Introduction to Finite Element, Boundary Element, and Meshless Methods: With Applications to Heat Transfer and Fluid Flow
1.4 Mesh Generation
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There are basically two types of meshes: structured and unstructured. A structured mesh consists of horizontal and vertical lines that cross orthogonally at intersections called nodes. This constraint is best achieved by discretizing a physical domain that is defined by square or rectangular boundaries – the physical domain becomes the computational domain as well. Much of the early numerical simulations were conducted on problems that were first reduced to rectangular physical systems of interest.