Scale: Major radius = 3, minor radius = 1, time step = 0.01. Initially 512 vertices, finally 546. Initially 1024 facets, finally 1088. The interface becomes singular after 516 steps. The center vertices were identified in an appropriate manner after 500 steps to extend the flow beyond the singularity
System: Hewlett-Packard HP-UX 9000/725. Computation time: About 2 hours, 40 minutes to reach the singularity and another 12 hours, 50 minutes afterwards.
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