[yanboliu]

Hello all:
I have a simulation that requires apolynomialTemperature at the inlet. In order to do this I have written the udf shown below and it can work well for serial operation,but when i try to load it for parallel implementation. I have found it appear error shown below.
Thanks all in advance for any help provided.


#include "udf.h"
#include "math.h"

DEFINE_PROFILE(unsteady_temperature, thread, position)
{

real t, temperature;

face_t f;

begin_f_loop(f, thread)
{
t = RP_Get_Real("flow-time");
temperature = 295.869+5.3462*pow(10,-18)*pow(t,4)-6.3431*pow(10,-13)*pow(t,3)+1.2431*pow(10,-8)*t*t+0.00042227*t;
F_PROFILE(f, thread, position) = temperature;
}
end_f_loop(f, thread)

}




cpp -I"C:\Program Files\ANSYSI~1\v140\fluent\fluent14.0.0/src" -I"C:\Program Files\ANSYSI~1\v140\fluent\fluent14.0.0/cortex/src" -I"C:\Program Files\ANSYSI~1\v140\fluent\fluent14.0.0/client/src" -I"C:\Program Files\ANSYSI~1\v140\fluent\fluent14.0.0/mult
port/src" -I. -DUDFCONFIG_H="<udfconfig-host.h>" "C:\Users\Administrator\Desktop\udf unsteady temperature s.c"
C:\\Users\\Administrator\\Desktop\\udf unsteady temperature s.c:2: math.h: No such file or directory

999999 (..\src\mpsystem.c@1173): mpt_read: failed: errno = 10054

999999: mpt_read: error: read failed trying to read 4 bytes: Invalid argument
MPI Application rank 0 exited before MPI_Finalize() with status -1073741819
The Parallel FLUENT process could not be started.

[sbaffini]

Two suggestions:

1) try to move "face_t f;" before the "real" declaration

2) try to get the flow time as "t = CURRENT_TIME;" Indeed, note that the manual suggests:

"You should not access a scheme variable using any of the RP_GET_... functions from inside
a cell or face looping macro (c_loop or f_loop). This type of communication between the
solver and cortex is very time consuming and therefore should be done outside of loops."