|July 17, 2012, 07:34||
Fvm Solution Oscillations
Join Date: Jul 2012
Posts: 1Rep Power: 0
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!!
Last edited by Luchete80; July 17, 2012 at 09:17.
|decoupling, fvm, oscillation, rhie-chow, upwind|
|Thread||Thread Starter||Forum||Replies||Last Post|
|Discretising: VOF versus FVM||FluidFlowSimulator||Main CFD Forum||1||August 7, 2011 11:48|
|FVM in 1-D spherical coordinates||lost.identity||Main CFD Forum||0||January 17, 2011 10:06|
|FVM vs FEM||elwolv||Main CFD Forum||8||June 5, 2007 13:23|
|comments on FDM, FEM, FVM, SM, SEM, DSEM, BEM||kenn||Main CFD Forum||2||July 18, 2004 18:28|
|References for FVM||Anthony Wachs||Main CFD Forum||8||February 20, 2002 20:23|