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[求助]
关于冷凝UDF 已有2人参与
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 找到的网上的关于水的冷凝UDF 如下#include "udf.h" #include "sg_mphase.h" #define T_SAT 373.15 #define LAT_HT 2260000 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 = 100*C_VOF(cell, sec_th)*C_R(cell, sec_th)*fabs(C_T(cell, mix_th)-T_SAT)/T_SAT; dS[eqn] = 100*C_R(cell, sec_th)*fabs(C_T(cell, mix_th)-T_SAT)/T_SAT; } else { m_dot_v = -100*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_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 = 100*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 = -100*C_VOF(cell, sec_th)*C_R(cell, sec_th)*fabs(T_SAT-C_T(cell,mix_th))/T_SAT; dS[eqn] = -100*C_R(cell, sec_th)* fabs(C_T(cell, mix_th)-T_SAT)/T_SAT; } return m_dot_l; } DEFINE_MASS_TRANSFER(lic_gas_source,cell,thread,from_index,from_species_index,to_index,to_species_index) { Thread *gas, *liq; real m_1g; gas=THREAD_SUB_THREAD(thread,from_index); liq=THREAD_SUB_THREAD(thread,to_index); m_1g=0.; if(C_T(cell,liq)>=T_SAT) m_1g=100*C_VOF(cell,liq)*C_R(cell,liq)*fabs(C_T(cell,liq)-T_SAT)/T_SAT; else { m_1g=100*C_VOF(cell,gas)*C_R(cell,gas)*fabs(T_SAT-C_T(cell,gas))/T_SAT; } return m_1g; } 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 = -100*C_VOF(cell, sec_th)*C_R(cell, sec_th)*fabs(C_T(cell, mix_th)-T_SAT)/T_SAT; dS[eqn] = -100*C_VOF(cell, sec_th)*C_R(cell, sec_th)/T_SAT; } else { m_dot = 100*C_VOF(cell, pri_th)*C_R(cell, pri_th)*fabs(T_SAT-C_T(cell,mix_th))/T_SAT; dS[eqn] = 100*C_VOF(cell, pri_th)*C_R(cell, pri_th)/T_SAT; } return LAT_HT*m_dot; } 有几个问题， 第一在mass_tansfer中 if(C_T(cell,liq)>=T_SAT) m_1g=100*C_VOF(cell,liq)*C_R(cell,liq)*fabs(C_T(cell,liq)-T_SAT)/T_SAT; else { m_1g=100*C_VOF(cell,gas)*C_R(cell,gas)*fabs(T_SAT-C_T(cell,gas))/T_SAT; } m_1g这个的符号都是正号码？？ 还有一个问题是应用这个UDF计算后，不应该低于373K的时候不应该就是液相了么，但是仿真算出来虽然有相变， 但是气相区域还存在许多低于373K的区域，，， 求UDF 大神指点 |
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