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大家好，我在计算小扰动条件下的流动问题。射流速度入口条件是U=1.5+0.45sin(2Pi100). 算例中平均流速已经很小，施加弱扰动后感觉扰动很快被耗散掉了，有什么解决办法吗？ 注：求解器采用reactingFoam（该求解器采用的pimple算法）,离散格式为中心差分