CFD Online Logo CFD Online URL
Home > Forums > CFX


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

LinkBack Thread Tools Display Modes
Old   June 27, 2003, 08:36
Default Interpolate
Posts: n/a
Hi, I used the command "cfx5interp" to interpolate an old results file to a new mesh file "def". But when I restart I have good convergence but really strange and impossible results ( like zone with 55000 m/s). Anyone knows where is the PROBLEM?????

  Reply With Quote

Old   June 29, 2003, 18:44
Default Re: Interpolate
Glenn Horrocks
Posts: n/a
Hi Stex,

The interpolation routine does not handle changes in the mesh position very well. It generally gives good results where the geometry does not change (eg mesh refinement on the same geometry). If you try to interpolate onto a similar but different geometry the interpolation routine gives rubbish, and this causes problems with convergence of the solver as the initial condition is so terrible.

It looks like you are suffering this problem. I recommend just using an initial condition specified in the ccl file.

  Reply With Quote

Old   June 30, 2003, 08:04
Default Re: Interpolate
Posts: n/a
For clarificiation, I understand when using interpolation and the mesh/geometry change and a new point lies outside of the original mesh, interpolation is replaced by extrapolation from the nearest point in the old mesh. You would normally see a spike in residuals when restarting from an interpolated solution, however, you appear to be getting worse behaviour than this. Do you have multiple domains (i.e. many subdomains) in the problem?
  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
interpolate field to sampledPlane nikwin OpenFOAM 5 October 13, 2011 08:31
Interpolate in some points ivan_cozza OpenFOAM Post-Processing 2 April 22, 2009 08:58
overflow when interpolate initial result richard CFX 1 June 11, 2008 07:36
Interpolate data across interfaces Nick Brooks FLUENT 2 July 24, 2007 13:51
interpolate error of boundary profile justin FLUENT 5 June 5, 2007 04:01

All times are GMT -4. The time now is 01:58.