|
[Sponsors] |
![]() |
![]() |
#1 |
Guest
Posts: n/a
|
Hello Friends,
I am Vamsee, doing my M.Tech at IIT Kharagpur.Presently I a doing my project on Metal Hydride Hydrogen compressors. For my project I need to simulate a metal hydride bed (packed porous bed) with heat transfer.I am facing problem while writing UDF for source term in the energy equation. I will explain my problem statement clearly so that anyone one could help me solving my problem. The source term goes like this. S= density*dH*N/(2*Mol wt)* (dx/dt) where dH,N,density are all constants and doesn't depend on temperature. x= hydrogen concentration t = time dx/dt = 1000*A*(x-xf)/B* exp(-Ea/(R*T)) B = xi-xf xi= Initial concentration of hydrogen in metal hydride = fixed value xf-final hydrogen concentration in metal hydride = fixed value ( can be initialized before the problem) A= (Pb-Peq)/Peq Pb=constant Peq=(dH/(R*T)) +constant Ea= constant T=Temperature I am unable to write UDF for the source term as I am finding difficulty with the hydrogen concentration term x Can I use UDS in this case? I hope u got the problem. Please Help me. Thanks in advance. |
|
![]() |
![]() |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
Free media&porous media.Big changes in properties. | Isi | Main CFD Forum | 1 | July 14, 2008 07:18 |
porous media | mikezhang | Phoenics | 2 | September 21, 2002 21:10 |
Porous baffle and porous media | Jan | Siemens | 0 | June 8, 2002 09:23 |
Porous media | James Hampson | FLUENT | 1 | January 12, 2001 12:29 |
Porous media | Alberto | FLUENT | 4 | July 20, 2000 05:47 |