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请教一下各位,我做的圆环柱的传热,流向为周期性边界条件,内壁面恒定热流,外壁面绝热,内外壁面无滑移,fvOptions加了一个meanVelocityForce,(0.7 0 0),0.7就是流向,可是最终的速度云图,产生了一块速度较大的区域,并且该区域还会沿环向流动
如图,可以明显看到红色高速区在缓慢的逆时针移动,请问下为什么会产生这个高速区,以及为什么高速区会移动?