[zakmt293]

Hy guys I am simulating flow boiling and the geometry is 2-dimensional with micro channel. Can someone help me that which UDF would be better for such simulation in these two. Your response would serve as a guidance for me Thank You

#include "udf.h"
#include "sg_mphase.h"
#define T_SAT 373
#define LAT_HT 2455.1345e3
DEFINE_SOURCE(vap_src, cell, pri_th, dS, eqn)
{
Thread *mix_th, *sec_th;
real m_dot_v;
mix_th = THREAD_SUPER_THREAD(pri_th);
sec_th = THREAD_SUB_THREAD(mix_th, 1);
/*m_dot_v=0.;*/
if(C_T(cell, mix_th)>=T_SAT)
{
m_dot_v = 0.1*C_VOLUME(cell, sec_th)*C_R(cell, sec_th)*fabs(C_T(cell, sec_th) - T_SAT)/T_SAT;

dS[eqn] = 0.;
}
return m_dot_v ;
}

Second one
#include "udf.h"
#define T_SAT 373.8
#define LAT_HT 2455e3
#define k_eff 0.05
#define dx 0.05e-3
DEFINE_SOURCE(vap_src,cell,th,dS,eqn) /*vapor source*/
{
real m_v;
m_v=0.0;
if (C_T(cell,th)>T_SAT)
{
m_v=k_eff*(C_T(cell,th)-T_SAT)/(LAT_HT*C_VOLUME(cell,th));
dS[eqn]=0;
}
return m_v;
}

[vivek162]

are you simulating two-phase closed thermosyphon using VOF model?