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目前做了一个半潜平台的自由衰减,使用两种不同湍流模型结果大不相同,RANS SA求出来的一次阻尼大二次阻尼小,SA-DES相反,但是平均线性阻尼率却没什么变化,想请问各位大佬们两个湍流模型的差异,大概是什么原因导致的这个差异! 左边的洋红色是RANS SA,右边的是SA-DES
SA是Spalart-Allmaras,Reynolds-Averaged Navier-Stokes Spalart-Allmaras turbulence和Spalart-Allmaras Detached Eddy Spalart-Allmaras采用的是标准的SA,不是高雷诺数的。DES也是标准的DES模型