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UDF error: Double udf function expected

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Old   February 14, 2021, 13:42
Default UDF error: Double udf function expected
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Andrew Bickerdike
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Hi,
I'm doing a project where I am simulating blood flow in the aorta and I've got a UDF for the pulsatile flow:

/* PULSATILE FLOW DEFINITION UDF */
#include "udf.h"
#define PI 3.141592654

DEFINE_PROFILE(inlet_x_velocity,th, i)
{
face_t f;
real t = CURRENT_TIME;
begin_f_loop(f,th)
{
F_PROFILE(f,th,i) = (4700.000000/(0.064731*60.0*437.435361))*pow(sin(3.141593*t),13 .0)*(cos((3.141593*t)-(PI/10.0)));
}
end_f_loop(f,th)
}


the problem being that I always get the error:
"chip-exec: inlet_x_velocity: wrong return type: double udf function expected"

Any suggestions about this?

Thanks.
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Old   February 15, 2021, 00:31
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Quote:
Originally Posted by andrewbickerdike View Post
Hi,
I'm doing a project where I am simulating blood flow in the aorta and I've got a UDF for the pulsatile flow:

/* PULSATILE FLOW DEFINITION UDF */
#include "udf.h"
#define PI 3.141592654

DEFINE_PROFILE(inlet_x_velocity,th, i)
{
face_t f;
real t = CURRENT_TIME;
begin_f_loop(f,th)
{
F_PROFILE(f,th,i) = (4700.000000/(0.064731*60.0*437.435361))*pow(sin(3.141593*t),13 .0)*(cos((3.141593*t)-(PI/10.0)));
}
end_f_loop(f,th)
}


the problem being that I always get the error:
"chip-exec: inlet_x_velocity: wrong return type: double udf function expected"

Any suggestions about this?

Thanks.
This is not a problematic error. It's the compiler being pedantic. It will never give you any problem in your simulation.
But it looks distracting. One way to remove it:

F_PROFILE(f,th,i) = (real) (4700.000000/(0.064731*60.0*437.435361))*pow(sin(3.141593*t),13 .0)*(cos((3.141593*t)-(PI/10.0)));
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