|
[Sponsors] |
![]() |
![]() |
#1 |
New Member
Join Date: Sep 2019
Posts: 3
Rep Power: 7 ![]() |
Dear OpenFoam users,
I'm trying to simulate the dispersion of a plume with an initial radial velocity of around 10 m/s (the plume is expanding in all the directions). I'm working in incompressible with pimpleFoam and I've set a concentration scalar (dye), as I would have set temperature. Would you know how I can set the initial velocity of the plume? I've tried to use funkySetField but it does not work at all (it works well for a vertical initial velocity but fails when I set a radial velocity - it might be due to the fact that I try to expand something that cannot be expanded in incompressible because a negative pressure appears in the center of the plume and stop the dispersion). I've also tried to set a concentration source, as well as a velocity source or a pressure source. But it's not working neither, I don't succeed to give the initial "push". Does someone have an idea about how to solve the problem? It would be a great help to me. Thank you very much in advance, Charline |
|
![]() |
![]() |
![]() |
![]() |
#2 |
New Member
Join Date: Sep 2019
Posts: 3
Rep Power: 7 ![]() |
no idea ?
![]() |
|
![]() |
![]() |
![]() |
![]() |
#3 |
Member
Join Date: Dec 2018
Location: Darmstadt, Germany
Posts: 87
Rep Power: 8 ![]() |
Just a weird idea: Maybe you could create a spherical mesh (computational domain = space between two spheres) and set the velocity normal to the inner boundary to be 10 m/s. I think the pressure could then adapt. In 2D it would be a circle in a circle.
|
|
![]() |
![]() |
![]() |
![]() |
#4 | |
New Member
Join Date: Sep 2019
Posts: 3
Rep Power: 7 ![]() |
Quote:
Thank you for your reply. I will have a try ! I'm running out of ideas right now so thank you ![]() |
||
![]() |
![]() |
![]() |
Tags |
dispersion, pimplefoam, radial velocity |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
Simulation of radial gas turbine, Inlet velocity components | dmaz | CFX | 17 | May 19, 2019 10:45 |
serial udf to parallel udf | radioss | Fluent UDF and Scheme Programming | 10 | January 19, 2019 09:56 |
finding radial velocity using continuity equation | bala_gk1988 | OpenFOAM Programming & Development | 0 | October 13, 2017 09:37 |
VELOCITY vs VELOCITY IN STN FRAME vs RELATIVE VELOCITY | everest20 | FLUENT | 1 | July 13, 2015 09:35 |
Axial, Radial, Tangental velocity in FLUENT post | Barri | FLUENT | 2 | March 6, 2008 21:29 |