|
[Sponsors] |
![]() |
![]() |
#1 |
Member
Stanley John
Join Date: Sep 2018
Posts: 79
Rep Power: 8 ![]() |
Hi,
I am trying to simulate a nozzle flow of water/steam, using rhoPimpleFoam solver. I am getting cyclic fluctuations in pressure i.e pressure fields alternates every 3-4 times steps between the 2 figures. Basically the pressure does not converge. phigh.jpg plow.jpg However the velocity fields looks OK vel.jpg PHP Code:
PHP Code:
PHP Code:
Last edited by sjohn2; July 2, 2019 at 15:17. |
|
![]() |
![]() |
![]() |
![]() |
#2 |
Member
Stanley John
Join Date: Sep 2018
Posts: 79
Rep Power: 8 ![]() |
I tried solving the same problem using rhoSimpleFoam; which uses the Simple algorithm to solve for pressure field, with the same boundary conditions and the pressure field problem vanishes.
I get the pressure field as: p.jpg and the velocity field as: v.jpg The problem I need to use cavitatingFoam which is based on PIMPLE algorithm and I need to get PIMPLE running, Any suggestions? |
|
![]() |
![]() |
![]() |
![]() |
#3 |
Member
Stanley John
Join Date: Sep 2018
Posts: 79
Rep Power: 8 ![]() |
Hi,
I got the solution to work finally, the change that I made to the fvsolution file in the PIMPLE part is turn on transonic. Now the pressure plot looks like this, p.jpg and the velocity plot is, vel.jpg Does anyone have any feedback/advice in the settings for transonic/supersonic flows? Here is my fv solution PHP Code:
and fvschemes file: PHP Code:
|
|
![]() |
![]() |
![]() |
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
outlet pressure Boundary settings -velocity streamline under ambient temp.conditions | Vishnu_bharathi | CFX | 12 | November 21, 2017 07:56 |
interFoam (HELYX-OS) pressure boundary conditions | SFr | OpenFOAM Running, Solving & CFD | 8 | June 23, 2016 17:36 |
rhoPimpleFoam Initial Setup Queries for a Flow Generated due to Pressure B.C | umer.chaudrey | OpenFOAM | 1 | October 4, 2011 04:52 |
Pressure reference in cyclic interFoam | AlmostSurelyRob | OpenFOAM | 7 | February 16, 2011 10:58 |
About Pressure Field with Cyclic Boundary Conditio | Jiaying Xu | Siemens | 2 | October 4, 2001 10:11 |