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Hydraulic Diameter - Series of Holes

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Old   August 16, 2007, 04:58
Default Hydraulic Diameter - Series of Holes
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Jop
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Hello there,

I am simulating a case where I defined a series of holes which lie around a tube as one inlet area. Now I am wondering which hydraulic diameter I have to enter as a boundary condition. Do I have to enter the hydraulic diameter of one hole or the hydraulic diameter of all holes combined? Or maybe this is just the same, right?

Hmm, maybe this is the same, but would be nice, if someone could verify for me.

Greetigns, Jop.
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Old   August 16, 2007, 07:01
Default Re: Hydraulic Diameter - Series of Holes
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Joe
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total inlet area / total wetted perimeter
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Old   August 16, 2007, 07:29
Default Re: Hydraulic Diameter - Series of Holes
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Jop
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Thx Joe. Another problem is, that I am simulating a rototional periodic system. So I have to use the total inlet area / total wetted perimeter which are actually in the computational area?

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