原文地址:[翻译]f mefx - advection stride and vorticity作者:猴子爱吃牛肉干 here are some comparison st dies concerning the relationship between the advection stride and vorticity parameters for f mefx. q ote from the f mefx 1.2 help  stride - the lower this stride is, the less dissipation of velocity and smoke will happen. it is a more or less inverse proportion to sim lation time. tip: for smoke with many small c rls yo may want to decrease this n mber to 0.1 or less. 想要有很小很小的扰流,可以减少到0.1或者更小. vorticity - this parameter is very sef l for coarse grids, where sim lations lack detail. when yo increase grid detail then the need for vorticity is lowered, since the sim lation itself will res lt in more detail. higher vorticity will increase the n mber and strength of small vortices in the fl id. notes: the advection stride becomes more noticeable with higher vorticity. advection stride lower than 0.1 ( 0.1) res lts in lower sim lation times. lower vorticity, bigger c rls. higher vorticity, smaller c rls. (please feel free to post some of yo r observations regarding these parameters, i will be very happy to hear them) 当vorticity高的时候,stride 比较明显. stride0.1时,模拟时间更少. vorticity 小,扰流大,vorticity大,扰流小. 原文地址: mefx-advection-stride-and-vorticity 个人总结: 纵向:vorticity 0.5 最好 横向:0.25-0.75 最好.