UDF for lift force on a bluff body

April 10, 2005, 01:36

Hi, This is sawa. I'm working with a bluff body problem. I need to get the lift force acting on body inorder to calculate the response using udf. Could find the way to get a total force acting over the body using "valve.c" of udf tutorial. Is there any way to get only the lift force over the body. Thanks in advance. sawa

April 10, 2005, 04:05

Hi, If you wish to calculate the component of total force working on one axis (for example Z) it can be made so: begin_f_loop (f, t)

{

F_AREA (A, f, t);

force += F_P (f, t) * A[2];

} end_f_loop (f, t)

Anatoly

April 11, 2005, 03:06

Yes, thatìs right. But that works only for the segregated solver...Any idea for the ciupled solver?

April 10, 2005, 01:36	UDF for lift force on a bluff body	#1
sawa Guest Posts: n/a	Hi, This is sawa. I'm working with a bluff body problem. I need to get the lift force acting on body inorder to calculate the response using udf. Could find the way to get a total force acting over the body using "valve.c" of udf tutorial. Is there any way to get only the lift force over the body. Thanks in advance. sawa

April 10, 2005, 04:05	Re: UDF for lift force on a bluff body	#2
Anatoly Guest Posts: n/a	Hi, If you wish to calculate the component of total force working on one axis (for example Z) it can be made so: begin_f_loop (f, t) { F_AREA (A, f, t); force += F_P (f, t) * A[2]; } end_f_loop (f, t) Anatoly

April 11, 2005, 03:06	Re: UDF for lift force on a bluff body	#3
Luca Guest Posts: n/a	Yes, thatìs right. But that works only for the segregated solver...Any idea for the ciupled solver?

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