Name of the faculty: K.Naveen KumarDesignation: LecturerBranch: Civil EngineeringInstitute: J.N.Govt.Potytech,HydYear / Semester: v SemMajor Topic: Flow through pipesSub Topic: Chezys formula for loss of head in pipesSub. Code &Title: C-505 : Hydraulics IIDuration: 50 min. Teaching Aids: PPT, Animations BORAD OF TECHNICAL EDUCATION ANDHRAPRADESH

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OBJECTIVES:

On the completion of this period you would be able toDerive the Chezys formula for Loss of head Due to friction in pipes

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Recap:In the previous class, you have learnt about:

Derivation of Darcys Equation for loss of head in pipes.

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Chezys formula for FRICTION LOSS IN PIPE FLOW

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Chezys equation for losses of head due tofriction in pipes:

In the previous derivation of darcys equation for losses of head due to friction in pipes, We have seen eq 3.

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Where

hf= Loss of head due to friction

A= Cross section of pipe

P= Wetted perimeter of pipe

L= Length of pipe

V= mean velocity of flow

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Now (A/P) is called as hydraulic mean depth and is denoted by m

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Substituting in eq 3,

we get

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Let

And

Where C = Chezys constant i = loss of head per unit length of pipe

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Substituting C & i in earlier equation, we get

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SummaryWe have discussed about

The derivation of chezys equation for loss of head due to friction in pipes

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QUIZ1.The major loss of head in a pipe line occurs due to

(a)Density

(b)Viscosity

(c)Pressure

(d)friction

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The loss of head due to friction is a function of

(a)V

(b)V2

(c)1/V

(d)1/V2

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Frequently Asked QuestionsDerive Chezys equation for loss of head due to friction in Pipes ?

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