*MESH,<min. angle>,<max. bad angle ratio>,< number of iterations >,<max. relative element size>
Sets meshing parameters.
min. angle: desired minimum angle for the elements. Reasonable values range from approximately 20 to 33°. Setting larger values may lead to the mesh not converging.
max. bad ratio: maximum acceptable ratio of bad triangles (not respecting the minimum angle condition above) in the mesh. Default value is 0.05 (5 %) which is reasonable. In most cases, the actual value is zero.
number of iterations;: 2
max relative element size: ratio of the maximum allowed element size to the maximum diagonal of a rectangle containing the mesh. Default value is 0.1. Setting this value to 1 will generate a minimum number of triangles (still respecting the minimum angle condition above). PLESE BE CAREFUL when selecting smaller values, as the number of elements and nodes generated increase quadratically. A fine mesh typically corresponds to a value of 0.03.