An Overview on basics of Computational Fluid Dynamics

Abstract

CFD – Computational Fluid Mechanics gives mathematical approximation for the equations which control motion of fluid. CFD application to analyse the problem of a fluid involves the following stages. Firstly, the numerical expressions defining the flow of fluid were developed. They are generally a collection of PDE – Partial Differential Equations. These solutions are then partitioned to provide a mathematical counterpart of the expressions. The area is then partitioned into little grids or elements. Finally, the initial circumstances as well as the initial conditions of given problem are employed to solve those equations. All Computational Fluid Dynamics (CFD) codes comprise three basic elements: (1) A pre-processor, that is utilized to feed the issue geometry, create the grid, as well as explain the flow parameter as well as the initial conditions to a code. (2) A flow solver, that is used to solve the governing equations of flow pursuant to the conditions specified. There are 4 distinct approaches utilized as a flow solver: I finite difference technique; (ii) finite element technique, (iii) finite volume technique. (3) A post-processor, that is used to manipulate the information and provide the outcomes in graphical & easy to read manner.