Syntax error when interpreting UDF file

hanis_iz · October 19, 2018, 03:10

Hello,
I'm using UDF in my simulation to achieve the actual velocity profile at the inlet (3D case). When I tried to interpret my UDF file in FLUENT, an error as below occurred.

Error: /home/m_shinohara/UDF2.c: line 4: syntax error.

I don't know how to fix the error since this is my very first time using UDF.
Here is my UDF file:

PHP Code:


			
#include "udf.h"

#define Q 3.3e-5  //unit m3/sec

#define Diameter 4.9e-3  //unit m

DEFINE_PROFILE(axialVelocity,t,i)

{

    real x[ND_ND];

    real r,Area;

    face_t f;

    Area=(M_PI/4.0)*pow(Diameter,2);

    begin_f_loop(f,t)

    {

        F_CENTROID(x,f,t);

        r=sqrt(pow(x[0],2)+pow(x[1],2));

        F_PROFILE(f,t,i)=(2.0*Q/Area)*(1-pow(2.0*r/Diameter,2));

    }

    end_f_loop(f,t)

}

I'm very glad if someone could help me to solve his problem.
Thank you in advance.

moh_zain · October 20, 2018, 12:55

sheck line 4

Area=(M_PI/4.0)*pow(Diameter,2);
M_PI and pow(diameter,2)

M_PI AND DIAMETER define them

hanis_iz · October 21, 2018, 00:30

Thank you for your suggestion, mohamed. I'll be sure to try it.

blackmask · October 21, 2018, 01:07

The "//" is C++ comment syntax. You should use c comment syntax "/* */".

hanis_iz · October 21, 2018, 01:12

Hi, blackmask. Thank you for the information.
I'll fix my UDF file

October 19, 2018, 03:10	Syntax error when interpreting UDF file	#1
hanis_iz New Member hanis izzati Join Date: Oct 2018 Posts: 6 Rep Power: 7	Hello, I'm using UDF in my simulation to achieve the actual velocity profile at the inlet (3D case). When I tried to interpret my UDF file in FLUENT, an error as below occurred. Error: /home/m_shinohara/UDF2.c: line 4: syntax error. I don't know how to fix the error since this is my very first time using UDF. Here is my UDF file: PHP Code: `#include "udf.h" #define Q 3.3e-5 //unit m3/sec #define Diameter 4.9e-3 //unit m DEFINE_PROFILE(axialVelocity,t,i) { real x[ND_ND]; real r,Area; face_t f; Area=(M_PI/4.0)pow(Diameter,2); begin_f_loop(f,t) { F_CENTROID(x,f,t); r=sqrt(pow(x[0],2)+pow(x[1],2)); F_PROFILE(f,t,i)=(2.0Q/Area)(1-pow(2.0r/Diameter,2)); } end_f_loop(f,t) }` I'm very glad if someone could help me to solve his problem. Thank you in advance.

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October 20, 2018, 12:55		#2
moh_zain Member mohamed Join Date: Apr 2016 Posts: 34 Rep Power: 10	sheck line 4 Area=(M_PI/4.0)*pow(Diameter,2); M_PI and pow(diameter,2) M_PI AND DIAMETER define them

October 21, 2018, 00:30		#3
hanis_iz New Member hanis izzati Join Date: Oct 2018 Posts: 6 Rep Power: 7	Thank you for your suggestion, mohamed. I'll be sure to try it.

October 21, 2018, 01:07		#4
blackmask Senior Member Join Date: Aug 2011 Posts: 421 Blog Entries: 1 Rep Power: 21	The "//" is C++ comment syntax. You should use c comment syntax "/* */".

October 21, 2018, 01:12		#5
hanis_iz New Member hanis izzati Join Date: Oct 2018 Posts: 6 Rep Power: 7	Hi, blackmask. Thank you for the information. I'll fix my UDF file