UDF for porous media in NLTE

qwerty753 · May 15, 2009, 12:40

Hi to all!
I'm just learning how to use fluent, so i can't implement an UDF! I need some info how to solve a Porous unsteady problem in NON LOCAL THERMAL EQUILIBRIUM. I read on User guide of Fluent 6.2 that this hypotesis is not implemented in fluent!
Who can help me? Thanks a lot.

qwerty753 · May 16, 2009, 03:45

On the web i have also find a discussion in witch was written something on NLTE i hope can help you to find a solution
"Hello Sudarsan
1). Yes for transient porous media calculation the effect of porosity is taken into account in time derivative term of the species transport equation by Fluent(as for scalar equations)
2). For systems in which fluid and solid material are not in thermal equilibrium you can solve heat transfer problem using dual cell approach details of which you can find in the following tutorial
http://www.fluentusers.com/fluent/tr...to/exhaust.pdf
Hope this will help you
Regards,
Sourabh"

So i ask my self what is a a dual cell approach?

May 15, 2009, 12:40	UDF for porous media in NLTE	#1
qwerty753 New Member qwerty753 Join Date: May 2009 Posts: 16 Rep Power: 17	Hi to all! I'm just learning how to use fluent, so i can't implement an UDF! I need some info how to solve a Porous unsteady problem in NON LOCAL THERMAL EQUILIBRIUM. I read on User guide of Fluent 6.2 that this hypotesis is not implemented in fluent! Who can help me? Thanks a lot.

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May 16, 2009, 03:45		#2
qwerty753 New Member qwerty753 Join Date: May 2009 Posts: 16 Rep Power: 17	On the web i have also find a discussion in witch was written something on NLTE i hope can help you to find a solution "Hello Sudarsan 1). Yes for transient porous media calculation the effect of porosity is taken into account in time derivative term of the species transport equation by Fluent(as for scalar equations) 2). For systems in which fluid and solid material are not in thermal equilibrium you can solve heat transfer problem using dual cell approach details of which you can find in the following tutorial http://www.fluentusers.com/fluent/tr...to/exhaust.pdf Hope this will help you Regards, Sourabh" So i ask my self what is a a dual cell approach?