[jhlee9622]

Hi, guys.

Now, I'm using DEFINE_DPM_OUTPUT Macro for exporting particle information
(ex: Particle position, velocity, time, et al.)

First one, UDF code about particle x-position and x-velocity was made for test and compiled in fluent. This UDF was hooked by "Sample trajectories" in fluent. The plane and injection were selected in Sample trajectories, and after that I was computed.

After computing is finished, .dpm file was created in fluent working folder. In this file, however, there was no particle information. Just empty file.

There was no error during compiled UDF or computed by Sample trajectories. What's the problem in my simulation?

My UDF coding was attached below. Thank you.



#include "udf.h"

DEFINE_DPM_OUTPUT(PSI_C_method, header, fp, p, t, plane)
{
#if RP_PARALLEL
if(header)
{
par_fprintf_head(fp, " x u ");
}
if(NULLP(p))
return;

par_fprintf(fp, "%f %f \n", P_POS(p)[0], P_VEL(p)[0]);

#endif
}

[jhlee9622]

Is there anyone who know this problem?

[gush]

Hi jhlee!
Can you explain the solution if you solved it! I have exactly the same problem. Thank you!


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[swpnl9282@gmail.com]

Hi jhlee
Please store no. Of memory location

Sent from my Moto G (4) using CFD Online Forum mobile app

[gush]

Originally Posted by swpnl9282@gmail.com

Hi jhlee
Please store no. Of memory location

Sent from my Moto G (4) using CFD Online Forum mobile app

it is needed to use user defined memory locations then?

in which cases do we need to use UDMs? this is little bit confusing for newbies like me to be honest!