[valahian1]

Hi there!
I'm trying to get the value of a variable from UDF in TUI. For this, I defined the variable in TUI:
(rp-var-define 'test_demand 0 'real #f)
I also initialized the domain with temperature = 300 K

I compiled the UDF:

#include "udf.h"
DEFINE_ON_DEMAND(demand_test)
{
Domain *d;
real tx = 1;
Thread *t;
cell_t c;
d = Get_Domain(1);
thread_loop_c(t,d)
{
begin_c_loop(c,t)
{
tx = C_T(c,t); /* get cell temperature */
}
end_c_loop(c,t)
}
Message ("Test demand = %f\n",tx);
RP_Set_Real("test_demand",tx);
}

Using rpgetvar, I expect to receive the value 300, as the message also displays:
Test demand = 1.000000
Test demand = 300.000000

Instead, I receive the value of 1, with which the tx variable was set at the beginning of the code:
> (rpgetvar 'test_demand)
1

Can you tell me where I am wrong? How could I get the current value of the tx variable?
Thanx!

[AlexanderZ]

(%rpgetvar 'test_demand)

you will recieve updated value of tx variable

howver, tx would contain the temperature value of the LAST cell in the loop

[valahian1]

Originally Posted by AlexanderZ

(%rpgetvar 'test_demand)

you will recieve updated value of tx variable

howver, tx would contain the temperature value of the LAST cell in the loop

Hello Alexander and thank you for your response!

I still get the same value, even using %rpgetvar:

> (rp-var-define 'test_demand 0 'real #f)
test_demand

;; Execute Define_on_demand, after the domain was initialized

> Test demand = 1.000000
Test demand = 325.000000

;; Try to get the variable's value

> (%rpgetvar 'test_demand)
1

I know that tx would contain the temperature value of the last cell in the loop (the entire domain was initialized with 325 K), but I'm testing the intercommunication between Fluent macros and Scheme.

[AlexanderZ]

you should send rpvar from host

RP_Set_Real("test_demand",tx);

that could be a problem

read ansys fluent customization manual to check how to define rpvar in scheme code in other way

[valahian1]

Thank you, Alexander!