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[求助] 做水冷凝结果不对，请教大神UDF哪里出错了？已有1人参与

我现在正在学习水冷凝的UDF，然后上网找了例子模拟，发现结果出错，但是不知道错在哪里。恳求各位大神指正
模拟的参数如下：水蒸汽以400度进入管道，管道壁面温度为283度，水蒸汽的速度为0.1m/s。管径为0.05m，长度为3m。
#include "udf.h"
#include "sg_mphase.h"
#define T_SAT 373
#define LAT_HT 2.257e6

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, pri_th)*C_R(cell, pri_th)*
            fabs(C_T(cell, pri_th) - T_SAT)/T_SAT;
dS[eqn] = 0.1*C_R(cell, pri_th)*
   fabs(C_T(cell, pri_th) - T_SAT)/T_SAT;
                           }
  else {
m_dot_v = -0.1*C_VOF(cell, sec_th)*C_R(cell, sec_th)*
            fabs(T_SAT-C_T(cell,mix_th))/T_SAT;

dS[eqn] = 0.;

   }

  return m_dot_v;

}

DEFINE_SOURCE(lip_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, pri_th)*C_R(cell, pri_th)*
            fabs(C_T(cell, mix_th) - T_SAT)/T_SAT;
dS[eqn] = 0.;
                           }
  else {
m_dot_l = -0.1*C_VOF(cell, sec_th)*C_R(cell, sec_th)*
            fabs(T_SAT-C_T(cell,mix_th))/T_SAT;

dS[eqn] = -0.1*C_R(cell, sec_th)*
   fabs(C_T(cell, sec_th) - T_SAT)/T_SAT;

   }

  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, pri_th)*C_R(cell, pri_th)*
            fabs(C_T(cell, pri_th) - T_SAT)/T_SAT;

dS[eqn] =  0.1*C_VOF(cell, pri_th)*C_R(cell, pri_th)/T_SAT;
                           }

  else {
m_dot = -0.1*C_VOF(cell, sec_th)*C_R(cell, sec_th)*
            fabs(T_SAT-C_T(cell,mix_th))/T_SAT;

dS[eqn] = -0.1*C_VOF(cell, sec_th)*C_R(cell, sec_th)/T_SAT;}

  return LAT_HT*m_dot;
}

这个是计算66s后的气相体积分数，根本看不到有水滴行程