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[FAQ]

There are two mesh controls in ICEM that can be used to control the transitioning of the mesh away from the surface: 1) A Tetra Size Ratio can be specified for each surface. This controls the rate of growth of the mesh away from the surface. It acts like a radius of influence, extending the surface mesh control further into the domain, but still allowing the minimum size of 2 at the surface. 2) There is also a Tetra Width parameter that can be specified for surfaces. This parameter can be used to delay expansion around objects where a lot of resolution is required due to wakes or other turbulent structures, or for mechanical stresses. The number entered for “Width” on a given surface is the number of volume elements immediately off the surface that have a size of 2. Beyond that, the mesh will expand at the given Tetra size ratio until the maximum size of 16 is reached. NOTE: The Octree mesher will not obey the Tetra Size Ratio or Width controls. Its expansion ratios are dictated by the Octree meshing algorithm. You will need to run the Delauney mesher on the smoothed Octree mesh in order to get a mesh with the specified sizings.