piso和pimple



  • 我看了看inetrfoam,INTERDYMFOAM,multiphaseinterfoam.multiphaseinterdymfoam这几个都是pimple来解,为何不用piso?



  • @搬运工不好当

    多相求解器为了数值稳定性可能pimple更稳定。如果细看的话,piso在openfoam里面并不多。不是simple就是pimple。毕竟pimple可以实现piso。

    下面是一个邮件里面的内容:

    • One comment I have is that the new solvers definitely requires PIMPLE to be used. Meaning, the number of outer correctors can hardly be 1 if you want a converged solution. In order to avoid iterating for too long, I usually fix required residuals. This will increase the computational time, since it takes between 5 and 20 iterations to converge.

    虽然他建议使用pimple,不过在我的多相求解算例我用的piso。并且结果没有差别。
    openfoam自带的算例好多都用的pimple。

    使用pimple和piso我个人更感觉是一个数值稳定性的问题而不是迭代求解算法的问题。


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