|
[Sponsors] |
Pressure Correction Method for Cylindrical Coordinates |
![]() |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
![]() |
![]() |
#1 |
New Member
Eslam Reda
Join Date: Jun 2009
Posts: 19
Rep Power: 17 ![]() |
Hello every body, I am facing a trouble with the pressure correction method in a simple flow in pipe problem. When I use very low values for density (1 kg/m3), the code converges. While when using heavy densities (1000 kg/m3) the program diverges. Please I need your help in this annoying trouble.
![]() |
|
![]() |
![]() |
![]() |
![]() |
#2 |
Member
Join Date: Mar 2009
Posts: 62
Rep Power: 17 ![]() |
Hello,
What kind of help do you need ? Do you have a specific question ? What solver do you use ? RenardP |
|
![]() |
![]() |
![]() |
![]() |
#3 |
New Member
Eslam Reda
Join Date: Jun 2009
Posts: 19
Rep Power: 17 ![]() |
Hello, let's start:
Thanks so much. Eslam Reda. |
|
![]() |
![]() |
![]() |
![]() |
#4 |
Member
Join Date: Mar 2009
Posts: 62
Rep Power: 17 ![]() |
OK,
the SIMPLE algorithm is a classical one so I think you have implemented a correct version. In your place I would check the grid and the implementation of the boundary conditions. Usually a divergent solution is caused by bad implementation of the boundary conditions. Also if you can find an analytical solution for a simplified version of your tube problem you can test various parts of your implementation (e.g a Poiseuille flow in a duct). Paul |
|
![]() |
![]() |
![]() |
![]() |
#5 |
New Member
Eslam Reda
Join Date: Jun 2009
Posts: 19
Rep Power: 17 ![]() |
Hello again,
Surely I checked the code for a simple Poiseuielle flow problem. The program diverges at high densities but gives the expected analytical results for low densities. I wish to get the data, Dx, Dy, under-relaxation factor and Dt, for a solved water flow in a pipe problem. |
|
![]() |
![]() |
![]() |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
"Pressure Inlet" Boundary Setup | Wijaya | FLUENT | 15 | May 18, 2016 10:08 |
Pressure correction problem | richard_larson | OpenFOAM Running, Solving & CFD | 8 | October 30, 2008 08:48 |
Streamfunction-vorticity method - Pressure find | Perumal | Main CFD Forum | 1 | September 23, 2008 14:43 |
Pressure Correction method, Finite Volume Method | Seeker01 | Main CFD Forum | 2 | January 13, 2003 02:49 |
Gas pressure question | Dan Moskal | Main CFD Forum | 0 | October 24, 2002 22:02 |