 |
 |
 |
|
|
|
[Sponsors] | ||||
July 27, 2004, 19:36
|
Question on boundary conditions
|
#1 |
|
Guest
Posts: n/a
|
I'm using SIMPLE method and have a doubt on physical BC's.
For pressure, on has to make the gradient normal to the wall equal zero, but how to calculate the pressure of the fluid cell close to it? In order to calculate the pressure of a cell (I'm using poisson) I'm supposed to use the values of pressure around the cell. Does it include boundary cells? The problem is that I'm reaching very high pressure values close to the walls. |
|
|
||
|
July 27, 2004, 21:26
|
Re: Question on boundary conditions
|
#2 |
|
Guest
Posts: n/a
|
refer to 'Numerical methods for Fluid flow and heat transfer' by Suhas V Patankar. The book explains the answer in great details...
|
|
|
|
||
|
July 28, 2004, 15:26
|
Re: Question on boundary conditions
|
#3 |
|
Guest
Posts: n/a
|
I'll look for that one. Thank you.
|
|
|
|
||
|
July 29, 2004, 12:17
|
Re: Question on boundary conditions
|
#4 |
|
Guest
Posts: n/a
|
1) To calculate the pressure values near the boundaries you should include the unknown boundary cells.
2) To treat boundary, you can have a look at the way it is done in FISHPACK which is an elliptic equation solver. http://www.scd.ucar.edu/css/software...ck/technote.ps |
|
|
|
||
 |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| Domain Imbalance | HMR | CFX | 5 | October 10, 2016 05:57 |
| non reflective boundary conditions for incompresible flow | Pascal_doran | OpenFOAM Programming & Development | 16 | August 25, 2015 05:35 |
| Implementation of boundary conditions for FVM | Tom | Main CFD Forum | 7 | August 26, 2014 05:58 |
| question about implementing boundary conditions | saygin | Main CFD Forum | 0 | July 6, 2006 07:08 |
| A problem about setting boundary conditions | lyang | Main CFD Forum | 0 | September 19, 1999 18:29 |
Linear Mode
