Check for the Boundary types in UDF
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Sometimes it becomes necessary to modify/ operate on a specific type of boundaries dynamically i.e., during the runtime. For this purpose we need to retrieve the type of boundary in an UDF.
Boundary Type Macro Wall THREAD_F_WALL Interior THREAD_F_INTERIOR Symmetry THREAD_F_SYMMETRIC Periodic THREAD_F_PERIODIC Mass Flow Inlet THREAD_F_MFINLET Pressure Inlet THREAD_F_PINLET Pressure Outlet THREAD_F_POUTLET Pressure Farfield THREAD_F_PFAR Velocity Inlet THREAD_F_VINLET Outflow THREAD_F_OUTFLOW An UDF to print Area weighted average Temperature and the Mass flow rate at Pressure outlet boundary. #include "udf.h" DEFINE_ON_DEMAND(Data_out) { Thread *t; face_t f; Domain *domain; real temp,atemp=0.,area,tarea=0.,flow=0.; domain= Get_Domain(1); thread_loop_f(t, domain) { if(THREAD_TYPE(t)==THREAD_F_POUTLET) { begin_f_loop(f, t) { area= F_AREA(A,f,t); temp=F_T(f,t); atemp+=F_T(f,t)*area; tarea+=area; flow+= F_FLUX(f,t); } end_f_loop(f, t) atemp/=tarea; int zone_ID = THREAD_ID(t); Message('Area Weighted Average Temperature on zone ID %d is %g', zone_ID,atemp); Message('Mass Flow rate is %g Kg/s',flow); atemp=0.; tarea=0.; flow=0.; } } } |
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