CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > OpenFOAM Running, Solving & CFD

Why solving

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

Reply
 
LinkBack Thread Tools Display Modes
Old   April 26, 2008, 13:46
Default Hi, one thing I've noticed in
  #1
kar
Senior Member
 
Kārlis Repsons
Join Date: Mar 2009
Location: Latvia
Posts: 111
Rep Power: 8
kar is on a distinguished road
Hi,
one thing I've noticed in my own and icoFoam solver too (for you to show it's not really specific): solve until reach stationary solution (iteration count 0), start solving again with obtained solution and iterations for U jump to 4, but for p to 150.
So there must be some deficiency of previous timestep values or similar... Can you explain more precisely reasons why solving starts again?

K.
kar is offline   Reply With Quote

Old   April 28, 2008, 11:52
Default Looks like it was simply insuf
  #2
kar
Senior Member
 
Kārlis Repsons
Join Date: Mar 2009
Location: Latvia
Posts: 111
Rep Power: 8
kar is on a distinguished road
Looks like it was simply insufficient precision for saved solution (too little digits).
kar is offline   Reply With Quote

Old   April 30, 2008, 15:15
Default But that is not all. Only if
  #3
kar
Senior Member
 
Kārlis Repsons
Join Date: Mar 2009
Location: Latvia
Posts: 111
Rep Power: 8
kar is on a distinguished road
But that is not all.
Only if solved phi surface field is read in at the beginning, there follows no iterating...
The cause is, that phi is not equal to mesh.Sf() & fvc::interpolate(U).
Should not be like that, right? That happens in cavity at Re=1000, only linear (unbounded) schemes used.
Could you, please, explain this problem?
kar is offline   Reply With Quote

Reply

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
Cannot see residuals while solving Dre CFX 3 January 29, 2009 12:00
FvVectorMatrixresidual before solving cosimobianchini OpenFOAM Running, Solving & CFD 0 January 28, 2007 12:02
solving a Matrix Behafarid Main CFD Forum 3 September 9, 2006 23:14
Solving the Psystem kupiainen OpenFOAM Running, Solving & CFD 3 May 2, 2005 12:34
MHD solving? Rajil Saraswat Main CFD Forum 1 March 21, 2003 12:26


All times are GMT -4. The time now is 14:04.