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-   -   Hydraulic Diameter - Series of Holes (http://www.cfd-online.com/Forums/fluent/45743-hydraulic-diameter-series-holes.html)

Jop August 16, 2007 04:58

Hydraulic Diameter - Series of Holes
 
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.

Joe August 16, 2007 07:01

Re: Hydraulic Diameter - Series of Holes
 
total inlet area / total wetted perimeter

Jop August 16, 2007 07:29

Re: Hydraulic Diameter - Series of Holes
 
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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