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July 28, 2005, 21:36 |
UDF (write a data file) problem
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#1 |
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Hi, all:
I am modeling a liquid drop movement on a surface and need to calculate the mass of the liquid drop. Therefore, I wrote a UDF, (actually a DEFINE_RW_File Macro) and try to save a data file. The code seemed to work, no any problem was showed during compiling or interpreting, however, I can not see any data file was saved, The mmanual says that once I save a data file, the UDF will work and a data file shoula be saved? Am I right? Therfore, my question is: How to run a DEFINE_RW_FILE udf? would a data file be saved once the udf works properlly? Thanks very much for your help and suggestion Lichun Dong The followed is my code. #include "udf.h" DEFINE_RW_FILE(weight_center, filep) Domain *d { face_t f; cell_t c; Thread *t; d = Get_Domain(1); /* Get the domian using Fluent utility */ real volume; real vol_tot = 0; real position[ND_ND],x,y,z; real xadjvol = 0; real yadjvol = 0; real zadjvol = 0; real xcenter; real ycenter; real zcenter; real flowt; real vowater; /* Loop over all cell threads in the domian */ thread_loop_c(t,d) { /* Loop over all cells */ begin_c_loop(c, t) { volume = C_VOLUME(c,t); vowater = C_VOF(c, t[1]); vol_tot =+ volume*vowater; C_CENTROID(position, c, t); x = position(0); y = pisition(1); z = position(2); xadjvol = xadjvol + x*vowater*volume; yadjvol = yadjvol + y*vowater*volume; zadjvol = zadjvol + z*vowater*volume; } end_c_loop(c,t); xcenter = xadjvol/vol_tot; ycenter = yadjvol/vol_tot; zcenter = zadjvol/vol_tot; flowt = RP_GET_Real("flow-time"); fprintf(filep, "%d", flowt, "%d", xcenter, "%d", ycenter, "%d", zcenter); } } |
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July 29, 2005, 04:16 |
Re: UDF (write a data file) problem
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#2 |
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As I understand the UDF manual, the DEFINE_RW_FILE macro does not by itself write or read any files. It only determines, what additional information is written/read to/from the case or data files that you write/read yourself manually or in a script.
Maybe as you set up a small test model and write the case/data file in clear text (not binary), you can inspect the files to see if your data is written. I haven't used this macro myself yet though. |
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July 29, 2005, 12:39 |
Re: UDF (write a data file) problem
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#3 |
Guest
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Hi,
Thank you for your response. Have you used DEFINE_ON_DEMAND and save data using C_UDMI? I will be very appreciated if anyone can give me some advice. Lichun dong |
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