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Old   March 13, 2006, 04:55
Default about species transport.
  #1
shuqin
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hi,everybody!

I am modeling species transport through a wall by adding source terms at the cells adjacent to the wall.It works nice ,

however when I want to store the mass fraction of hydrogen for postprocessing using C_YI(c0,t0,hydrogen),

the counters show the value of UDM-3(C_UDMI(c,t,2)) uniform at the wall while the hydrogen mass fraction at the wall is different.

here is the code:

#include "udf.h"

#define WALL_ID 5 /* checked from boundary condition */

DEFINE_ON_DEMAND(mass_source_3d)

{

Domain *d;

Thread *ft,*t,*t0;

face_t f;

cell_t c,c0;

d = Get_Domain(1);

thread_loop_c(t,d)

{

begin_c_loop(c,t)

{

C_UDMI(c,t,0) = 0.0;

C_UDMI(c,t,1) = 0.0;

C_UDMI(c,t,2) = 0.0;

}end_c_loop(c,t)

}

thread_loop_f(t,d)

{

if(THREAD_ID(t)==WALL_ID)

{

begin_f_loop(f,t)

{

t0=THREAD_T0(t);

c0=F_C0(f,t);

C_UDMI(c0,t0,0) =1.085e-1;

C_UDMI(c0,t0,1) =1.386e-1;

C_UDMI(c0,t0,2)=C_YI(c0,t0,hydrogen)

}end_f_loop(f,t)

}

}

}
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Old   March 13, 2006, 04:59
Default Re: about species transport.
  #2
shuqin
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I suppose it should be the same conters result ,can anyone tell me what's wrong with the C_YI(c0,t0,hydrogen) ?
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Old   March 13, 2006, 22:21
Default Re: about species transport.
  #3
shuqin
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the problem I has figured out ,it because the values are different slightly and displays the same color ,when plot XY plot ,the value is different.

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Old   March 16, 2006, 13:58
Default cfd analysis for solar still
  #4
R.Manivanan
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Dear Sir,

I am M.E. student in Mepco Schlenk Engg College,Sivakasi. i have a doubt in Double condensing solar still i modeled the solar still in which i used a wick cloth covered plate in the shape of hut roof one of the ends having contact with water .It is enclosed in glass box. Water is evaporated to vapor and then it is condensed to water again at the top glass surface. For this process how to give the boundary conditions
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Old   March 16, 2006, 22:57
Default Re: cfd analysis for solar still
  #5
shuqin
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hi,R.Manivanan,I m sorry that I have not involved in dealing with the problem similar to your project and could not help you,I suggest you post it new and describle it more specificly,and hope someone would be of help!
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