[Weijia Qian]

Hi, i hope anyone could help me or give me some advices.

The problem is: I create a surface injection in GUI, and the flow is unsteady and particle tracking is also unsteady. Then i want to change the particle temperature through UDF. the UDF can be built, loaded and hooked, but it does no change to the particle temperature at all. I also tried a DEFINE_ADJUST, and the problem is same.

the UDF is:
#include "udf.h"

DEFINE_DPM_INJECTION_INIT(particle, I)
{

Particle *p;
Message("Initializing Injection qwj: %s\n",I->name);


loop(p,I->p_init)
{
P_INIT_TEMP(p)=1500;
P_T(p)=1400;
}

}

[`e`]

This approach should work fine (both the DEFINE_DPM_INJECTION_INIT and DEFINE_ADJUST macros). Are you sure this macro is being called correctly? Try printing a message to the screen within the loop including the particle ID:

Message("Particle ID = %d\n",p->part_id);

[Weijia Qian]

Originally Posted by `e`

This approach should work fine (both the DEFINE_DPM_INJECTION_INIT and DEFINE_ADJUST macros). Are you sure this macro is being called correctly? Try printing a message to the screen within the loop including the particle ID:

Message("Particle ID = %d\n",p->part_id);

Thanks your help.
I tried, and there is no message show the particle ID. When build the UDF, it shows that warning C4113: void (*)() and void (*)(void) have different parameter list.
I think UDF cannot create a particle when we need one in the solving process via UDF, so i have turned to OpenFOAM.

[pakk]

Originally Posted by Weijia Qian

Thanks your help.
I tried, and there is no message show the particle ID.

That means your code is not run. Something is wrong in the way you built or hooked the code.

I think UDF cannot create a particle when we need one in the solving process via UDF,

I am not saying that this conclusion is wrong, but you can not base this on the things you tried before. Your code was not executed, so nothing you could have possibly written in the code had any effect.

so i have turned to OpenFOAM.

Well, OpenFoam certainly is more flexible than Fluent. But you will encounter more problems similar to the one above, and if you give up so quickly, you will not get anywhere...

[Weijia Qian]

Originally Posted by pakk

That means your code is not run. Something is wrong in the way you built or hooked the code.


I am not saying that this conclusion is wrong, but you can not base this on the things you tried before. Your code was not executed, so nothing you could have possibly written in the code had any effect.


Well, OpenFoam certainly is more flexible than Fluent. But you will encounter more problems similar to the one above, and if you give up so quickly, you will not get anywhere...

thanks, i hook the UDF in the UDF tab of the injection.