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TriKri
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How do you calculate the pressure in fluids, for example water? With gases, you can use the ideal gas law, is there some similar formula to calculate the pressure for liquids?
HallsofIvy said:To be exact, you should add the air pressure on the surface of the liquid but that is typically much smaller than the pressure of the liquid itself.
Under what fluid conditions is one interested?TriKri said:That is not what I mean. At deeper levels, the density is higher; this is what causes the higher pressure. When you do flow calculations, you need to be able to calculate the pressure as a function of the density, since the pressure is different in different locations at the same depth if the water is turbulent.
TriKri said:That is not what I mean. At deeper levels, the density is higher; this is what causes the higher pressure. When you do flow calculations, you need to be able to calculate the pressure as a function of the density, since the pressure is different in different locations at the same depth if the water is turbulent.
The formula for calculating pressure in liquids is P = ρgh, where P is pressure, ρ is density, g is acceleration due to gravity, and h is the depth of the liquid.
Pressure in liquids is caused by the weight of the liquid above a specific point, while pressure in gases is caused by the collisions of gas molecules with the walls of the container.
Pressure in liquids is typically expressed in units of pascals (Pa) or newtons per square meter (N/m^2).
In liquids, temperature does not have a significant effect on pressure. However, as temperature increases, the density of liquids typically decreases, resulting in a slight decrease in pressure.
Yes, pressure in liquids can be greater than atmospheric pressure. This occurs when the liquid is under a greater depth or when an external force is applied to the surface of the liquid.