本文采用直接数值模拟(DNS)方法研究了气固两相三维圆柱绕流的涡量场和颗粒扩散,并着重讨论了圆柱绕流中卡门涡街的形成和涡结构的转捩过程.同时分析了圆柱绕流中不同Stokes数的颗粒在涡结构作用下的横向扩散.结果显示Stokes数为1的颗粒主要分布在流场大尺度涡结构的外边界,而Stokes数为0.01的颗粒在涡结构的作用下,在流场中充分混合.
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