# Porous Media UDF

 Register Blogs Members List Search Today's Posts Mark Forums Read

 February 26, 2009, 02:03 Porous Media UDF #1 Vamsee 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.

 February 26, 2009, 04:46 Re: Porous Media UDF #2 Minguez Guest   Posts: n/a There are some information in the Fluent page as a tutorial called "Modeling Flow and Heat transfer in Packed Bed Reactor" and a pdf of Heat Transfer in Porous Media that can help you.

 February 26, 2009, 07:30 Re: Porous Media UDF #3 Vamsee Guest   Posts: n/a Thank u But I could not find it.Can you please help me.

 March 1, 2009, 21:17 Re: Porous Media UDF #4 Minguez Guest   Posts: n/a The tutorial is "Modeling Flow and Heat transfer in Packed Bed Reactor" and it is in the Intermediate/advanced tutorials section

 March 1, 2009, 23:45 Re: Porous Media UDF #5 Vamsee Guest   Posts: n/a I am usinf FLEUENT 6.2.16. I am unable to access to the tutorial which you mentioned.Can you please help me.

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post Isi Main CFD Forum 1 July 14, 2008 07:18 mikezhang Phoenics 2 September 21, 2002 21:10 Jan CD-adapco 0 June 8, 2002 09:23 James Hampson FLUENT 1 January 12, 2001 13:29 Alberto FLUENT 4 July 20, 2000 05:47

All times are GMT -4. The time now is 18:00.