# Oscillating Solution

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 June 10, 2001, 05:32 Oscillating Solution #1 Peter Guest   Posts: n/a Hi to all, I summarize in few words the topic of my work: SOLVING 2D EULER EQUATIONS, INCOMPRESSIBLE FLOW, WITH FD APPROACH AND EULER TIME-MARCHING EXPLICIT SCHEME AND AN ADI SOLVER FOR THE PRESSURE EQUATION BC's are implemented with dummy nodes in the usual way both in the pressure equation and the momentum equations. My major obstacle is that I am getting converged solution but oscillating, both in pressure and velocities. I am quite sure this is due to odd-even decoupling of cells, since I am using CDS for the discretisation. My question is: Is there any other combination of discretisation schemes that can garantee converged solution without oscillations??? or how these oscillations can be avoided while maintaining CDS??? Thanks

 June 11, 2001, 00:33 Re: Oscillating Solution #2 Tareq Al-shaalan Guest   Posts: n/a You can use non statgred grid, or try to use finit diffrence for the pressure equation to avoid the decoupling such as P(i+1) - 2p(i)+p(i-1) = f(u(i+1),u(i),u(i-1))

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