Basic Types, shapes, Grid and Geometry Mesh used in CFD
Basics of Meshing in CFD Discretizing a domain into small elements or cells is known as meshing. Meshing is a very important part of numerical analysis. If the number of cells in a meshed domain are high the accuracy of analysis will be greater. Mesh is kept fine in the areas where capturing the physics of phenomenon is important. Mesh independence is one of the most important step in meshing. Mesh Independence is achieved by refining the mesh till the value of required variable becomes constant. Mesh refining requires high computational capabilities. Mesh can be classified into different types based on the uniformity and shape. Definitions of some elementary terms of meshing are given below (D. J. 1996). Node: Point where two or more edges meet. Edge: Boundary of a face Face: Boundary of a cell Cell: Control volume into which the domain is discretized. Zone: Grouping of nodes faces and cells Material data and source terms are assigned to cell zone whereas boundary conditions are appli