This construction
video provides some useful tricks on how to design or find out the most
economical segment toward rectangular open channel.

Open Channel Flow is described as fluid flow
containing a free surface open to the atmosphere. The instances are streams,
rivers and culverts not flowing full.

The video provides
solution to the following problem :-

problem:--Find the most economical X-section of a
rectangular channel to carry 0.3𝑚^3/sec of water when
channel bed slope is 1:1000. assume chezy’s constant, C=60

In the solution
provided, chezy’s formula as well as some condition of economical section is
applied to obtain the size of the channel.

The Chezy formula is applicable to pipes having
turbulent flow. In fluid dynamics, the Chézy formula defines the mean flow
velocity of steady, turbulent open channel flow.

The
formula is given as

• {\displaystyle v=C{\sqrt
{R\,i}},\,}where

• {\displaystyle v}ν denotes average velocity [m/s],

• {\displaystyle C}C denotes Chezy's coefficient [m½/s],

• {\displaystyle R}R is the hydraulic radius (~ water depth) [m], and

• {\displaystyle i}i is the bottom slope [m/m].

• {\displaystyle v}ν denotes average velocity [m/s],

• {\displaystyle C}C denotes Chezy's coefficient [m½/s],

• {\displaystyle R}R is the hydraulic radius (~ water depth) [m], and

• {\displaystyle i}i is the bottom slope [m/m].

**Read more**

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Published By

Rajib Dey

www.constructioncost.co

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