本文采用展向周期性布置圆柱形粗糙元的方式,直接数值模拟了平板表面流向条纹的增长过程.研究发现由于流向涡的“lift-up”效应,粗糙元下游区域出现高速条纹结构,而粗糙元的尾流对于条纹结构的初期形成有着重要影响.随着流动的不断发展,展向脉动速度分布有发展成为正弦曲线形式的趋势,而法向脉动速度峰值则呈先减小后增大的趋势.
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