General Relativity and Gravitation 10 , 105–123 (1979).
This paper derives a time-dependent solution of the same field equations that the static drainhole manifold of Ether Flow Through a Drainhole: A Particle Model in General Relativity satisfies. The evolving drainhole throat shrinks from infinitely large to a single point, then expands back to infinitely large. The geometry is singular only at the event at which the throat pinches shut. The ether is at rest, so the drainhole neither attracts nor repels gravitational test particles.