[CFD-Post] Viewing max residuals
 

Hi,

Is it possible to view in CFD-Post where the maximum residual (as plotted by the CFD-solver during a simulation) is in a fluid domain? I've tried Isosurface, Contours, Function calculator but cannot find where to get the max residual locations.

If I can where it is occuring then I can improve the mesh in that area to improve the RMS residuals and convergence - even though I'm getting a constant residual and monitor point values the RMS residual valve needs to go down by another order of magnitude.

Thanks

You can get the residuals in post if you have checked the "output equation residuals" in pre (under output control). Then they will show up in the variables list in post.

Thanks Lance.

I must have missed it in Output Control when I set up my monitor points.

However, I don't see any mention of residuals in the Variables list (even expanded all the lists in Variables). Have I done something wrong or am I looking in the wrong place (even though I think I've run out of place to look)?

They should be in the variables list, named something like P.Mass Residual, etc.

After the "output eqn residuals" check box, did you change "Eqn. Residuals" to "All" from "None"?
If you run transient you'll need to check the "output eqn residuals" box under trn results as well to get the residuals in the trn files and not only in the .res file.

You can visualize the max. or min. residuals with a "point".

Then you can refine your mesh at this location.