What is the coefficient of discharge for a rectangular weir?
In the study for rectangular weir, for flat level, the coefficient of discharge is 0.571503 while for 1:2400 slope, the coefficient of discharge is 0.52528.
What is the weir coefficient?
The weir coefficient (as shown above in the weir equation) is a lumped parameter that includes the discharge coefficient, the gravitational constant, and constants based on geometric properties.
How is weir coefficient calculated?
The equation recommended by the Bureau of Reclamation in their Water Measurement Manual, for use with a suppressed rectangular weir is: Q = 3.33 B H3/2, where Q is the water flow rate in ft3/sec, B is the length of the weir (and the channel width) in ft, and H is the head over the weir in ft.
How do you find the coefficient of discharge in V-notch?
Exp-5 V-NOTCH
- AIM : To determine the coefficient of discharge of v – notch.
- APPARATUS : V-Notch equipment, Bucket, Inclined manometer, stop-watch.
- PROCEDURE :
- GRAPHS : Q = CD 8/15 tanΘ/2 √2g H5/2 Q = K H5/3 ; K = CD 8/15 tanΘ/2 √2g.
- RESULT : The value of discharge coefficient of v-notch obtained from,
- OBSERVATION TABLE :
How is weir discharge calculated?
Weirs to Measure Flow It works by raising the water level upstream of the weir, and then forcing the water to spill over. The more water is flowing over the weir, the deeper the water will be upstream of the weir. So measuring flow rate (CFS) can be done by simply measuring the depth of the water upstream.
What does discharge coefficient represent?
In a nozzle or other constriction, the discharge coefficient (also known as coefficient of discharge or efflux coefficient) is the ratio of the actual discharge to the ideal discharge, i.e., the ratio of the mass flow rate at the discharge end of the nozzle to that of an ideal nozzle which expands an identical working …
What is meant by coefficient of discharge?
Definition of coefficient of discharge : the ratio of the actual discharge to the ideal discharge, assuming unit coefficients of contraction and velocity, equal to the product of these coefficients.
What does coefficient of discharge depend on?
In a single phase flow, the discharge coefficient depends mainly on the Reynolds number and the beta factor. Dependence on Reynolds numbers is very weak (except low Reynolds numbers), so the performance of differential flow meters is rather insensitive to liquid viscosity.
How do you calculate flow through AV notch weir?
The Equation
- The equation to determine the flow rate of a 90° Triangular Notch Weir is:
- = Flow Rate in cfs.
- = Height of the upstream water above the bottom of the weir in feet.
What is sharp crested weir?
Sharp crested weirs (also called thin-plate weirs or notches) are used to obtain discharge in open channels by solely measuring the water head upstream of the weir. Weirs are extensively used in irrigation practices, laboratories and industry.