[SJTUmoyu]

Please help me! When I start my UDF program, there is an error "rpgetvar: part/charge-rate: undefined variable". What's wrong with it?

[yanghai]

Originally Posted by SJTUmoyu

Please help me! When I start my UDF program, there is an error "rpgetvar: part/charge-rate: undefined variable". What's wrong with it?

you should talk about your model and what you want to do, and put your udf on. because we know nothing about you want to do.

[SJTUmoyu]

Originally Posted by yanghai

you should talk about your model and what you want to do, and put your udf on. because we know nothing about you want to do.

Thank you. In dpm model, I want to charge particles.
I should know the charge rate of particles. I used "RP_Get_Real(part/charge-rate)" to get parameter. But when I start my udf program. An error appeared. "rpgetvar: part/charge-rate: undefined variable". So I wonder whether I should define the variable of "part/charge-rate" and how to define it.
Following is my partial udf about "RP_Get_Real".

#include "udf.h"
#include "sg_udms.h"
#include "charge_udf.h"

Domain *fl_domain=NULL;
real epsilon_0=8.854e-12;
real d_charge=0.;
real charge_max=0.;

/*
* Get charge parameters (set via Scheme)
*/

void get_charge_parameters(void)
{
d_charge=RP_Get_Real("part/charge-rate");
charge_max=RP_Get_Real("part/charge-max");
}

[yanghai]

Originally Posted by SJTUmoyu

Thank you. In dpm model, I want to charge particles.
I should know the charge rate of particles. I used "RP_Get_Real(part/charge-rate)" to get parameter. But when I start my udf program. An error appeared. "rpgetvar: part/charge-rate: undefined variable". So I wonder whether I should define the variable of "part/charge-rate" and how to define it.
Following is my partial udf about "RP_Get_Real".

#include "udf.h"
#include "sg_udms.h"
#include "charge_udf.h"

Domain *fl_domain=NULL;
real epsilon_0=8.854e-12;
real d_charge=0.;
real charge_max=0.;

/*
* Get charge parameters (set via Scheme)
*/

void get_charge_parameters(void)
{
d_charge=RP_Get_Real("part/charge-rate");
charge_max=RP_Get_Real("part/charge-max");
}

are you sure you can complied the udf successful? there is no DEFINE macro? i know a little about the dpm model.but i think it must have DEFINE macro in any udf. or, part/charge-rate may not is a parameter in fluent, it is why to occur the error.

[AlexanderZ]

where did you get this code?

inside your "own" code there is a comment

/* 
* Get charge parameters (set via Scheme)
*/

it tells that rp-vars should be set through scheme

best regards

[SJTUmoyu]

Originally Posted by yanghai

are you sure you can complied the udf successful? there is no DEFINE macro? i know a little about the dpm model.but i think it must have DEFINE macro in any udf. or, part/charge-rate may not is a parameter in fluent, it is why to occur the error.

yes! I have defined macro. The udf I showed is just a partial udf. The error occurs due to this udf.

[SJTUmoyu]

Originally Posted by AlexanderZ

where did you get this code?

inside your "own" code there is a comment

/* 
* Get charge parameters (set via Scheme)
*/

it tells that rp-vars should be set through scheme

best regards

Do you mean that "part/charge-rate" should be defined through scheme?
And can you tell me how to define vars through scheme?
Thank you very much !

[pakk]

And did you compile (do this!) or interpret (don't do this!)?

[SJTUmoyu]

Originally Posted by pakk

And did you compile (do this!) or interpret (don't do this!)?

Yes,I have compiled it successfully.