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Old   June 10, 2001, 05:32
Default Oscillating Solution
  #1
Peter
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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
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Old   June 11, 2001, 00:33
Default Re: Oscillating Solution
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Tareq Al-shaalan
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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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