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-   -   outlet boundary condition for open environment (http://www.cfd-online.com/Forums/openfoam-pre-processing/130650-outlet-boundary-condition-open-environment.html)

mprasad March 1, 2014 22:08

Dear all,

I am trying to simulate current flow in a tank with open environment at the outlet. I have tried several ways only to find that the current is reflected at the outlet causing water level to rise in the tank.

I am running a simple case where current is generated at the inlet using waves2foam.

I would like to simulate an open environment for my outlet boundary condition.

But I find that the current flow does not leave the tank but is reflected.

Is there something wrong with my outlet boundary conditions ?

These are my boundary conditions for the outlet

alpha1:

type zeroGradient

p_rgh :

type buoyantPressure
value uniform 0

U:

type inletOutlet;
inletValue uniform (0 0 0);
value $internalField;

*internal Field was set to uniform (0 0 0)


I would also like to ask does setting potential current (0 0 0) in the wave properties file for the outlet absorb current generated at the inlet?

Thank you.

Regards,
Prasad

mprasad March 2, 2014 03:49

2 Attachment(s)
Hi all,

With regards to my earlier query, attached are the sectional views for alpha1 and U.
The current flow for the inlet which is at the left is 2 ms-1.

Thank you.

Regards,
Prasad


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