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<\/p>\nIntroduction<\/p>\n
Mesh control in process simulators is one of the major issues tackled by any user. Over the years the meshing algorithms with\u00a0SSuprem4<\/b>\u00a0and\u00a0ATHENA<\/b>\u00a0have been improved to the stage where most arbitrary structures can be solved. New approaches such as automated\u00a0ADAPTIVEMESH<\/b>\u00a0algorithms or standalone programs such as\u00a0DevEdit<\/b>\u00a0exist to help users. However there is often no substitute for a firm grasp of the basic methods of mesh control within\u00a0ATHENA<\/b>. This article discusses six basic principles that can be used to both avoid meshing problems, and correct problems when they occur. These principles are also relevant for\u00a0ATLAS<\/b>.<\/p>\n
Sometimes a small change in a previously working\u00a0ATHENA<\/b>\u00a0input file can suddenly have a mesh-related error, and cause the simulation to fail. Typically,\u00a0ATHENA<\/b>\u00a0will state that it failed an internal self-test check and it recommends that you change the mesh. The small change probably did not cause the mesh error, rather, problems with the mesh existed beforehand, but were not serious enough to cause\u00a0ATHENA<\/b>\u00a0to fail.<\/p>\n
1. Avoid Discontinuities of Mesh Size<\/p>\n
Initial Mesh Formation<\/p>\n
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