ddtPhiCorr函数有什么用
PISO里的。// The ddtPhiCorr term accounts for the divergence of the face velocity field by taking out the
//difference between the interpolated velocity and the flux.
phi = (fvc::interpolate(U) & mesh.Sf())
+ fvc::ddtPhiCorr(rUA, U, phi);
不用它不行吗？
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