Free surface is not falling (VOF MODEL, TANK DRAINAGE)
I am modeling a tank drainage on VOF model of Fluent. Tank has a simple rectangular shape having one inlet at the top and three outlets at bottom. Tank's lower volume is filled with water (using adapt region) and upper volume by air.
Inlet: Velocity inlet
Outlets: Pressure outlet
Incoming Fluid through inlet is water.
Explicit scheme, CFL=2.0, Geo-reconstruct, Variable Time iteration
Inlet area is large than the sum of three outlets.
(a) When I put X m/s velocity at inlet BC, all three outlets shows about same outlet velocity. Is it correct?
(b) There is no change in free surface level of water in the tank. I have checked REPORT FLUXES of inlet and all outlets, inlet flux=outlets fluxes.
why free surface is not falling or rising? I have changed inlet velocity but there is no change in free surface and incoming & out going fluxes remains constant. In practical phenomenon free surface should fall.
Please help me.
Please any one reply
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I am trying to simulate water draining from at a tank at 10 meter elevation through a pipe. I am using ANSYS FLUENT to do that. I am using VOF for modelling.
I am having difficulties in defining the inlet and outlet boundary condition.
Right now, I am using pressure-inlet and pressure-outlet for inlet and outlet boundary conditions, but after running the code, it shows a lot of secondary flow within the tank and pipe.
anyone have an idea about that?
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