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In previous work [GIKW21], we have presented evidence from numericalsimulations that the Type-II singularities of mean curvature flow (MCF) ofrotationally-symmetric, complete, noncompact embedded hypersurfaces constructedin [IW19, IWZ21] are stable. More precisely, it is shown in that paper that forsmall rotationally-symmetric perturbations of initial embeddings near the"tip", numerical simulations of MCF of such initial embeddings develop the sameType-II singularities with the same "bowl soliton" blowup behaviors in aneighborhood of the singularity. It is also shown in that work that for smallrotationally-symmetric perturbations of the initial embeddings that aresufficiently far away from the tip, MCF develops Type-I "neckpinch"singularities.  In this work, we again use numerical simulations to show that MCF subject toinitial perturbations that are not rotationally symmetric behavesasymptotically like it does for rotationally-symmetric perturbations. Inparticular, if we impose sinusoidal angular dependence on the initialembeddings, we find that for perturbations near the tip, evolutions by MCFasymptotically lose their angular dependence -- becoming round -- and developType-II bowl soliton singularities. As well, if we impose sinusoidal angulardependence on the initial embeddings for perturbations sufficiently far fromthe tip, the angular dependence again disappears as Type-I neckpinchsingularities develop. The numerical analysis carried out in this work is anadaptation of the "overlap" method introduced in [GIKW21] and permits angulardependence.

A numerical stability analysis of mean curvature flow of noncompact hypersurfaces with Type-II curvature blowup: II