4 March 2017

Characteristics of fluid

What is fluid :

A fluid is a substance which deforms continuously when it is subjected to external shearing forces.

Characteristics of Fluid :

  • It has no proper shape of its own but conforms to the shape of the containing vessel.
  • A fluid can be defined unambiguously as a material that deforms continuously and permanently under the application of shearing stress, no matter how small.
  • The fluid has elastic properties only under direct compression.
1. Ideal Fluid

An ideal fluid is one which has
  • No viscosity
  • No surface tension
  • Incompressible
2. Real Fluid

A Real fluid is one which has
  • Viscosity
  • Surface tension
  • Compressible
Naturally available all fluids are real fluid.