Wetted Perimeter Calculator

The perimeter of the wet cross sectional area is known as the wetted perimeter. It depends on the hydraulic diameter or hydraulic radius. The term is commonly used in fields like civil engineering, environmental engineering, hydrology, geomorphology, and in heat transfer applications. The hydraulic radius for a circular pipe flowing full is easy to calculate. Here is an online mechanical calculator to calculate the wetted perimeter of a circular hydraulic pipe channel.


Wetted Perimeter of a Circular Pipe Channel

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The perimeter of the wet cross sectional area is known as the wetted perimeter. It depends on the hydraulic diameter or hydraulic radius. The term is commonly used in fields like civil engineering, environmental engineering, hydrology, geomorphology, and in heat transfer applications. The hydraulic radius for a circular pipe flowing full is easy to calculate. Here is an online mechanical calculator to calculate the wetted perimeter of a circular hydraulic pipe channel.

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Wetted Perimeter of Circle

Formula:

p = cos-1 ( 1 - ( h / r ) ) * D Where, p = Wetted Perimeter of a Circular Pipe Channel h = Height r = Radius D = Diameter

Example

A circular pipe with height 5 m and diameter 7 m has a central angle of
θ = cos-1 ( 1 - ( 5 / 3.5 ) )
= cos-1 ( -1.5 / 3.5 )
= 2.01371 Radians
Wetted Perimeter = 2.01371 x 7
= 14.096


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