CFD Online Logo CFD Online URL
Home > Forums > Main CFD Forum

Re: Preconditioning for moving grids

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Display Modes
Old   April 6, 2006, 06:18
Default Re: Preconditioning for moving grids
Posts: n/a
Dear Friends,

I am presently extending the Weiss-Smith preconditioning onto unstaedy flows with moving grids. Is it necessary to modify the preconditioning matrix by incorporating the grid velocities. I think it should not be, as the preconditioning matrix should satisfy P dV = dU , where P is the preconditioning matrix, V =[p u v T] and U=[ \rho \rho u \rho v e], with e defined suitably. Since the grid velocities affect the convective speeds and hence the fluxes, and V and U are untouched, P need not be modified.

Any suggestions and comments are most welcome. If anyone has test cases for incompressible, unsteady flows (inviscid/viscous/turbulent) it would be nice if they could point out the links/references.

Thanks in advance,


  Reply With Quote


Thread Tools
Display Modes

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
OpenFOAM - structured or unstructured Grids ? thomasduerr OpenFOAM Meshing & Mesh Conversion 18 October 10, 2014 06:31
A question about dynamic overset grids JXIA Main CFD Forum 4 January 10, 2008 04:50
UDF Face Fluxes & Partitioned Grids Greg Perkins FLUENT 0 April 6, 2001 01:50
implementing preconditioning clifford bradford Main CFD Forum 0 October 19, 2000 16:03
local preconditioning Manish Jaiman Main CFD Forum 3 May 1, 2000 08:31

All times are GMT -4. The time now is 05:24.