energy source term for phase change
hi everyone
i'm simulating a convergingdiverging nozzle saturated water enter and because of pressure drop flow changes to two phase and the temperature decrease.for evaporation & condensation i use evaporationcondensation model in ansys fluent 13 with T_sat varying by pressure and i use a source term to add latent heat to energy equation and i use mixture model but when i run the case the fluent says : Error: FLUENT received fatal signal (ACCESS_VIOLATION) 1. Note exact events leading to error. 2. Save case/data under new name. 3. Exit program and restart to continue. 4. Report error to your distributor. Error Object: #f here is my udf's: #include "udf.h" DEFINE_PROPERTY(T_sat,c,t) { real T,p; p=(C_P(c,t)*7.501*0.001)+0.057; T=5132./(20.386log(p)); return T; } DEFINE_SOURCE (phase_change,c,t,dQ,eqn) { real a,b,Tsat,T,h,Q,p1,m_net; Thread *tm=THREAD_SUPER_THREAD(t); Thread **pt = THREAD_SUB_THREADS(tm); Thread *tp = pt[0]; /*primary phase*/ Thread *ts = pt[1]; /*secondary phase*/ p1=(C_P(c,t)*7.501*0.001)+0.057; Tsat=5132./(20.386log(p1)); T=C_T(c,t); if(200.<T<272.7) h=2835000.; /* latent heat(j/kg)*/ if(272.7<T<500.) h=(0.004*pow(T,2.)+0.492*T+2681.)*1000.; a=0.1; b=C_VOF(c,ts)*C_R(c,ts)C_VOF(c,tp)*C_R(c,tp); m_net=(a*b*(TTsat)/Tsat) /*mass transfer(kg/m3s)*/ Q=m_net*h; if(272.7<T<500.) dQ[eqn]=a*b*(h/Tsat+(0.008*T+.429)*(TTsat)/Tsat); else dQ[eqn]=a*b*h/Tsat; return Q; } 
Hi can I have your email address? I am working on evaporation condensation problem I have some question.
Thanks 
what is your question ?

Has your problem solved Mr koochaki?

All times are GMT 4. The time now is 03:33. 