Remez algorithm: Difference between revisions

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[[Image:Wetted Perimeter.svg|thumb|right|Cross sectional area of a trapezoidal open channel, red highlights wetted perimeter]]
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The '''wetted perimeter''' is the perimeter of the cross sectional area that is "wet."<ref name="Knighton">Knighton, David. Fluvial forms and processes: a new perspective. No. Ed. 2. Arnold, Hodder Headline, PLC, 1998.</ref> The term wetted perimeter is common in [[Civil Engineering|civil engineering]], [[Environmental Engineering|environmental engineering]], [[hydrology]], [[geomorphology]], and [[heat transfer]] applications; it is associated with the [[hydraulic diameter]] or [[hydraulic radius]]. Engineers commonly cite the cross sectional area of a river.
 
The wetted perimeter can be defined mathematically as
:<math>P = \sum_{i=0}^\infty{l_i}</math>
where <math>l_i</math> is the length of each surface in contact with the aqueous body.
 
In [[open channel flow]], the wetted perimeter is defined as the surface of the channel bottom and sides in direct contact with the aqueous body. [[Friction]] losses typically increase with an increasing wetted perimeter, resulting in a decrease in heat.<ref name="Knighton" /> In a practical experiment, one is able to measure the wetted perimeter with a tape measure weighted down to the river bed to get a more accurate [[measurement]].
 
When a channel is much wider than it is deep, the wetted perimeter approximates the channel width.<ref name="Knighton" />
 
==See also==
* [[Hydrological transport model]]
* [[Manning formula]]
* [[Hydraulic radius]]
 
==References==
{{reflist}}
 
{{DEFAULTSORT:Wetted Perimeter}}
[[Category:Earth sciences]]
[[Category:Environmental engineering]]
[[Category:Environmental science]]
[[Category:Fluid dynamics]]
[[Category:Geomorphology]]
[[Category:Hydraulic engineering]]
[[Category:Hydrology]]
 
{{Engineering-stub}}

Latest revision as of 13:05, 22 May 2014

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