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The formula for hydraulic diameter is______

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+1 vote
in Fluid Mechanics by (118k points)
The formula for hydraulic diameter is______

(a) 4A/P

(b) 4AP

(c) 4AV

(d) 4V

I have been asked this question in homework.

The question is from Loss of Head due to Friction in Viscous Flow topic in division Viscous Flow & Turbulent Flow of Fluid Mechanics

1 Answer

+2 votes
by (362k points)
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Best answer
Right option is (a) 4A/P

The explanation is: Hydraulic diameter handles the flow in non-circular channels and tubes. The most suitable term to calculate the hydraulic diameter for a round tube is Dh= 4A/P. Where ‘A’ is the cross-sectional area and ‘P’ is the wetted perimeter.

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