Orifice vs Weir
Orifice vs Weir
(OP)
I'm trying to find out when to use weir equation or orifice equation for an orifice in an horizontal pipe.
Is this relation true?
Orifice equation when submerged i.e H >0.5*D
H = Head above center line of orifice
D = Diameter
And is there "any rule" such as this one for a Riser pipe (vertical drain).
Thanks in advance!
Is this relation true?
Orifice equation when submerged i.e H >0.5*D
H = Head above center line of orifice
D = Diameter
And is there "any rule" such as this one for a Riser pipe (vertical drain).
Thanks in advance!





RE: Orifice vs Weir
http://www
Hope this helps.
Ryb01
RE: Orifice vs Weir
RE: Orifice vs Weir
Helpful!
This link too :
http://b
RE: Orifice vs Weir
1/2
Q = C a (2gh)
Where:
C=Discharge coefficient
a=Submerged area
g=Gravitational constant
h=Effective head
Vertical Orifice
For an orifice opening in a vertical plane, the effective head is given by:
h=H-max(r,TW) (if fully submerged: H>2r)
h=H-max(H/2,TW) (if partially submerged: H<2r)
Where:
H=Head above invert
TW=Tailwater depth above invert
r=Radius