page_title: Types of mesh
section_title: Equiangular skew
hierarchical_section_title: Types of mesh / Deciding the type of mesh / Skewness / Equiangular skew
caption_attribution_description: English: Depicts the variation in the aspect ratio of the cell.
context_page_description: A mesh is a representation of a larger geometric domain by smaller discrete cells. Meshes are commonly used to compute solutions of partial differential equations and render computer graphics, and to analyze geographical and cartographic data. A mesh partitions space into elements over which the equations can be solved, which then approximates the solution over the larger domain. Element boundaries may be constrained to lie on internal or external boundaries within a model. Higher-quality elements have better numerical properties, where what constitutes a "better" element depends on the general governing equations and the particular solution to the model instance.
context_section_description: Another common measure of quality is based on equiangular skew.
  where:
   is the largest angle in a face or cell,
   is the smallest angle in a face or cell,
   is the angle for equi-angular face or cell i.e. 60 for a triangle and 90 for a square.
  A skewness' of 0 is the best possible one and a skewness of one is almost never preferred. For Hex and quad cells, skewness should not exceed 0.85 to obtain a fairly accurate solution.
  For triangular cells, skewness should not exceed 0.85 and for quadrilateral cells, skewness should not exceed 0.9.
caption: Depicts the changes in aspect ratio
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