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@@ -0,0 +1,23 @@ +CVS info : $Header$ + +Cactus Code Thorn RotatingSymmetry90 +Thorn Author(s) : Erik Schnetter <schnetter@aei.mpg.de> +Thorn Maintainer(s) : Erik Schnetter <schnetter@aei.mpg.de> +-------------------------------------------------------------------------- + +Purpose of the thorn: + +Provide a 90 degree rotational symmetry boundary condition. This is +the kind of symmetry that exists e.g. in a singl black hole evolution +when the black hole has spin. The same setup also admits an +additional bitant symmetry. + +Currently the symmetry is fixed to be located at the lower x and y +boundaries, so that there is a rotation about the z axis. + +The coordinate thorn does not know about this symmetry. You will have +to set up the domain such that you have an upper quadrant in the x and +y directions. + +This symmetry boundary condition can be mixed with arbitrary symmetry +conditions in the z direction, e.g. bitant or periodicity. |