CFD Online Discussion Forums

CFD Online Discussion Forums (https://www.cfd-online.com/Forums/)
-   OpenFOAM Running, Solving & CFD (https://www.cfd-online.com/Forums/openfoam-solving/)
-   -   No difference on the results with many shemes (https://www.cfd-online.com/Forums/openfoam-solving/196814-no-difference-results-many-shemes.html)

Fauster December 17, 2017 15:38

No difference on the results with many shemes
 
Hello everyone,

I am working on a case very similar to the pitzDaily tutorial (simpleFoam) with a very fine mesh and I observe no difference on the results with first order scheme (Gauss upwind) and many second order schemes like linearUpwind, linear, QUICK etc...

I change also my grad schemes from linear to leastSquare and fourth and I observe also no significant change (less than 0.5%) on my results.

Is it possible that with a very fine mesh all the schemes give almost the same results (less than 0.5% difference) ? Am I observing something usual or am I missing something ?

I precise that I am using the results obtained with the simplest schemes (grad : Gauss linear, div : Gauss upwind) to initialize the others calculations.

Thanks a lot for your help.

:)


All times are GMT -4. The time now is 11:39.