|March 15, 2012, 00:44||
incompressible NS solver with multi-block structured grid
Join Date: Feb 2010
Location: Ulsan, Republic of Korea
Posts: 27Rep Power: 8
I recently wrote an incompressible Navier-Stokes solver code to deal with multi-block structured grid and immersed boundary method.
When I run sample cases with different Re conditions, I found some problem in my code.
When I run the case with Re of 100, it seems to work properly. But when I increase the Re to be 1000, then a certain source of error comes into play.
I attached the figures of results with different Re.
Why are problems? Does anybody have an idea on it?
I used preconditioned Bi-CG stab solver instead of LDU type solver to deal with asymmetric matrix due to block(refinement) interfaces.
The flow field behaves like checker board problem in some block interfaces.
I need your help orz
|March 15, 2012, 01:58||
Join Date: Mar 2009
Location: Nurenberg, Germany
Posts: 505Rep Power: 13
does not look like checker boarding to me. It looks like your convection term is creating unwanted sources. If this is the case first order upwind scheme should work fine. (for testing purposes).
|multi-block, navier-stokes solver|
|Thread||Thread Starter||Forum||Replies||Last Post|
|AnSys Structured Grid Development||douglas frongillo||Main CFD Forum||1||November 1, 2007 05:56|
|Block Structured Grid||aurel||Main CFD Forum||0||June 21, 2007 02:19|
|matrix solver about block structured grid||young min, Sohn||Main CFD Forum||1||July 11, 2000 19:35|
|Grid generator for structured grids||Tore Myhrvold||Main CFD Forum||5||January 21, 1999 09:09|
|Incompressible flow solver (staggered grid)||J. Ehrhard||Main CFD Forum||1||October 8, 1998 19:47|