Calculating water discharge in a pipe/ How to calculate flow rate of water in a pipe.

 Let us calculate the water flow rate or discharge in a pipe as shown below.

Given data:

The velocity of water in the pipe = 4m/sec ( V ).

Inner dia. of pipe = 100mm = 0.1m. (d ).

Calculation:

The flow rate or discharge of water (Q )

= [sectional area of pipe (A ) × velocity (V )]

The sectional area of pipe A = πr2

Here,

r = inner radius of the pipe

 radius =[ pipe diameter ÷ 2 ]

i.e.  r = [d ÷ 2]

         =[0.1m ÷ 2]

        = 0.05m.

A = π × (0.05 )2

  = 3.142 × (0.05 )2

   =0.007855 sqm.

  The flow rate or discharge of water

Q = [V × A]

      = [4m/sec × 0.007855 sqm.]

     = 0.03142 cum/sec.

(As you know, 1cum = 1000 liter.)

    = 31.42 liter /sec.

To go through the articles on Estimation & calculation in civil engineering, click here.

Thank you for going through these calculation steps❤. Have a good day 😄.

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