# Fluids undergo volume change under external pressure due to

34 views
in General
closed
Fluids undergo volume change under external pressure due to
1. Plasticity
2. Viscosity
3. Tenacity
4. Compressibility

by (48.1k points)
selected

Correct Answer - Option 4 : Compressibility

Explanation:

Tenacity:
The tenacity of a body is represented by the greatest longitudinal stress per unit of cross section that it can bear without rupture.

Plasticity:
It is the property of material to undergo a non-reversible change of shape in response to an applied force.

Viscosity:

The property which opposes the relative motion between two adjacent layers in a fluid is known as viscosity.

Compressibility (α):

It is the measure of the change in volume or density of matter under the application of pressure. It is given as an inverse of the bulk modulus.

${\rm{\alpha }} = \frac{1}{{\rm{K}}}$

Bulk modulus (K):

It is the measure of pressure required to create a change in volume per initial volume.

${\rm{K}} = \frac{{ - {\rm{dp}}}}{{\frac{{{\rm{dv}}}}{{\rm{v}}}}}$

Compressible and incompressible flow:

The compressibility of flow is decided based on volumetric strain and not on bulk modulus

$\frac{{{\rm{dV}}}}{{\rm{V}}} \le 0.05,{\rm{then\ the\ flow\ is\ incompressible}}$

$\frac{{{\rm{dV}}}}{{\rm{V}}} > 0.05,\;{\rm{then\ the\ flow\ is\ compressible}}$