Test and Measurement World Terminology Section

One Stop For Your Test and Measurement Need

Static Pressure Vs Dynamic Pressure | Difference between Static Pressure and Dynamic Pressure

This page compares Static Pressure vs Dynamic Pressure and mentions difference between Static Pressure and Dynamic Pressure.

Pressure of the fluid contained in container is defined as force per unit area exerted by fluid on the container wall.

Static Pressure

Definition:
When the fluid is in equilibrium, the pressure at a point is identical in all the directions and it is independent of orientation. This is known as static pressure. Here static refers to "still or standing".

➨It can be expressed as ratio of force to surface area. (Static Pressure = F/A)
➨It is calculated in units of PSI (Relative to Atmosphere) or MPa (Megapascal, relative to Vacuum).


Dynamic Pressure

Definition:
When pressure gradient occur within a continuum of pressure, the attempt to restore equilibrium results in fluid flow from regions of high pressure to regions of low pressure. In this case, pressures are no longer independent of directions and are known as dynamic pressure. Here dynamic refers to "moving".

Example: Fluid moving in a piece of pipe is known as dynamic pressure. Fluid can be water or steam etc. It is also called moving pressure.

➨Dynamic pressure is much like the kinetic energy. It is kinetic energy per unit volume of a fluid particle.
➨It is calculated as per following equation.
Dynamic Pressure = (ρ/2 )* V2,
Where ρ = Density of liquid in kg/m3
V = Speed with which fluid is moving in m/s

The unit of dynamic pressue is Pascals.



What is difference between or comparison between

Following links mention difference or comparison between various equipments and terms:
comparison between SPI and I2C
difference between PXI and PCI
Microscope vs Telescope
Amplitude Modulation vs Angle Modulation
difference between modem and router
Air Fuel Ratio Sensor vs O2 Sensor
Radiometer vs Spectrometer vs Spectroradiometer
Clamp meter vs digital multimeter
Colorimeter vs Spectrophotometer
difference between Prism and Grating
difference between Venturi meter and Orifice meter
difference between Lux and Lumens




Share this page

Translate this page

Latest Posts