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How does changing the speed of fluid affect its pressure?

Last updated date: 05th Mar 2024
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IVSAT 2024
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Hint: The pressure is defined as the force applied perpendicular to the surface of an object per unit area. Atmospheric pressure, Absolute pressure and Gauge pressure are the various types of pressure. The SI unit of pressure is Pascal.

Complete step by step answer:
According to Bernoulli's principle, as the speed of the moving fluid increases then the pressure within the fluid decreases. The principle explains the behavior of an ideal fluid passing through the pipe or the pump.

Bernoulli's principle also states that the rise or fall in the static pressure in a flowing fluid will be accompanied by the decrease or increase in the speed of the fluid and similarly, the increase or decrease in the speed of the fluid results in the increase or decrease in the static pressure.

In general, the change in the pressure will have little effect on the volume of the liquid. We also know that the liquids are relatively incompressible because any increase in the pressure can reduce the distance of the closed packed molecules slightly. Thus, if the pressure above the liquid is increased then the liquid forms a solid.

Whenever the temperature is increased, the kinetic energy of the gas molecules and the average speed also increases. If the volume is maintained at constant then the increased speed of the gas molecules will result in more frequent and more forceful collisions with the wall of the container thereby increasing the pressure.

Note: The pressure depends on the force, the area, and also on the number of atoms or molecules in the given space. This pressure works in all directions as the particles in a liquid are tightly packed.
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