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Fvm Solution OscillationsHi all!
I'm writing a fvm code for incompressible flow following the Blazek's book (like the freeCFD solver): - stationary flow - coupled solver - colocated arrangement - dummy cells - gauss gradients for cell centers - averaged gradient w/ some correction for viscous fluxes - Piecewise linear velocity reconstruction for left and right state, simply with gradient at center and the distance to the wall (up=grad x r) I began w/ an upwind which simply averages the left and right state. I realize that the solucion oscillates in velocities and pressures. I was wondering if this scheme needs is a correction like the Rhie-Chow for colocated arrangements, or if the left and right scheme w/ the gradients used simply accounts for this correction (According to Blazek's book, the correction scheme used for the gradient walls prevents oscillations). I was checking out freeCFD code and i did'n find out a correction like this. Can anybody help me out? Thanks to all! Sorry my poor english!! |

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