Parse error in UDF

pratikddhoot · March 30, 2016, 16:24

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` · March 30, 2016, 18:07

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:

Code:

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 · March 31, 2016, 16:06

Hi,

Thanks. That was very much useful.

March 30, 2016, 16:24	Parse error in UDF	#1
pratikddhoot New Member Pratik Dhoot Join Date: Mar 2016 Location: Boston, MA Posts: 20 Rep Power: 10	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.

March 30, 2016, 18:07		#2
`e` Senior Member Join Date: Mar 2015 Posts: 892 Rep Power: 18	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: Code: 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.

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March 31, 2016, 16:06		#3
pratikddhoot New Member Pratik Dhoot Join Date: Mar 2016 Location: Boston, MA Posts: 20 Rep Power: 10	Hi, Thanks. That was very much useful.