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-   -   Modeling heat transfer through a porous media (http://www.cfd-online.com/Forums/main/76733-modeling-heat-transfer-through-porous-media.html)

harimighty June 2, 2010 15:13

Modeling heat transfer through a porous media
 
Hello,

I am a beginner, I am trying to model heat transfer through a porous medium.
I am modeling a cuboid in the design modeller, meshing it there and importing it into fluent.I am then modeling the fluid cell as a porous zone with given porosity and imposing the boundary conditions which include uniform heat flux on one surface and all the other surfaces adiabatic and velocity inlet boundary condition as well.
The heat flux does not seem to have any effect on the porous media, I am getting unform temperature contours through out the model.

Can some one tell me if I am doing the modeling right.

Thanks,
Harimighty.

vishyaroon June 2, 2010 17:08

Couple of related questions/comments:

1. What values of porosity are you using?
2. I have tried using porous media with a wall temperature too. Compared to such a case, my (limited) experience showed that using a heat source/sink workes better in porous media.

Rami June 3, 2010 02:46

Quote:

Originally Posted by harimighty (Post 261444)
Hello,

I am a beginner, I am trying to model heat transfer through a porous medium.
I am modeling a cuboid in the design modeller, meshing it there and importing it into fluent.I am then modeling the fluid cell as a porous zone with given porosity and imposing the boundary conditions which include uniform heat flux on one surface and all the other surfaces adiabatic and velocity inlet boundary condition as well.
The heat flux does not seem to have any effect on the porous media, I am getting unform temperature contours through out the model.

Can some one tell me if I am doing the modeling right.

Thanks,
Harimighty.


I had a somewhat similar problem in FLUENT, and could not get any satisfactory reply. Please refer to the following threads:
  • http://www.cfd-online.com/Forums/fluent/64958-including-radiation-when-temperature-expressed-uds-porous-media.html
  • http://www.cfd-online.com/Forums/fluent/48421-fluent-radiation-porous-media.html.
I'd like to hear whether and how it is indeed possible to treat a porous medium having two distinct temperatures (one for the fluid and one for the solid) and enabling heat transfer in it by convection (and also radiation and conduction).
PS: It would be better for you to post in the FLUENT forum than the present one.


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