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Pressure Coefficient

The ratio of pressure forces to inertial forces

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The pressure coefficient is is the ratio of pressure forces to inertial forces and can be expressed as

Cp = dP / (ρ v2 / 2)

    = dh (ρ v2 / 2 g)                                       (1)


Cp = pressure coefficient

dp = pressure difference (N)

ρ = fluid density (kg/m3)

v = flow velocity (m/s)

dh = head (m)

g = acceleration of gravity (= 9.81 m/s2)

The pressure coefficient is important in most fluid flow applications.

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