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#1 |
New Member
Rahul Suresh
Join Date: Sep 2010
Location: West Lafayette
Posts: 2
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I need help to write a UDF to vary the inlet mass flow rate (step input)..I need a step input..Is it possible? I just know the macros to be used is DEFINE_PROFILE for the boundary conditions. Please help me out with the UDF code.
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#2 |
New Member
Amir
Join Date: Oct 2010
Posts: 1
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Hi
You can see the examples of FLUENT 6.3 UDF manual about DEFINE_PROFILE. It's easy. for example, below is a code that define parabolic profile for inlet. #include "udf.h" DEFINE_PROFILE(Re270_art_profile,t,i) { real x[ND_ND]; /* this will hold the position vector */ real xcor,ycor; face_t f; begin_f_loop(f,t) { F_CENTROID(x,f,t); xcor=x[1]; ycor = x[2]; F_PROFILE(f,t,i) = 0.13883*(1 - ((xcor)*(xcor)+(ycor)*(ycor))/(0.004*0.004)); } end_f_loop(f,t) } Best |
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mass flow rate |
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