[SAM S]

Hello, I have wriiten a udf for mass source term and have also mentioned that the source applies only at the interface using vof (volume fraction cut off). I want to know the define macro for vof model,how to declare it in udf.

Thank you

[`e`]

The macro for volume of fluid is C_VOF(c,t) where the thread, t, must be a phase thread. What exactly would you like to define?

[SAM S]

Thank you for your reply. I have written the udf for mass transfer source term in a thin film evaporation that should apply at the liquid interface. While interpreting my code am getting the error label "store vof norm" not found. Here am giving the code, please help me to rectify the errors

#include "udf.h"
DEFINE_MASS_TRANSFER(liq_gas_source,cell,thread,fr om_index,from_species_index,to_index, to_species_index)
{
real m_lg;
real T_SAT = 373.15;
real vof_cutoff = 0.05;
Thread *liq = THREAD_SUB_THREAD(thread, from_index);
Thread *gas = THREAD_SUB_THREAD(thread, to_index);
m_lg = 0.0;
if ( (C_VOF(cell,thread) > vof_cutoff ) && (C_VOF(cell,thread) < (1 - vof_cutoff) ))
{
if ((m_lg == 0.0) && (C_T(cell, liq) >= T_SAT))
{
m_lg = -0.1*C_VOF(cell,liq)*C_R(cell,liq)*fabs(C_T(cell,li q)-T_SAT)/T_SAT;
}
if (C_T(cell, gas) <= T_SAT)
{
m_lg = 0.1*C_VOF(cell,gas)*C_R(cell,gas)*fabs(T_SAT-C_T(cell,gas))/T_SAT;
}
}
return (m_lg);
}

[`e`]

Try compiling the UDF instead of interpreting.

[Meisam1300]

Hello Sam
Did you solve the problem? I am encountering the same problem and I cannot solve it.
I appreciate any help
thank you in advance