Suction Boundary Condition
Hi,
I am trying to solve a problem in which the channel is rectangular and the bottom wall will have a suction, meaning the fluid near the bottom wall will go downward with a certain velocity. How would I specify such boundary condition in FLUENT? Thanks, Akim |
Pressure outlet?
I'm not sure if you can set a mass flow inlet or a velocity inlet and then if you can specify a negative value... I'm not sure I understand your proble..post a picture. Daniele |
Porous wall
Actually,
My adviser told me to model a wall as a "porous wall" which will allow fluid to seep through. Is there a way to specify that in FLUENT? Thanks, Akim |
put ur suction boundary as pressure outlet
write a udf using DEFINE_PROFILE and place it on this boundary..should work I am doing the same thing except my boundary is oscillating suction and injection. |
Would you kindly elaborate on writing the UDF on the "DEFINE_PROFILE". I'm not too sure on UDFs.
Thanks, Akim |
/************************************************** ********************/
/* unsteady.c */ /* UDF for specifying a transient velocity profile boundary condition */ /************************************************** ********************/ #include "udf.h" DEFINE_PROFILE(SJ_velocity, thread, position) { face_t f; begin_f_loop(f, thread) { real freq=25.; real vol=400.; real spd=vol/520.; real t = RP_Get_Real("flow-time"); F_PROFILE(f, thread, position) = spd*sin(freq*(t-0.075)*(2.*3.141592654)); } end_f_loop(f, thread) } |
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