|
[Sponsors] |
buoyancy force due to concentration difference |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
December 8, 2005, 10:57 |
buoyancy force due to concentration difference
|
#1 |
Guest
Posts: n/a
|
I'm confused that in my sloving problem there is a gas-moisture mixture with combined thermal and concentration force in my momentum equation. However, when I validate my problem by using a published paper which is a double diffusive cavity, I can't get the exact profiles whatever streamlin, isothermal line, and iso-concentration in aiding or opposing buoyany flow. Therefore, I begin check the pure thermal buoyancy driven flow in a square cavity, and a pure concentration byoyancy driven flow. However, in a pure thermal buoyancy driven flow, I can get a similar velocity and temperature distribution. But, in a pure concentration difference flow within a square cavity, there is no flow driven in my cavity.
Therefore, how can I turn on or add my buoyancy force due to concentration difference to get a combined gas-moisture problem when the Boussinesq approximation is valid. |
|
December 14, 2005, 06:11 |
Re: buoyancy force due to concentration difference
|
#2 |
Guest
Posts: n/a
|
As I recall the Buossinesq buoyancy force provided as an option in PHOENICS is a function of temperature difference only. Are you using this option? Or have you implemented your own buoyancy source term as a function of both temperature and concentration difference? It seems to me that you must do the latter either by use of the INFORM facility or by use of GROUND coding.
|
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Drag force difference between Solver and Post | Dre | CFX | 2 | November 21, 2008 13:02 |
Urgently Need the code of Lift force and VM force | Kai Yan | Main CFD Forum | 0 | July 16, 2008 08:07 |
MRFZonesC questions what is the mesh_V and why only Coriolis force no centrifugal force | waynezw0618 | OpenFOAM Running, Solving & CFD | 49 | April 8, 2008 05:23 |
Buoyancy production for species concentration | George Gerber | FLUENT | 1 | May 25, 2006 17:56 |
how to calculate prssure force & lift force in CFX | zaidun | CFX | 4 | March 28, 2006 03:06 |