Assumptions
No losses for air resistance exiting the spout are taken into account
Working fluid is incompressible i.e. water
Atmospheric pressure is taken as 101.325KN/m2
Discharge coefficient varies depending on nozzle type (typically 0.9 - 0.98)
Depth is the difference in depth between the tank water level and the level of the nozzle
Data Entery
Depth (Δz)
Fluid density (ρ)
Nozzle diameter (D)
Discharge Coefficient (C)
Solution
Exit velocity (v)
Flowrate (Q)
Formula
Vjet = (2gΔz)^0.5
Q = C.A noz.Vjet
10
1000
0.1
0.98
14.007
107.757
m
kg/m3
m
m/s
l/s
Drain a Tank - Time to empty
Parameters for circular tank
Tank Diameter
Tank S.A.
Initial Flowrate
Nozzle area
Nozzle (C)
Nozzle area par
Time (sec.)
0
1
2
3
4
5
6
7
8
9
10
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12
13
14
15
16
17
18
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20
21
22
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24
25
26
27
28
29
30
31
32
33
34
35
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39
40