@BlookCFD 谢谢您的指点,我有看了一眼程序,我理解错了,OF里面是通过计算barycentric displacement来获得barycentric coordinates的,我一直被src/lagrangian/basic/particle/particle.C里面的一句代码给误导了,现贴出来:
particle.C 1062-1096 OpenFOAM6 void Foam::particle::correctAfterInteractionListReferral(const label celli) { // Get the position from the barycentric data const vector pos(coordinates_.b(), coordinates_.c(), coordinates_.d()); // Create some arbitrary topology for the supplied cell celli_ = celli; tetFacei_ = mesh_.cells()[celli_][0]; tetPti_ = 1; facei_ = -1; // Get the reverse transform and directly set the coordinates from the // position. This isn't likely to be correct; the particle is probably not // in this tet. It will, however, generate the correct vector when the // position method is called. A referred particle should never be tracked, // so this approximate topology is good enough. By using the nearby cell we // minimize the error associated with the incorrect topology. coordinates_ = barycentric(1, 0, 0, 0); if (mesh_.moving()) { Pair<vector> centre; FixedList<scalar, 4> detA; FixedList<barycentricTensor, 3> T; movingTetReverseTransform(0, centre, detA, T); coordinates_ += (pos - centre[0]) & T[0]/detA[0]; } else { vector centre; scalar detA; barycentricTensor T; stationaryTetReverseTransform(centre, detA, T); coordinates_ += (pos - centre) & T/detA; } }其中的这句代码
coordinates_ += (pos - centre) & T/detA;其实前面已经先定义了
coordinates_ = barycentric(1, 0, 0, 0);后面计算单点的barycentric coordinates其实还是用的barycentric displacement的概念来转换的。
困扰了我两周的问题终于解决了,现在异常开心,在此对@东岳 和@BlookCFD 表示万分感谢。