1.
KALI CHARAN NIGAM INSTITUTE OF
TECHNOLOGY, BANDA
LECTURE
ON
TRIANGULAR NOTCH
FLUID MECHANICS AND FLUID MACHINE(KME302)
( III SEMESTER )
BY : DEEPAK KUMAR YADAV
ME DEPARTMENT

2.
DISCHARGE OVER A TRIANGULAR
NOTCH OR WEIR
• The expression for the discharge over a triangular
notch or weir is the same. It is derived as
• Width of strip
• Area of strip
• Discharge through the strip,

3.
DISCHARGE OVER A TRIANGULAR
NOTCH OR WEIR
• Total discharge,
• For a right angled V notch , If Cd=0.6
θ = 90o
Discharge

4.
NUMERICAL
PROBLEM 1:During an experiment in a laboratory 0.05m3
of water flowing over a right-angled notch was
collected in 1minute. If the head of the sill is 50mm,
calculate the co-efficient of discharge. [ AKTU 2021-22]
PROBLEM 2:Find the discharge over a triangular notch of
angle 60o when the head over the V notch is 0.3m.
Assume Cd =0.6.
PROBLEM 3: Water flows over a rectangular weir 1m at a
depth of 150mm and afterwards passes through a
triangular right-handed weir. Take Cd for the rectangular
and triangular weir as 0.62 and 0.59 respectively, find
the depth over the triangular weir.

5.
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