boundary condition inlet equal outlet

jpinho · June 29, 2009, 09:23

hello everyone,

i would like to know it it is possible to define a boundary condition as pressure outlet which will be the velocity inlet condition.

Basically both boundaries are exactly the same. this would be interesting to simulate closed circuits.

any suggestion?

thanks
jpinho

nstar · June 29, 2009, 10:57

I was thinking exactly the same thing but never got chance to try it. I doubt it's gonna work. Please tell me more when you find something interesting.

Rami · July 1, 2009, 09:58

If correctly understood, you are describing a periodic BC.

jpinho · July 1, 2009, 10:34

rami,

thanks for your reply.. not exactly.. i was thinking to simulate a complete closed cycle.. like a thermodynamic one rankine or joule-brighton..

my question is.. if i have a closed geometry how can i set up boundary conditions for the flow?

kind regards
jpinho

nstar · July 1, 2009, 10:50

I guess you will have to cut a thin slice out of the domain.

Quote:

Originally Posted by jpinho

rami,

thanks for your reply.. not exactly.. i was thinking to simulate a complete closed cycle.. like a thermodynamic one rankine or joule-brighton..

my question is.. if i have a closed geometry how can i set up boundary conditions for the flow?

kind regards
jpinho

jpinho · July 1, 2009, 11:19

ok.. i agree..

and what about the boundary conditions??
how can you set that the inlet and outlet are the same boundaries??

(this was my initial question...)

jpinho

nstar · July 2, 2009, 11:09

UDF? idk either

June 29, 2009, 09:23	boundary condition inlet equal outlet	#1
jpinho New Member pinho Join Date: May 2009 Posts: 22 Rep Power: 17	hello everyone, i would like to know it it is possible to define a boundary condition as pressure outlet which will be the velocity inlet condition. Basically both boundaries are exactly the same. this would be interesting to simulate closed circuits. any suggestion? thanks jpinho

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June 29, 2009, 10:57		#2
nstar New Member Ling Join Date: Jun 2009 Posts: 25 Rep Power: 17	I was thinking exactly the same thing but never got chance to try it. I doubt it's gonna work. Please tell me more when you find something interesting.

July 1, 2009, 09:58		#3
Rami Senior Member Rami Ben-Zvi Join Date: Mar 2009 Posts: 155 Rep Power: 17	If correctly understood, you are describing a periodic BC.

July 1, 2009, 10:34		#4
jpinho New Member pinho Join Date: May 2009 Posts: 22 Rep Power: 17	rami, thanks for your reply.. not exactly.. i was thinking to simulate a complete closed cycle.. like a thermodynamic one rankine or joule-brighton.. my question is.. if i have a closed geometry how can i set up boundary conditions for the flow? kind regards jpinho

July 1, 2009, 11:19		#6
jpinho New Member pinho Join Date: May 2009 Posts: 22 Rep Power: 17	ok.. i agree.. and what about the boundary conditions?? how can you set that the inlet and outlet are the same boundaries?? (this was my initial question...) jpinho

July 2, 2009, 11:09		#7
nstar New Member Ling Join Date: Jun 2009 Posts: 25 Rep Power: 17	UDF? idk either