|
[Sponsors] |
buoyantBoussinesqPimple p_rgh BOUNDARY CONDITIONS |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
May 7, 2014, 04:23 |
buoyantBoussinesqPimple p_rgh BOUNDARY CONDITIONS
|
#1 |
New Member
dell-ocqa aronne
Join Date: Feb 2014
Posts: 4
Rep Power: 12 |
Hi everybody
i'm trying to set a simple simulation with buoyantBuossinesqPimpleFoam, but i have a problem with the BC, especially with p_rgh and p. As far as i have understood for the p i have to set calculated since it is obtained as p=p_rgh+rhok*gh . The case is the following : a rectangular 2D column domain vertically oriented,with later impermeable walls, filled by water a T1 temperature. From below i inject at a constant rate water at a greater temperature T2. Now for the BC at the bottom i will set U-> fixedValue T-> fixedValue p->calcualted p_rgh-> ?? which is better?? zeroGradient is it possible or not for this variable?? at the Top U-> zeroGradient T->zeroGradient p->calculated p_rgh-> ?? which is better?? fixedValue uniform=0 since it is in atmosphere?? is it possible?? it is convenient to set the z coordinate at the top of my domain so i get p_rgh=p+0 ?? and setting p_rgh=0 as BC i will not have additional problems?? at the lateral wall i set U-> zeroGradient T->zeroGradient p->calculated p_rgh-> zeroGradient it is ok?? Another question is about the meaning of the last step in the PIMPLE algorithm p = p_rgh + rhok*gh; if (p_rgh.needReference()) { p += dimensionedScalar ( "p", p.dimensions(), pRefValue - getRefCellValue(p, pRefCell) ); p_rgh = p - rhok*gh; } where i specify the needReference() option?? and also the pRefValue and pRefCell?? I have to specify them or not?? Thanks so much to everybody!! |
|
May 20, 2014, 08:24 |
|
#2 |
Senior Member
Joachim Herb
Join Date: Sep 2010
Posts: 650
Rep Power: 21 |
pRefValue and pRefCell can be set in fvSolution:
http://www.openfoam.org/docs/user/fvSolution.php |
|
October 3, 2022, 14:33 |
|
#3 |
New Member
Edgar Fernando Rey Torra
Join Date: Aug 2022
Posts: 6
Rep Power: 3 |
hi aronne, did you get any light on this topics? it would be very helpful for me and i would appreciate it.
|
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
sliding mesh problem in CFX | Saima | CFX | 46 | September 11, 2021 07:38 |
Question about heat transfer coefficient setting for CFX | Anna Tian | CFX | 1 | June 16, 2013 06:28 |
symmetry boundary conditions in cfx | lost.identity | CFX | 41 | May 22, 2013 07:21 |
[Netgen] boundary conditions and mesh exporting | vaina74 | OpenFOAM Meshing & Mesh Conversion | 2 | May 27, 2010 09:38 |
[Commercial meshers] Trimmed cell and embedded refinement mesh conversion issues | michele | OpenFOAM Meshing & Mesh Conversion | 2 | July 15, 2005 04:15 |