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현재 위치

Flow discharge through a horizontal pipe connected to a tank (reservoir)

작성자 Uploader : pleiades 작성일 Upload Date: 2018-09-03변경일 Update Date: 2018-09-04조회수 View : 314

As shown in figure, there is a circular pipe having its diameter D (m), length L (m) and friction coefficient f, connected to a tank of which water depth is H (m).
The flow velocity V in this pipe is calculated as below.

Assuming that the atmospheric pressures at water surface in tank and at
the pipe outlet,

H = V^2/(2g) + hf

Since hf = (fe + fo + f*L/D)*V^2/(2g),

H = V^2/(2g)*(1 + fe + fo + f*L/D)

V = (2*g*H / (1 + fe + fo + f*L/D))^(1/2)

where,
g : gravity acceleration
fe : entrance loss coefficient of pipe
fo : exit loss coefficient of pipe
f : friction loss coefficient of pipe
※ If the pipe is sufficiently long, fe and fo may be neglected. (i.e. fe=fo=0)

By Q=AV, the discharge Q (m^3/s) is :

Q = (2*g*H / (1 + fe + fo + f*L/D))^(1/2) * (πD^2)/4

*** 참고문헌[References] ***

Q = (2*g*H / (1 + fe + fo + f*L/D))^(1/2) * (π*D^2)/4


변수명 Variable	변수값 Value	변 수 설 명 Description of the variable

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1st Step for All

현재 위치

Flow discharge through a horizontal pipe connected to a tank (reservoir)

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