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zeroonezero
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How do you calculate the pressure exerted by water if you know the speed?
cjl said:If all you want to know is the dynamic pressure, then you can find it for any incompressible fluid (which includes most gases, so long as the speed in question is below about mach 0.3) by simply using the equation P = 1/2ρv2.
zeroonezero said:Pardon my ignorance...the only thing I know is the speed of the water...6 knots...I have a plate 3ft sq facing that flow...How do I calculate the pressure on that plate, or any plate, in terms of psi or psf? P=1/2pv2 does not make sense to me since P, p is pressure
Pressure is the force exerted by water on a surface, while speed is the rate at which water moves through a space.
As the speed of water increases, the pressure it exerts also increases. This is due to the kinetic energy of the moving water molecules.
The viscosity, density, and temperature of water can all affect its pressure and speed. Additionally, the shape and size of the space through which the water is moving can also impact these factors.
Pressure is typically measured in units of force per unit area, such as pounds per square inch (psi) or pascals (Pa). Speed can be measured in units of distance per unit time, such as meters per second (m/s) or feet per second (ft/s).
Understanding pressure and speed of water is crucial for various industries and fields, including hydrology, engineering, and environmental science. It can also help predict and prevent potential hazards, such as floods and erosion, caused by water movements.