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parallel implementation of DEFINE_INIT UDF not working

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Old   January 28, 2019, 16:58
Unhappy parallel implementation of DEFINE_INIT UDF not working
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I have written a UDF to initialise all the cells in my domain to a temperature of 500K; however, when I contour plot static temperature (after initialising the solution) all the cells are at the default 300K specified in the GUI.

My simulation is transient, using a pressure based solver and a partially premixed combustion model.

My end goal is to initialise the solution with a more complex temperature distribution (hence the motivation to write a UDF).

I have hooked the UDF onto "initialisation" and I am using Fluent in Parallel mode in Workbench 19.2. I have also included the mem.h header when building the library.

Here is the code:

#include "udf.h" //DEFINE macros + more
#include "mem.h" //access flow variables

// initialise the solution with temp = 500K
cell_t c;
Thread *t;
/* loop over all cell threads in the domain */

/* loop over all cells */
C_T(c,t) = 500.;
Message("first ct is %f\n", C_T(c,t));

Message("Cells should be initialised!");

Am I missing something required to make this work in parallel mode (or something else entirely)? Any insight is greatly appreciated.

Thanks in advance

The UDF behaves the exact same way when Fluent is run in Serial mode
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Old   January 28, 2019, 22:26
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AlexanderZ will become famous soon enough
in your code you have output messages
Message("first ct is %f\n", C_T(c,t));
Message("Cells should be initialized!");
did you get messages in fluent's output console?

if not, than your init macro is not hooked

user-defined -> function hooks -> initialization -> select your macro -> OK

best regards
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define_init, parallel, udf

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