各位大神,我在做一个空气冷凝的模拟,目前采用了水蒸气的冷凝udf,加一个组分运输模型,设置空气中水蒸气质量分数,但湿度结果有问题,求指导
qq578376674
udf
#include"udf.h"
#include "sg_mphase.h"
#define T_SAT 373.15
#define LAT_HT 2.2e6
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);
if(C_T(cell, mix_th)>=T_SAT)
{
m_dot_v=0.1*C_VOF(cell,sec_th)*C_R(cell,sec_th)*fabs(C_T(cell,mix_th)-T_SAT)/T_SAT;
dS[eqn]=0;
}
else
{
m_dot_v=-0.1*C_VOF(cell,pri_th)*C_R(cell,pri_th)*fabs(T_SAT-C_T(cell,mix_th))/T_SAT;
dS[eqn]=-0.1*C_R(cell,pri_th)*fabs(C_T(cell,mix_th)-T_SAT)/T_SAT;
}
return m_dot_v;
}
DEFINE_SOURCE(liq_src, cell, sec_th, dS, eqn)
{
Thread *mix_th,*pri_th;
real m_dot_l;
mix_th=THREAD_SUPER_THREAD(sec_th);
pri_th=THREAD_SUB_THREAD(mix_th,0);
if(C_T(cell,mix_th)>=T_SAT)
{m_dot_l=-0.1*C_VOF(cell,sec_th)*C_R(cell,sec_th)*fabs(C_T(cell,mix_th)-T_SAT)/T_SAT;
dS[eqn]=-0.1*C_R(cell,sec_th)*fabs(C_T(cell,mix_th)-T_SAT)/T_SAT;
}
else
{
m_dot_l=0.1*C_VOF(cell,pri_th)*C_R(cell,pri_th)*fabs(T_SAT-C_T(cell,mix_th))/T_SAT;
dS[eqn]=0.;
}
return m_dot_l;
}
DEFINE_SOURCE(enrg_src,cell,mix_th,dS,eqn)
{
Thread *pri_th,*sec_th;
real m_dot;
pri_th=THREAD_SUB_THREAD(mix_th,0);
sec_th=THREAD_SUB_THREAD(mix_th,1);
if(C_T(cell, mix_th)>=T_SAT)
{
m_dot=-0.1*C_VOF(cell,sec_th)*C_R(cell,sec_th)*fabs(C_T(cell,mix_th)-T_SAT)/T_SAT;
dS[eqn]=-0.1*C_VOF(cell,sec_th)*C_R(cell,sec_th)/T_SAT;
}
else
{
m_dot=0.1*C_VOF(cell,pri_th)*C_R(cell,pri_th)*fabs(T_SAT-C_T(cell,mix_th))/T_SAT;
dS[eqn]=0.1*C_VOF(cell,pri_th)*C_R(cell,pri_th)/T_SAT;
}
return LAT_HT*m_dot;
} |