Reynold's Number : It is the ratio of inertia force of a flowing fluid and the viscous force of the fluid.
Froude's Number: It is defined as the square root of the ratio of inertia force of a flowing fluid to the gravity force.
Euler's Number: It is defined as the square root of the ratio of the inertia force of a flowing fluid to the pressure force.
Weber's Number: It is defined as the square root of the ratio of the inertia force of a flowing fluid to the surface tension force
Mach's Number: It is defined as the square root of the ratio of the inertia force of a flowing fluid to the elastic force.
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