Computational Fluid Dynamics

                The art of replacing the partial differential equations of fluid flow with number, this number is spaced and time to obtain a final numerical description of the complete flow field of interest.

The fluid flow is governed by Three Fundamental Principle:

• Mass is conserved

• F = ma (Newton’s 2 law)

• Energy is conserved

Equation most general form is in PDF

Role of CFD

• Round off errors are compromises to get the accuracy in CFD RESULT.
• To carry out numerical experiments help study the fundamental characteristics of the flow. These numerical are directly analogous to actual laboratory experiments.

Types of fields handled by CFD

• Flow field over the space shuttle

• Flow over wing body

• Unsteady, Oscillating flow through supersonic engine inlets

• Flow field over an automobile

• Flow through supersonic combustion ramjet engine

Flow fields cannot be computed by CFD

• Turbulence model

• Chemically reacting flow

      

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