速度变慢，造成不必要的浪费。以内蒙古地区某多层三塔建筑为例，采用流体分析软件CFX模拟了其在稳态下的绕流，最终确定了合理的流场计算域。