[GAMBIT] hydraulic diameter? -- CFD Online Discussion Forums

December 20, 2009, 16:03

hydraulic diameter?

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smith

Join Date: Apr 2009

Posts: 75

Rep Power: 17

hey, maybe I'm just confused because of the English word for it (sorry, my first language isn't English) but i need help with the "hydraulic diameter" setting in gambit.

The problem is in the attachment. I have to create a wind tunnel with a lorry inside (3D).

in the bundary conditions in fluent i can set up for both inlet and outlet the option specification method: itensity and hydraulic diameter

what is my hydraulic diameter in this case? the hydraulic diameter of the lorry? or the wind tunnel?

Is it the same like the characteristic length of the reynolds number when i want to calculate my reynolds number for this case?

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