recon
This command flips connections in the mesh to get restore the Delaunay criterion or to improve element shapes.
recon / [1 | 0] / [damage]
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Parameters
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Type/Value
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Description/Default
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1
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Adds points on the boundaries if needed. recommended for 2D meshes only
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0
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Specifies that no points are to be added on the boundaries. This is the default.
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damage
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damage
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If specified then flips on exterior boundaries are checked to verify that the maximum depth of deformation of the external boundary does not exceed the value of damage. The default value of damage is 1% of the problem size. This setting prevents connecting across corners if the external boundary is a reflective box.
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The standard method used by recon is to flip connections based on the in-sphere test (the circumsphere of a tetrahedral element should contain no other nodes). Additional flipping criteria are available. The Minimum Error Gradient Adaption (mega) can be invoked by changing the value of the code variable ivoronoi(assign///ivoronoi/-2). The effect of this option is to generate well shaped elements; however the grid will not be Delaunay. If the user has a function to used for adaptive reconnection this option is available by setting the code variable ivoronoi to 2 (assign///ivoronoi/2). The user will have to supply an external function.
recon
attempt to restore Delaunay
assign / / / ivoronoi / -2
recon
attempt to improve geometric mesh quality
recon / 1
for 2d meshes add nodes on boundaries to guarantee Delaunay
recon / / .001
reconnect limit interface and boundary damage to a maximum of .001.