[lukaszrze]

Hello,

I have a problem with my UDF because I cannot see it when I click on the arrow on the right of the textbox - where you can see options: constant, expression, parameters, (here should be the possibility to click on the loaded UDF).

I have even instaled Visual studio for the compilation of the UDF because before that i had an error
"The UDF library you are trying to load (libudf) is not compiled for parallel use on the current platform (win64)"
that problem is gone now, I get a nice answer in the console ofter clicking "BUILD" and "LOAD" that fluent is opening the library. When I click User Defined -> Functions -> Manage I can see the UDF is loaded.

I will be very gratefull for your help. thank you

[AlexanderZ]

most macros should be hooked in User-defined -> function hook
profiles should be hooked as boundary conditions
sources -> as sources in cell zone conditions

show you UDF if this not helps

best regards

[lukaszrze]

Thank you for your answer!

Unfortunately when when I click on the user-defined->function hooks nothing is active there (I have my UDF loaded)

For now I have a UDF written to control the velocity of the profile in 2D cycloturbine (I plan to change it to control the position - but I do not know how yet) and it is written using DEFINE_CG_MOTION - as I have read it should be loaded as a compiled function.

I would be very gratefull if you could tell me what to do step by step so it will finally work. Thank you


#include "udf.h"

DEFINE_CG_MOTION(turbine_omega, dt, vel, omega, time, dtime)
{
real a, w, pi;

pi = 3.1415;
a = 0.007;
w = 2 * pi * 30;

vel[0] = 0;
vel[1] = a * w * sin(w*time);
vel[2] = 0;
}

[AlexanderZ]

from Ansys Fluent Customization manual

After the UDF that you have defined using DEFINE_CG_MOTION is compiled (Compiling UDFs),
the name of the argument that you supplied as the first DEFINE macro argument will become visible
in the Dynamic Mesh Zones dialog box in ANSYS Fluent. See Hooking DEFINE_CG_MOTION UDFs for details on how to hook your DEFINE_CG_MOTION UDF to ANSYS Fluent

best regards

[lukaszrze]

Thank you, it works!