UDF in 3D domain

aviitkgp1 · March 13, 2010, 12:53

hello everyone!

Can anyone please give me some tutorials (or their link) related to 3D UDFs. All the examples given in fluent tutorials are in 2D.

Thanks in advance!

Regards

Ankit Verma
aviitkgp1@gmail.com

sega · March 14, 2010, 09:08

Whats the problem with 3D?!

aviitkgp1 · March 14, 2010, 10:30

I have read many examples of 2D UDFs, but there's no example of 3D UDF given in fluent tutorial.

I wrote a 2D UDF to vary contact angle along x axis at the bottom surface. I am not sure whehter it would work for 3D as well.

The UDF is :

#include "udf.h"

DEFINE_PROFILE(contact_angle,t,i)
{
real y[ND_ND];
real x;
face_t f;

begin_f_loop(f,t)
{
F_Centroid(y,f,t);
x=y[1];
F_PROFILE(f,t,i)=90-(1700*x);
}
end_f_loop(f,t)

}

x varies from 0 to 0.05
y varies from 0 to 0.01
z varies from 0 to 0.02

The contact angle is defined at y=0 and does not change with z direction.

--Ankit Verma

March 13, 2010, 12:53	UDF in 3D domain	#1
aviitkgp1 New Member Ankit verma Join Date: Oct 2009 Location: CHandigarh, Kharagpur Posts: 4 Rep Power: 16	hello everyone! Can anyone please give me some tutorials (or their link) related to 3D UDFs. All the examples given in fluent tutorials are in 2D. Thanks in advance! Regards Ankit Verma aviitkgp1@gmail.com

March 14, 2010, 09:08		#2
sega Senior Member Sebastian Gatzka Join Date: Mar 2009 Location: Frankfurt, Germany Posts: 729 Rep Power: 20	Whats the problem with 3D?! __________________ Schrödingers wife: "What did you do to the cat? It's half dead!"

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March 14, 2010, 10:30		#3
aviitkgp1 New Member Ankit verma Join Date: Oct 2009 Location: CHandigarh, Kharagpur Posts: 4 Rep Power: 16	I have read many examples of 2D UDFs, but there's no example of 3D UDF given in fluent tutorial. I wrote a 2D UDF to vary contact angle along x axis at the bottom surface. I am not sure whehter it would work for 3D as well. The UDF is : #include "udf.h" DEFINE_PROFILE(contact_angle,t,i) { real y[ND_ND]; real x; face_t f; begin_f_loop(f,t) { F_Centroid(y,f,t); x=y[1]; F_PROFILE(f,t,i)=90-(1700*x); } end_f_loop(f,t) } x varies from 0 to 0.05 y varies from 0 to 0.01 z varies from 0 to 0.02 The contact angle is defined at y=0 and does not change with z direction. --Ankit Verma