|
[Sponsors] |
January 14, 2020, 10:05 |
Full porous model
|
#1 |
Member
Lucas
Join Date: May 2019
Posts: 41
Rep Power: 6 |
What is the difference between adding a solid material in solid definitions and not adding it when using the Full Porous Model? So far, I've done simulations that have mass transfer between my multi component phase and the solid, but I didn't used any material in solid definition. If I want to add a material the settings asks for fluid solid area density (which I don't know how to calculate). So I'm wondering what does CFX "understand" when we add a material and when we don't.
In addition, when I add a source term to mass fraction, the equation is similar to the ones defined for Additional Variable? Thanks in advance |
|
January 14, 2020, 11:02 |
|
#2 |
Senior Member
Join Date: Jun 2009
Posts: 1,804
Rep Power: 32 |
A porous model is understood in ANSYS CFX as a fluid moving through a solid matrix.
If there is physics interaction between fluid and the solid beyond just the drag/friction, you must specify which physics you want to model in the solid matrix. Not certain what physics you have modeled using a multicomponent approach, but certainly not between the solid matrix and the fluid since a multi-component approach cannot model the relative velocity between the fluid and the solid. |
|
January 15, 2020, 08:19 |
|
#3 | |
Member
Lucas
Join Date: May 2019
Posts: 41
Rep Power: 6 |
Quote:
|
||
January 15, 2020, 08:30 |
|
#4 |
Senior Member
Join Date: Jun 2009
Posts: 1,804
Rep Power: 32 |
ANSYS CFX full porous model implementation is fundamentally a multi-phase implementation where
1 - the velocity field is algebraically imposed (mostly stationary) 2 - the volume fraction is also fixed 3 - forces between the fluid and the solid are represented by the resistance model. Keep in mind that any component removed from the fluid mixture does not go into the solid matrix by any means UNLESS you are modeling the solid phase explicitly Please have a closer look at the documentation, and how the equations are formulated to understand the models. You can also compare the literature about full porous models obtained from the "volume averaging approach" and you can then make your own conclusions. At the end, what matters is that you got a "porous model" framework to customize for your specific needs. Every porous model is different depending on your application. There are some that are well established because they represent common use cases. |
|
March 15, 2020, 20:10 |
|
#5 | |
Member
Lucas
Join Date: May 2019
Posts: 41
Rep Power: 6 |
Quote:
|
||
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Effective thermal conductivity in Full Porous Model | Ev Fa | CFX | 0 | February 2, 2016 07:16 |
Porous artery and SST turbulence model | kmgraju | CFX | 13 | June 11, 2013 00:50 |
porous filtration membrane area in model | catherina | CFX | 3 | October 27, 2011 06:05 |
How to use radiation model with porous model? | jacky | CFX | 0 | December 17, 2002 22:51 |
How to model a full 3-D cylinder in cfx44? | S. Ding | CFX | 1 | June 26, 2002 11:32 |