Distorted mesh elements - how distorted can they be?
Altair EmployeeAnswers
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When using the Find distorted mesh elements tool in CADFEKO with the default setting of 20 degrees, users may find that there are a number of distorted mesh elements in their model.
In ideal circumstances one would want elements with internal angles of 60 degrees, but this is rarely possible. FEKO does not directly test for distorted mesh elements. However, the consequence of distorted mesh elements is that the condition number for the MoM matrix increases, and for this FEKO will give a warning or an error when it becomes too high. Distorted elements can also lead to poor convergence for iterative solvers.
If there are no warnings about coarse meshing or condition numbers, the results should generally be acceptable, although a less distorted mesh would generally yield more accurate results.
As always, mesh convergence testing must be done to confirm results.
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