Triangle

Triangle is an extremely fast meshing tool for complex supermeshes including lines and points.

	Triangle is extremely fast and can handle very complex geometries.
	A triangle-generated mesh contains elements with angles slightly larger than 90°. These do usually not cause problems, but will show when purely testing for obtuse-angled triangles. Thus the checks of the Max. interior angle of triangles or of the Condition number should be preferred.

Properties

Property	Description
Quality Mesh	Applies a minimum angle for each triangle in the mesh. The higher the minimum angle is set, the more regular the generated mesh will be. On the other hand, more elements will be generated when applying a higher minimum angle.
Minimum Angle	Minimum angle for the Quality Mesh option. FEFLOW allows minimum angles of up to 30 degrees.
Forces Delauney	All triangles will be exact Delaunay, not just constrained Delaunay.
Fill Holes	All holes in the supermesh are filled automatically. Do not use this option in case that your mesh is meant to contain holes.
Delauney Algorithms	- Divide and conquer - Incremental
Quiet Mode	All messages except error messages produced by Triangle during mesh generation are suppressed. If that option is switched off, the messages are displayed in the log window.
Steiner Points Insertion	Defines how extra vertices that are not part of the input geometry are handled: - Allow at all mesh segments - Prohibit at outer mesh boundary - Prohibit at any mesh segments
Mesh Anisotropy	With an anisotropy factor of 1 (default), the x and y coordinates of the polygons, lines and points are handed over to the mesh generator as original values. Applying another factor, the y coordinates are scaled with this factor for the mesh generation. Thus, it is possible, to obtain a finer mesh vertically than horizontally or vice versa. It has to be kept in mind, however, that distorted elements may be generated by applying very small or very large factors.
Refine Polygons	Switch for refining at supermesh polygon borders.
Edge Refine Mode	Refine either at SELECTED or ALL polygon borders. Selection can be done via the tool button on top of the Meshing panel.
Polygon Gradation	Smoothness of the transition from the fine elements to coarser elements on a gamut from 1 to 10.
Polygon Target Size	Maximum side length for the elements directly at the refined border.
Refine Lines	Switch for refining at supermesh lines.
Line Gradation	Smoothness of the transition from the fine elements to coarser elements on a gamut from 1 to 10.
Line Target Size	Maximum side length for the elements directly at the refined line.
Refine Points	Switch for refining at supermesh lines.
Point Gradation	Smoothness of the transition from the fine elements to coarser elements on a gamut from 1 to 10.
Point Target Size	Maximum side length for the elements directly at the refined point.