|August 21, 2012, 22:33||
the initial condition for transient simulation
Join Date: Aug 2012
Posts: 11Rep Power: 4
i am modeling a ducted fan in cfx. And i'd like to run a transient analysis using the steady state simulation as an initial guess. however, it's very hard to reach convergence in the steady state simulation, and the RMS Residual Level of velocity is about 2.2*10^-4.
Can i use this steady condition as the initial guess for the transient simulation?
thanks, any help would be appreciated!
|August 21, 2012, 22:57||
Join Date: Mar 2010
Posts: 73Rep Power: 7
Check for the mass and momentum imbalances, if they are ok then you can use the result as initial conditon for transient simulation. You can have an additional check by monitoring some integral quantity like torque.
If the problem which your simulating is inherently transient in nature, then the residuals would be oscillating and achieving convergence criteria would be difficult.
All the best
|initial conditions, transient simulation|
|Thread||Thread Starter||Forum||Replies||Last Post|
|transsonic nozzle with rhoSimpleFoam||Unseen||OpenFOAM Running, Solving & CFD||7||April 16, 2014 03:38|
|SLTS+rhoPisoFoam: what is rDeltaT???||nileshjrane||OpenFOAM Running, Solving & CFD||4||February 25, 2013 05:13|
|alphaEqn.H in twoPhaseEulerFoam||cheng1988sjtu||OpenFOAM Bugs||14||September 18, 2011 13:46|
|Orifice Plate with a fully developed flow - Problems with convergence||jonmec||OpenFOAM Running, Solving & CFD||3||July 28, 2011 05:24|
|MRFSimpleFOAM goes divergenced!||renyun0511||OpenFOAM Running, Solving & CFD||0||November 19, 2009 03:11|