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

buoyantBoussinesqPisoFoam Questions

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

Reply
 
LinkBack Thread Tools Display Modes
Old   March 25, 2010, 12:52
Default buoyantBoussinesqPisoFoam Questions
  #1
Member
 
Matthew J. Churchfield
Join Date: Nov 2009
Location: Boulder, Colorado, USA
Posts: 49
Rep Power: 8
mchurchf is on a distinguished road
To whomever can answer,

I have two questions about buoyantBoussinesqPisoFoam.

1). Why is pEqn.setReference(pRefCell,pRefValue) not called after setting up the pressure equation? If you take a look at pisoFoam, the pressure referencing is done, but why isn't it done in buoyantBoussinesqPisoFoam?

2). Why is the temperature equation solved before the PISO loop. Currently, the T equation is solved right after the velocity predictor step. The predicted velocity is not divergence-free, and the T equation uses this incorrect velocity in its convection term. Wouldn't it be more appropriate to solve for T after the PISO loop with a good divergence-free velocity? I guess that would mean that velocity and pressure are solved with a time lagged T.

Thanks,

Matt
mchurchf 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
Some perhaps stupid questions about calculix lynx Open Source Meshers: Gmsh, Netgen, CGNS, ... 11 May 17, 2010 06:48
So many questions in DPM & UDF - Help! URGENT! Prashanth FLUENT 0 March 3, 2009 23:26
Fluent FAQ Started - Fill it With Questions Jonas Larsson FLUENT 0 September 12, 2005 10:41
Few questions phi FLUENT 0 March 4, 2005 10:23
turbulence modeling questions llowen Main CFD Forum 3 September 11, 1998 04:24


All times are GMT -4. The time now is 02:58.