[pratikddhoot]

Hello everybody,

I am trying to use UDF for defining turbulence viscosity at a cell as a function of its distance from the wall.

I used syntax

real x[ND_ND];
C_CENTROID(x,c,t)
float d1 = x[0];

to find the x coordinate of every cell in the loop but I get a parse error in the float term. I tried to fix it but I am still struggling.

If anyone can help with this, please comment.

Thanks,
Pratik.

[`e`]

Fluent UDFs follow the ANSI C standard and variables must be declared at the start of a code block. You've called the C_CENTROID macro and then declared the variable d1. Move this declaration further up, for example:

real x[ND_ND];
float d1 = x[0];
C_CENTROID(x,c,t);

You also need to end the C_CENTROID line with a semicolon.

[pratikddhoot]

Hi,

Thanks. That was very much useful.