Question

Select a common dimensionless parameter in fluid mechanics:

A) Angular velocity
B) Kinematic viscosity
C) Specific volume
D) Specific weight

Answer 1

Specific volume is a dimensionless parameter in fluid mechanics representing the volume occupied per unit of mass, obtained as the reciprocal of density.

Step-by-step explanation:

Among the options provided, Specific volume is a common dimensionless parameter in fluid mechanics. This parameter is a measure of the volume occupied per unit of mass, commonly used in thermodynamics and fluid mechanics to describe the density of a fluid. It is found by taking the reciprocal of the fluid's density (specific volume = 1/density). The specific volume is an intrinsic property of a substance, and since it is expressed as volume per mass, the units for volume and mass cancel out, making it dimensionless. This parameter is vital in characterizing both compressible and incompressible flows.