CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > FLUENT

UDF works in windows workstation but not in UNIX w

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

Reply
 
LinkBack Thread Tools Display Modes
Old   November 19, 2008, 18:45
Default UDF works in windows workstation but not in UNIX w
  #1
J Fernandes
Guest
 
Posts: n/a
Hi people, I seek your help. I made an udf for mass transfer, to run in parallel mode. I am transfering a substance from a phase to another, and it works in windows workstation. The substance really transfers from one phase to the other. When I perform the calculations in a UNIX cluster there is no mass transfer. I send here my UDF (everything seems to be ok):

#include "udf.h" #include "stdio.h"

DEFINE_MASS_TRANSFER(mass_transf_coef,cell,thread, from_index,from_species_index,to_index,to_species_ index) {

#if !RP_HOST

Thread *borra = THREAD_SUB_THREAD(thread,from_index) ;

Thread *co2 = THREAD_SUB_THREAD(thread,to_index) ;

real mtc = 1.2E-5 ;

real d = 2.02E-4 ;

real Re ;

real Sc ;

real Sh ;

real Sh_forced ;

real Sh_natural ;

real Gr ;

real Diff ;

real Tc = 304.1282 ;

real Roc = 467.600 ;

real Ror ;

real Vc = 3200 ;

real miu ;

real Temp ;

real Tr ;

miu = C_MU_L(cell,co2) ; /* Message("Viscosity: %g\n",miu) ; */

Temp = C_T(cell,co2) ;

Tr = Temp * pow(Tc,-1) ;

Ror = C_R(cell,co2) * pow(Roc,-1) ;

Re = C_U(cell,co2) * C_R(cell,co2) * d / miu ; /* Message("Reynolds Number: %g\n",Re) ; */

Sc = miu / (C_R(cell,co2) * Diff) ; /* Message("Schmidt Number: %g\n",Sc) ; */

Gr = d * d * d * 9.81 * C_R(cell,co2) / miu ; /* Message("Grashoff Number: %g\n",Gr) ; */

Sh = Sh_forced ; /* Message("Sherwood Number: %g\n",Sh) ; */

Sh_forced = 0.3954 * pow(Re,58/100) * pow(miu/(C_R(cell,co2)*Diff),1/3) ; /* Message("Sherwood Number: %g\n",Sh_forced) ; */

mtc = Sh * Diff / d ; /* Message("Mass Transfer Coefficient: %g\n",mtc) ; */

Diff = 2.543E-7 * Tr * (pow(Ror,-2/3) - 0.4511) * pow(1 + 44.01 / 885.47,0.5) / ((1 + pow(Vc / 93.9,1/3)) * (1 + pow(Vc / 93.9,1/3))) ; /* Message("CO2 diffusivity: %g\n",Diff) ; */

return (mtc) ;

#endif }

Can anyone shed some light on this problem, please? I have to solve this problem the soon as possible! Many thanks in advance! Best regards,

Joćo Fernandes
  Reply With Quote

Reply

Thread Tools
Display Modes

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Workstation for CFX ranjith CFX 1 February 17, 2009 17:56
Fluent/Unix vs. Fluent/Windows sjjaber FLUENT 10 January 5, 2005 17:58
CFX5 db files migration UNIX-> Windows 2000 Bart Prast CFX 6 September 16, 2002 07:22
Best sub US$ 40 000 workstation for CFD? Charles Crosby Main CFD Forum 9 April 29, 2002 02:20


All times are GMT -4. The time now is 20:59.