kOmegaSST omega residuals strange behaviour

 User Name Remember Me Password
 Register Blogs Members List Search Today's Posts Mark Forums Read

August 8, 2012, 16:23
kOmegaSST omega residuals strange behaviour
#1
Member

Pekka Pasanen
Join Date: Feb 2012
Location: Finland
Posts: 38
Rep Power: 5
Hi, i'd like to know if some of you fellow foamers could explain why my omega residuals are very very small and not resolving?

The case is steady state external aerodynamics and i used motorcycle simpleFoam tutorial as base, except motorcycle is frisbee and there is no lower wall

Mesh is ~8M cells hexa and wall functions are in use.

I used k=0.35 and omega=2 as a initial condition, inlet is fixedValue and outlet is inletOutlet and sides are slip and my air speed is 20 m/s. Numerics are cellLimited leastSquares 1 for grad, linearUpwindV for div(U) and upwind for k and omega. Pressure solver is PCG and otherwise PBiCG, tol 1e-08 and reltol 0.01. Under-relaxation is p 0.3, U 0.5, k and omega 0.3.

Solution is not converged in attached picture but i'm more worried about the omega residual behaviour.
Attached Images
 residuals.png (20.2 KB, 37 views)
Attached Files
 fvSchemes.txt (1.4 KB, 9 views) fvSolution.txt (1.9 KB, 8 views)

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post nicolarre OpenFOAM Running, Solving & CFD 10 January 29, 2015 12:53 duongquaphim OpenFOAM Running, Solving & CFD 10 August 20, 2013 14:00 hani OpenFOAM Running, Solving & CFD 20 March 6, 2013 11:06 FelixL OpenFOAM Bugs 27 March 27, 2012 09:02 PeterGG CD-adapco 3 July 27, 2007 12:52

All times are GMT -4. The time now is 01:03.

 Contact Us - CFD Online - Top