FV/MC混合算法求解轴对称钝体后湍流流场

介绍一种有限容积／Monte Carlo结合求解湍流流场的相容的混合算法．有限容积法求解Reynolds平均的动量方程和能量方程，Monte Carlo方法求解模化的脉动速度—频率—标量联合的PDF方程．将该算法发展到无结构网格，探讨了在无结构网格中实现两种方法的耦合，包括颗粒定位，颗粒场和平均场之间数据交换等问题．并以二维轴对称钝体后湍流流场作为算例，比较了计算结果与实验结果．

FV/MC HYBRID ALGORITHM FOR AXISYMMETRIC BLUFF BODY STABILISED TURBULENT FLOWS

The consistent hybrid finite volume/Monte Carlo algorithm is used to simulate turbulent flow. In this algorithm, modeled joint fluctuating velocity-frequency-composition PDF equation is solved by Monte Carlo method. Finite volume method is incorporated to solve Reynolds averaged mass, momentum and energy equations, which can be obtained by integrating the JPDF equation in sample space. Mean pressure and velocity are provided by finite volume method, while turbulent fluxes are extracted from particle fields. The aim of this study is to develop the algorithm on unstructured meshes. Some specific issues relating to the coupling between particle fields and mean fields on triangular grid are investigated. The method of the tracing of particle, node to particle interpolation and particle to node assignment used here is described. The axisymmtric bluff-body stabilized flow is presented here as test case. Comparison is made between the computational and experimental results.