Formula for flow out of a container through an apurtance.
Formula for flow out of a container through an apurtance.
(OP)
I refer to a post in 2004 by PEDARRIN2 as follows
"There is a formula for flow out of a container through an apurtance.
It is
Q=C(d)*A*(2gH)^.5
Q is flow rate in cubic meters per second
C(d) is .6014
A is area in meters
g is 9.81"
Can anyone please explain "C(d) is .6014"
"There is a formula for flow out of a container through an apurtance.
It is
Q=C(d)*A*(2gH)^.5
Q is flow rate in cubic meters per second
C(d) is .6014
A is area in meters
g is 9.81"
Can anyone please explain "C(d) is .6014"





RE: Formula for flow out of a container through an apurtance.
you must get smarter than the software you're using.
RE: Formula for flow out of a container through an apurtance.
RE: Formula for flow out of a container through an apurtance.
RE: Formula for flow out of a container through an apurtance.
The flow will vary depending on the height of the fluid in the container, decreasing as the fluid level drops.
RE: Formula for flow out of a container through an apurtance.
depending on the approach conditions, exit conditions, submergence, head, gate, tube or flat plate, round, square, slotted, and other geometric conditions - orifice coefficients can range from 0.49 up to nearly 1. so, yes - .6014 might still be correct.
RE: Formula for flow out of a container through an apurtance.
In a nozzle or other constriction, the discharge coefficient (also known as coefficient of discharge) is the ratio of the actual discharge to the theoretical discharge,[1] 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 fluid from the same initial conditions to the same exit pressures.
http://en.wikipedia.org/wiki/Discharge_coefficient
RE: Formula for flow out of a container through an apurtance.
That's not correct. The discharge coefficient depends heavily on the vena contracta.
Good luck,
Latexman
Technically, the glass is always full - 1/2 air and 1/2 water.
RE: Formula for flow out of a container through an apurtance.
RE: Formula for flow out of a container through an apurtance.
you must get smarter than the software you're using.
RE: Formula for flow out of a container through an apurtance.
The ratio of loss of head in the orifice to the head of water available at the exit of the orifice is known as coefficient of resistance (not discharge coefficient as someone posted). The loss of head in the orifice takes place, because the walls of the orifice offer some resistance to the liquid as it comes out. The coefficient of resistance is generally neglected, while solving numerical problems.
The ratio of actual velocity of the jet, at vena contracta, to the theoretical velocity is known as coefficient of velocity. The value of Coefficient of velocity varies slightly with the different shapes of the edges of the orifice. This value is very small for sharp-edged orifices. For a sharp edged orifice, the value of Cv increases with the head of water.
The ratio of the area of the jet, at vena contracta, to the area of the orifice is known as coefficient of contraction. The value of Coefficient of contraction varies slightly with the available head of the liquid, size and shape of the orifice. The average value of Cc is 0.64.
The ratio of a actual discharge through an orifice to the theoretical discharge is known as coefficient of discharge. Mathematically coefficient of discharge = Co = Cv * Cc
The value of coefficient of discharge varies with the values of Cv and Cc. An average of coefficient of discharge varies from 0.60 to 0.64.
The final form of the orifice equation becomes: Q = CcVA = CoA * (sq rt(2gH))
where: A = orifice area, Cc = contraction coefficient, Co = discharge coefficient = Cc * Cv, g = acceleration due to gravity = 32.2 ft/s2 or 9.80 m/s2, H = head , Q = flowrate (discharge), V = horizontal velocity through orifice.
http://www.lmnoeng.com/Tank/TankTime.htm
Vena contracta is the point in a fluid stream where the diameter of the stream is the least, and fluid velocity is at its maximum, such as in the case of a stream issuing out of a nozzle, (orifice). It is a place where the cross section area is minimum. The maximum contraction takes place at a section slightly downstream of the orifice, where the jet is more or less horizontal.
The size of the vena contracta is the result of the available head of the liquid, size and shape of the orifice.
RE: Formula for flow out of a container through an apurtance.
RE: Formula for flow out of a container through an apurtance.
you must get smarter than the software you're using.