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用LES算大气边界层时网格大小要达到什么量级?
@搬运工不好当
看文献和算例,发现近地网格 长30m, 宽30m, 高 10m便可以计算。 但保证整个domain 不小于 3km3Km1km
首先要考虑y+; 其次,要考虑aerodynamic roughness length和roughness height的关系,壁面网格的高度应该大于roughness height。
@pippowong 可以简单说说这种非常大尺寸的大气模拟和普通的流场模拟的区别么?以及相关的侧重点?