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UDF 2D inlet profile

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Old   January 16, 2013, 07:40
Default UDF 2D inlet profile
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Thomas Hoffmann
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Hi all.

I'm up to write a UDF inlet profile. The inlet profile should be given by:
v=0.001474*(1-(r/R)^3).

By studying other examples I've come to the code shown here below. But I get an error in line 11 'no function prototype', when I try to interpret it. Can anybody help?
Thanks

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#include "udf.h"
DEFINE_PROFILE(inlet_velocity_x, t, i)
{
real x[ND_ND]; /* this will hold the position vector*/
real y;
face_t f;
begin_f_loop(f,t)
{
F_CENTROID(x,f,t);
y=x[1]
F_PROFILE(f,t,i) = 0.001474*(1-((0.024-y)/0.024)^3)
}
end_f_loop(f,t)
}
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Old   January 16, 2013, 09:40
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Thomas Hoffmann
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Ok, I figured it out... I forgot the semicolons in line 10 and 11, and for some reason it is not allowed to use '^3', so I just wrote: ((0.024-y)/0.024)*((0.024-y)/0.024)*((0.024-y)/0.024)...
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Old   January 17, 2013, 03:47
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Max
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a more elegant way for x^y: pow(x,y)

cheers
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Old   January 17, 2013, 04:38
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Thomas Hoffmann
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I have never worked with C code before, but thanks for the input
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