Joukowsky Equation – My DataBook

Joukowsky Equation for Fluids

Summary
Calculate Change in Pressure in Fluids (Joukowsky Pressure)
See Also

Summary

The Joukowsky equation measures the change in pressure of a fluid resulting from a change in the fluid’s velocity and is written as:

(1) $\begin{align*}\Delta P = \rho c \Delta v\end{align*}$

where $\Delta P$ = change in pressure, $\rho$ = density, c = fluid wave speed (speed of sound), $\Delta v$ = change in velocity.

This equation is used most widely for calculating the maximum theoretical surge pressure or head resulting from instantenous valve closure in a piping or pipeline system.

Joukowsky Pressure Calculator

Calculate change in fluid pressure as a result of velocity change:
Formula:	$\Delta P = \rho c \Delta v$
	$\Delta P$ = change in pressure $\rho$ = density c = fluid wave speed $\Delta v$ = change in velocity
Density	kg/m³
Fluid Wave Speed	m/s
Change in Velocity	m/s

Result:	Pa