[ussama.ali]

Hello everyone,
I am working on analyzing the flow around a cylinder in Fluent. The cylinder wall is to be rotated via UDF in a clockwise and anti-clockwise direction (like an oscillatory motion). I get an error if I try to compile or interpret the UDF. Please help me in resolving the following error:

When I try to interpret:
Error: C:/Users/Ali/AppData/Local/Temp/2.c.6616.0.c: line 17: structure reference not implemented
When I try to compile:
..\..\src\2.c(17) : error C2440: '=' : cannot convert from 'double' to 'Profile'

Following is the UDF code:
#include "udf.h"
#include "threads.h"
#define o 0.5
#define st 0.2
#define pi 3.1416
DEFINE_ADJUST(rotational_profile, d)
{
Thread *thread = Lookup_Thread(d, 8);
real current_time = RP_Get_Real("flow-time");
THREAD_VAR(thread).wall.omega = o*sin(2*pi*st*current_time);
}

I am using windows 8.1 64bit with MS Visual Studio installed. Ansys version is 2019 R3.

[vinerm]

You don't need a UDF for this; use transient profile.

If, for some reason, you want to use UDF, then you need to use DEFINE_TRANSIENT_PROFILE.

[ussama.ali]

Dear Vinerm,
Thank you for your reply, can you please elaborate on how to use transient profile?

[vinerm]

Search Fluent forum for transient profile, you'll find what you are looking for.