|May 4, 2011, 06:28||
Coupled Equations ?
Join Date: Sep 2010
Posts: 223Rep Power: 9
I have 3 equations that are coupled together. First One is the momentum eqn in (U) is stationary no convection (stokes), and the others, one before it (Y) and another after it (C) that are transient convective (contain term fvm::ddt() + fvm::div(Phi, _).
The problem is when using the simpleFoam solver for the implementation i succeeded to converge with 4 relaxation factors being used: 3 for the eqns (U,Y,C) + 1 for pressure.
But my solution is time affected, and whenever i try not to use relaxation factors for (Y,C), it diverges.
I don't really understand the effective or how to use the relaxtion factors for different equations that are coupled together, especially, when some of them are stationary and the others are transient. what to do????????????????
thanks a lot
|Thread||Thread Starter||Forum||Replies||Last Post|
|coupled source term in 3 transport equations||mhassani||OpenFOAM Running, Solving & CFD||0||February 26, 2011 05:14|
|problem with gradient as source term in coupled equations||Cyp||OpenFOAM Programming & Development||0||August 16, 2010 13:12|
|coupled Navier-Stokes and convection-diffusion equations using in cfx||rystokes||CFX||0||November 2, 2009 06:14|
|How to solve coupled transport equations||nandiganavishal||OpenFOAM Running, Solving & CFD||4||November 22, 2008 17:43|
|Coupled equations solution||litonx||OpenFOAM Running, Solving & CFD||7||February 14, 2007 19:31|