|March 5, 2013, 08:40||
nutUSpaldingWallFunction - nutSpalartAllmarasWallFunction - Automatic Wall Treatment
Join Date: Nov 2012
Posts: 42Rep Power: 4
i am currently working on a diffusor case and i am trying to find the best wall function to simulate a centrifugal pump in OpenFOAM. I have tried nutkWallFunction, nutUWallFunction and nutUSpaldingWallFunction. i got pretty good results in especially nutUSpaldingWallFunction.
My turbulence model is kOmegaSST, and i am using openFOAM 2.1.x version.
I have compared the results with CFX kOmegaSST, which uses automatic wall function treatment, and i realised that the OpenFOAM results are as good as CFX results even though nutUSpaldingWallFunction is a continuous wall function treatment.
In this point, i have couple of questions:
1) is there a difference between nutSpalartAllmarasWallFunction (which is used in the earlier versions of OpenFOAM) and nutUSpaldingWallFunction?
2) Is it possible automatic wall treatment in openFoam, and if yes, how?
3) i think the formulation of nutUSpaldingWallFunction is coming from the "Spalding's law of the wall" model, or is there a difference between the formulations of the code and the "law of the wall" theory?
thanks in advance to all of you
|Thread||Thread Starter||Forum||Replies||Last Post|
|Wall treatment with OpenFOAM||roby||OpenFOAM Running, Solving & CFD||39||May 4, 2015 13:00|
|Boundary Layer & Wall Treatment||GRAUPS||OpenFOAM Running, Solving & CFD||1||October 15, 2012 23:16|
|Wall treatment - RSM turbulence model||djack||STAR-CCM+||1||September 12, 2012 10:51|
|Boundary Layer roughness/ low reynolds wall treatment||Luigi_||STAR-CCM+||1||March 14, 2012 09:40|
|Wall functions for near wall treatment : k - epsilon model||fivos||Main CFD Forum||4||April 27, 2011 07:44|