Friday, July 11, 2008

Bernoulli’s equation

Revison material

Bernoulli’s equation relates the speed of a fluid at a point, the pressure at that point and the height of that point above a reference level. It is an application of work-energy theorem in the case of fluid flow.

P1 + ρgh1 + ½ ρv1² = P2 + ρgh2 + ½ ρv2²

P + ρgh + ½ ρv² = constant

P = pressure
ρ = density of liquid
g = acceleration due to gravity
h = height of above the reference level
v = velocity of the fluid

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