CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > FLUENT

PLEASE, HELP: INTERPOLATION + CLOSED DOMAIN

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

Reply
 
LinkBack Thread Tools Display Modes
Old   May 21, 2008, 09:09
Default PLEASE, HELP: INTERPOLATION + CLOSED DOMAIN
  #1
Sasha
Guest
 
Posts: n/a
Hi. I'm puzzled with a following question of interpolating the results from one mesh to another: I have some solution (believe it was converged) of flow around a rotating propeller in some closed (no inlets outlets) domain filled with water (incompressible) - laminar. I felt like coarsing the mesh and got to Gambit to built a somewhat rough grid. Next steps: copying the boundary conds through write/read-bc; interpolating pressure+velosity components. What is strange that right after reading the interpolation file velosity components are read as they were on "fine" mesh, but!!! pressure got some additional value at all the points but have preserved the same gradients throughout the domain. This stayed the same also after the new (coarse) solution was fully converged. It changed significantly the axial load on the propeller. The situation didn't change after initializing from zero. The pressures still were different, while velosities were the same. Can somebody help me with this issue? May be the problem is with formulating pressure in no-inlets, outlets domain? Thax a lot.
  Reply With Quote

Old   May 21, 2008, 09:35
Default Re: PLEASE, HELP: INTERPOLATION + CLOSED DOMAIN
  #2
Andrew Clarke
Guest
 
Posts: n/a
Did you try making sure that the number of mesh line (or face if 3d) divisions at the outlet of your 1st part matches the mesh line division at the inlet of your 2nd part model.

pressures may be different at the inlet of your 2nd part because you may have put a boundary condition of fixed pressure at the inlet (your pressure boundary condition if nominated will be your pressure value there regardless of pressure at the outlet of your 1st part).. so therefore you could also check the boundary conditions.
  Reply With Quote

Old   May 21, 2008, 10:15
Default Re: PLEASE, HELP: INTERPOLATION + CLOSED DOMAIN
  #3
Sasha
Guest
 
Posts: n/a
Hi, thanx for the advise, but in my case there are no inlets/oulets - thisi is an enclosure. Propeller in the closed room. thnx
  Reply With Quote

Old   May 27, 2008, 12:16
Default Re: PLEASE, HELP: INTERPOLATION + CLOSED DOMAIN
  #4
Andrew Clarke
Guest
 
Posts: n/a
there is a fluent userguide tutorial that deals with a problem like yours... Not sure which one it is.. i remember it being a 2d problem
  Reply With Quote

Old   May 27, 2008, 23:08
Default Re: PLEASE, HELP: INTERPOLATION + CLOSED DOMAIN
  #5
Sasha
Guest
 
Posts: n/a
I'll check it out. thanx.
  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
Pressure build-up with VOF in a closed domain Juan FLUENT 0 October 16, 2008 03:26
Is there any functionality of OpenFOAM to solve multiblock domain without merging the domain swlee OpenFOAM Running, Solving & CFD 4 January 23, 2008 13:18
bc for closed tunnel Hanni FLUENT 0 March 14, 2007 22:06
closed end geometry Rashmi FLUENT 1 January 15, 2007 01:40
help:pumping gas into a closed domain frank FLUENT 4 April 11, 2006 09:27


All times are GMT -4. The time now is 22:12.