Periodic flow

February 26, 2008, 03:15

Hi, I have an unsteady flow. At the inlet , velcoity U=0.2+0.3*sin(100*t) At outlet : opening type

At some times my inlet would be outlet. How should I choose Boundary condition in this case?

Thanks, ---Selim

February 26, 2008, 05:00

Hi,

If you mean that sometimes the flow goes into the domain and sometimes it goes out - that is fine, an inlet with a prescribed velocity should work here.

Glenn Horrocks

February 26, 2008, 07:48

you can execute it by using inlet boundary, because the 'inlet boundary' does not only means that the fluid flow into the calculating region.

February 26, 2008, 03:15	Periodic flow	#1
selim Guest Posts: n/a	Hi, I have an unsteady flow. At the inlet , velcoity U=0.2+0.3sin(100t) At outlet : opening type At some times my inlet would be outlet. How should I choose Boundary condition in this case? Thanks, ---Selim

February 26, 2008, 05:00	Re: Periodic flow	#2
Glenn Horrocks Guest Posts: n/a	Hi, If you mean that sometimes the flow goes into the domain and sometimes it goes out - that is fine, an inlet with a prescribed velocity should work here. Glenn Horrocks

February 26, 2008, 07:48	Re: Periodic flow	#3
kirby Guest Posts: n/a	you can execute it by using inlet boundary, because the 'inlet boundary' does not only means that the fluid flow into the calculating region.

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