Bernoulli Fluid Pressure & Venturi Effect Calculator
Calculate downstream fluid pressure, dynamic velocity head loss, Venturi throat speeds, and elevation head using Bernoulli's equation.
Calculated Results
Frequently Asked Questions
What does Bernoulli's principle state in fluid dynamics?
Bernoulli's principle states that an increase in the speed of a moving fluid occurs simultaneously with a decrease in static pressure or fluid potential energy: P + ½ρv² + ρgh = constant along a streamline.
What is the Venturi effect?
The Venturi effect is the reduction in fluid pressure that occurs when a fluid flows through a constricted section (or choke) of a pipe. Because mass flow rate must remain constant, velocity increases in the narrow section, forcing static pressure to drop.
How much pressure is lost per foot of vertical water elevation?
Water exerts a hydrostatic head pressure of exactly 0.4335 PSI per vertical foot of elevation rise (or 2.31 feet of water column per 1.0 PSI). Pumping water upward 10 feet drops static line pressure by 4.33 PSI.
How does Bernoulli's principle create airplane wing lift?
Air travels faster over the curved upper surface of an airfoil than under the flat bottom surface. By Bernoulli's principle, the faster air creates lower pressure above the wing, generating an upward aerodynamic lift force.