UDF for Permeability in Porous Media

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 January 18, 2004, 22:36 UDF for Permeability in Porous Media #1 solomon Guest   Posts: n/a What is the udf for permeability or viscous resistance in Fluent 6.1?

 January 18, 2004, 23:41 Re: UDF for Permeability in Porous Media #2 Umesh Guest   Posts: n/a #include "udf.h" #include "sg.h" #define R1soil 8e13 /* Resistances */ #define R2soil 2e13 /* Define Resistences */ DEFINE_PROFILE(one_res, thread, np) { cell_t c; real x[ND_ND]; real y; begin_c_loop (c,thread) { C_CENTROID(x,c,thread); y =x[1]; if ((y

=h2) || (y

=h4) || (y

=h6 ) ) F_PROFILE(c,thread,np) = R1soil; else if ((y

=h3) || (y

=h5) || (y

 January 20, 2004, 02:53 Re: UDF for Permeability in Porous Media #3 solomon Guest   Posts: n/a What is the h's (h2,h3,h4,h5,h6) stand for? Thank you

 January 20, 2004, 05:24 Re: UDF for Permeability in Porous Media #4 Umesh Guest   Posts: n/a THis is UDF for a Packed column.. h1..h2.are column heights..i.e. distance along height...the udf specifies resistances for two layers of packings.. i had used it successfully hope this helps.. by -Umesh

 January 20, 2004, 15:49 Re: UDF for Permeability in Porous Media #5 co2 Guest   Posts: n/a is there some syntax error in the last 2-3 lines of the code given by Umesh?

 January 20, 2004, 23:38 Re: UDF for Permeability in Porous Media #6 umesh Guest   Posts: n/a hi the code is correct... but some symbols were not displyed... just refer to this one --The Code----------- #include "udf.h" #include "sg.h" #define R1soil 8e13 /* Resistances */ #define R2soil 2e13 #define h1 1.8 #define h2 0.3 /* Define Resistences */ DEFINE_PROFILE(one_res, thread, np) { cell_t c; real x[ND_ND]; real y; begin_c_loop (c,thread) { C_CENTROID(x,c,thread); y =x[1]; if (y less than h1 and and y greater than= h2) F_PROFILE(c,thread,np) = R1soil; else if (y less than h2) F_PROFILE(c,thread,np) = R1graval; } end_c_loop (c,thread) }

 August 9, 2012, 12:05 #7 New Member   kaci fodil Join Date: Aug 2012 Posts: 8 Rep Power: 4 hello what is the viscous resistance in multiphase flow throw a porous medium for each phase (oil-water) , give the udf for each of them please

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