Author Topic: VOF to model draining tank, swirling fluid, vortex?  (Read 1311 times)

Offline infocfd

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VOF to model draining tank, swirling fluid, vortex?
« on: May 13, 2012, 11:16:43 AM »
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Hi,

It is possible to model a draining tank filled with a swirling liquid, and to capture the vortex that forms at the drain. The goal is to pinpoint the time at which the first gas reaches the drain.

Please help.

Thanks.

Offline william

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Re: VOF to model draining tank, swirling fluid, vortex?
« Reply #1 on: May 13, 2012, 11:18:41 AM »
Use pressure inlet to maintain the tank pressure (otherwise the assumption of incompressibility in FLUENT is violated, and one gets pockets of gas in the liquid). Use a custom Field Function to set
up an initial swirl velocity.
Use velocity inlet as the boundary condition, with the direction vector pointing out of the tank, and with the volume fraction of liquid equal to unity.