关于水蒸气的相变udf方程
请教各位大神,我在百度上找到了水蒸气的相变udf,放到我的模型中后,水蒸气在溶液区域冷凝放热,溶液区域温度升高过快,是正确温升的五百倍左右,请问除了改相变潜热以外还有什么解决方案?因为改了相变潜热之后物理意义就不正确了
#include "udf.h"
#include "sg_mphase.h"
#define T_SAT 373
#define LAT_HT 2640000
end_f_loop(f,thread)
}
DEFINE_SOURCE(liq_src, cell, pri_th, dS, eqn)
{
Thread *mix_th,*sec_th;
real m_dot_l;
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_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]=-0.1*C_R(cell,pri_th)*fabs(C_T(cell,mix_th)-T_SAT)/T_SAT;
}
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]=0.0;
}
return m_dot_l;
}
DEFINE_SOURCE(vap_src,cell,sec_th,dS,eqn)
{
Thread *mix_th,*pri_th;
real m_dot_v;
mix_th=THREAD_SUPER_THREAD(sec_th);
pri_th=THREAD_SUB_THREAD(mix_th,0);
if(C_T(cell, mix_th)>=T_SAT)
{
dS[eqn]=0.;
}
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]=-0.03141*C_R(cell,sec_th)*fabs(C_T(cell,mix_th)-T_SAT)/T_SAT;
}
return m_dot_v;
}
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,mix_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;
}@wuming524@wuming524@wuming524 返回小木虫查看更多
我的建议是你先查一下物理化学或者化工热力学,找到相变的物理过程方程
development of pressure-based phase change model for CFD modeling of heat pipes, 建议研读这篇论文
,