|January 16, 2013, 16:05||
Convergence not with all turbulence modells
Join Date: Jan 2013
Posts: 7Rep Power: 2
I'm pretty new to fluent. I made by now some aerodynamic symulations of some airfoils. I do my hexa mesh in ICEM. When I have only one airfoil i don't have problems to achieve convergence, but now I'm doing some more complicated shapes (like two airfoils).
I have a question. What does it mean when I can not achieve convergence with one turbulence model (Kepsilon reliazable non equlibrium wall function) because of sinusoidal behaviour of CL during computing. But I'm able to achieve nice convergence with SA model. What does it mean? Bad quality of mesh? I paste ale some pict of my mesh.
|January 17, 2013, 04:44||
Join Date: Jun 2011
Posts: 508Rep Power: 7
1) If you don't get convergence with one model did you try to change the solution methods? Sometimes it's just a solver's problem.
2) What about your y+ on the airfoil?
3) You have some "jumps" in cell sizes in your mesh and also some strong angles. You could try to enhance your mesh by smoothing in ICEM.
The skeleton ran out of shampoo in the shower.
|Thread||Thread Starter||Forum||Replies||Last Post|
|Turbulence postprocessing||Mohsin||FLUENT||0||September 19, 2011 21:05|
|Turbulence Modells - Overview||bastil||OpenFOAM Running, Solving & CFD||4||April 19, 2010 17:18|
|About Turbulence Intensity (Pipe flow assimilated)||gRomK13||Main CFD Forum||1||July 10, 2009 03:11|
|increasing mesh quality is leading to poor convergence||tippo||CFX||2||May 5, 2009 10:55|
|CONTINuity convergence in ke TURBulence model||CFDstudent||Main CFD Forum||0||May 1, 2009 01:09|