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What is hydraulic diameter and reference value?

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Old   September 29, 2007, 11:53
Default What is hydraulic diameter and reference value?
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vincent
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Hello, can anybody tell me what is hydraulic diameter? if i am simulating a 2 dimensional air flow simualtion around a 4.465m length and 1.42m heigh car in a 60 x 35 meter square wind tunnel, what hydraulic diameter should i set? what are the area and length values should i set in the reference value? thanks.
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Old   October 1, 2007, 09:59
Default HELP please! urgent.
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vincent
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Hello, can anybody tell me what is hydraulic diameter? if i am simulating a 2 dimensional air flow simualtion around a 4.465m length and 1.42m heigh car in a 60 x 35 meter square wind tunnel, what hydraulic diameter should i set? what are the area and length values should i set in the reference value? thanks.

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