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Inst Tools > Blog > Practical Questions > Calculate Total Hydrostatic Pressure at Bottom of Vessel

Calculate Total Hydrostatic Pressure at Bottom of Vessel

A vessel contains three different liquids : glycerine, water, and olive oil. Calculate total hydrostatic pressure at the bottom of the vessel.

Last updated: November 6, 2020 9:41 am
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A vessel contains three different liquids of different specific gravities: glycerine, water, and olive oil.

These three liquids settle at different levels in the vessel, so that there is a 3 foot deep layer of glycerine, a 2 foot deep layer of water, and a 4.5 foot deep layer of olive oil:

Hydrostatic Pressure

Calculate Total Hydrostatic Pressure at Bottom of Vessel

Calculate the total hydrostatic pressure at the bottom of the vessel, in units of PSI and kPa?

Answer:

Hydrostatic pressure due to 3 feet of glycerine (SG = 1.26)

(1.26)(3 feet)(12 in / 1 ft)(1 PSI / 27.6807 ”W.C.) = 1.639 PSI

Hydrostatic pressure due to 2 feet of water (SG = 1.00)

(1.00)(2 feet)(12 in / 1 ft)(1 PSI / 27.6807 ”W.C.) = 0.867 PSI

Hydrostatic pressure due to 4.5 feet of olive oil (SG = 0.918)

(0.918)(4.5 feet)(12 in / 1 ft)(1 PSI / 27.6807 ”W.C.) = 1.791 PSI

Total hydrostatic pressure = 1.639 PSI + 0.867 PSI + 1.791 PSI = 4.297 PSI = 29.6 kPa

Share your answers with us through the below comments section.

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Credits: Tony R. Kuphaldt

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