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Old   August 28, 2008, 22:37
Default ROTATING RESERVOIR
  #1
S. KRISHNAN
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I seek your help in solving a flow problem. the description of the problem is:

A hollow cylindrical vessel, rotating at 5000 rpm having a small orifice on the outer wall. It is filled with a liquid. I want to simulate the flow and find out how much time it would take to empty the cylinder.

Please give your expert advice

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Old   August 29, 2008, 12:05
Default Re: ROTATING RESERVOIR
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F S
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Hi

Make a cylindrical domain with fluid as Air. Place your vessel in this domain (select the fluid as water). Assign your vessel as rotating wall.

Good luck
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Old   August 30, 2008, 07:46
Default Re: ROTATING RESERVOIR
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F S
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PS: You ll need to do a transient simulation.
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Old   September 4, 2008, 02:42
Default Re: ROTATING RESERVOIR
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S. KRISHNAN
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My specific question:

In this problem, the inner boundary is moving towards the outer boundary with respect to time. Should we assign mesh motion? If so how it can be given? Should it be given as a CEL? Also the dimensions of the fluid domain are: Outer diameter: 36mm Inner diameter: 20mm Length: 15mm Orifice diameter : 0.5mm Number of orifices : 1

Can we model it as a quarter of the cylinder and apply symmetric boundary? Also tell me about the meshing process.

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