What is a mesh?
Algorithms that produce meshes are called meshers and there are three broad types:
- Structured – typically producing hexahedra
- Unstructured – producing mainly tetrahedra with some generating semi-structured prisms adjacent to walls
- Cartesian – regular axes-aligned cells with a special treatment near walls
The density and size of cells within a mesh have a primary influence on the subsequent results obtained. Typically the higher the cell density and the smaller the cell size, the more accurate results tend to be. However, the higher accuracy comes with the penalty of slower turnaround time. Striking the right compromise between accuracy and turnaround time can be difficult.
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