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Tank drainage time

Input data

Width

Length

Height

Diameter

Output data

Time

Description

Given the dimensions of the tank surface and the vertical distance between the water surface and the axis outlet section, this calculation determines the drainage time of the tank.

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Input and Output Parameters

Inputs

Parameter
Standard Units
Description
Width (a)
m
Width of the tank horizontal section
Length (b)
m
Length of the tank horizontal section
Height (y)
m
Vertical distance between the water surface and the outlet axis
Diameter (d)
mm
Diameter of the outlet pipe

Output

Parameter
Standard Units
Description
Time (t)
s
Time required to drain the tank

Formula

t=0.74⋅a⋅b⋅yπ4⋅d2t = \frac{0.74 \cdot a \cdot b \cdot \sqrt{y}}{\frac{\pi}{4} \cdot d^2}

References

  • VIANNA, Marcos R. Hidráulica aplicada às estações de tratamento de água. 6. ed. Belo Horizonte, 3I, 2019.