两相平板混合层流动的双向耦合离散涡法数值模拟

NUMERICAL SIMULATION OF MIXING LAYER FLOW USING TWO-WAY COUPLING METHOD

提出了一种新的双向耦合离散涡方法,其能方便地将颗粒对流场的作用结合进离散涡模拟中,同时又不破坏离散涡方法固有的优点。采用这种方法对两相平板混合层流动进行了数值模拟。模拟结果表明,在颗粒作用存在的情况下,混合层流动仍能保持良好的自相似性,其动量厚度沿流向仍呈线性发展,说明颗粒不影响大涡结构间配对与合并的随机性。同时,颗粒对混合层流动高速端自由流有阻滞作用,并会使连续相湍流衰减。

A new momentum coupling method in the frame of the discrete vortex method is proposed. It can incorporate the influence of particle phase on the flow field easily and preserve the inherent merits of the discrete vortex method. Mixing layer flow is numerically simulated using this new method. The mixing layer still can retain its self-similarity with the influence of particle phase. The particles don t affect the linear growth of momentum thickness along the streamwise direction, indicating that the pairing ...