[loren]

Hi! I wrote this UDF for DPM mass transfer. When I try to interpret the UDF I get the error "undeclared variable" for TP_CELL(tp), and for the other macros too.
Can you help me?

#include "udf.h"
#include "dpm.h"
DEFINE_DPM_LAW(bubbled,tp,coupled)
{
cell_t c = TP_CELL(tp);
Thread *t = TP_CELL_THREAD(tp);
real temp, P, Dco2, Sc, d, ki, kh, Ci, Cinf, massrate;
temp = 288;
d = TP_DIAM(tp);
Dco2 = (1.38*pow(10.0,-23.0)*temp)/(6.0*M_PI*0.001003*pow(10.0,-10.0));
Sc=0.001003/(TP_RHO(tp)*Dco2);
if (d<0.0035)
{ki=(2+0.6*pow(Re,1./2.)*pow(Sc,1./3.))*Dco2/d;
else if(d<=0.0045 && d>0.0035)
ki=0.2838*d-0.0009121;
else
ki=2/pow(M_PI, 1./2.)*pow(Re*Sc,1./2.)*Dco2/d
}
kh=44*1000/101325*pow(2.7183,2119.05/temp-17.4141);
P = C_P(c, t);
Ci=P*kh;
Cinf=0;
massrate=M_PI*d*d*ki*(Ci-Cinf);
TP_MASS(tp)=TP_MASS(tp)-massrate*TP_DT(tp);
TP_DIAM(tp)=pow((6.0*TP_MASS(tp))/(M_PI*44*P/temp/8314),1./3.);
TP_RHO(tp)= (44*P)/(8314*temp);
}

[pakk]

Compile it.

[loren]

Hi Pakk,
When I compile it, Fluent can't read the "nmake" file.
if I just use the "dpm.h" library and interpret it, I got a parse error in config.h line 118.
How can I solve the problem?

[pakk]

Originally Posted by loren

Hi Pakk,
When I compile it, Fluent can't read the "nmake" file.
if I just use the "dpm.h" library and interpret it, I got a parse error in config.h line 118.
How can I solve the problem?

That means your fluent is not properly installed. Look for the nmake error on this forum, many questions about that, some with answers.