منابع مشابه
Anatomy of a bathtub vortex.
We present experiments and theory for the "bathtub vortex," which forms when a fluid drains out of a rotating cylindrical container through a small drain hole. The fast down-flow is found to be confined to a narrow and rapidly rotating "drainpipe" from the free surface down to the drain hole. Surrounding this drainpipe is a region with slow upward flow generated by the Ekman layer at the bottom...
متن کاملThe bathtub vortex in a rotating container
By A. ANDERSEN, T. BOHR , B. STENUM, J. JUUL RASMUSSEN AND B. LAUTRUP Cornell University, Department of Theoretical and Applied Mechanics, Ithaca, NY 14853, USA The Technical University of Denmark, Department of Physics, DK-2800 Kgs. Lyngby, Denmark Risø National Laboratory, Optics and Plasma Research Department, DK-4000 Roskilde, Denmark The Niels Bohr Institute, Blegdamsvej 17, DK-2100 Copenh...
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W F Vinen suggested in 1961 that the creation of quantized vortex line in superfluid 4He is impeded by an energy barrier. Measurements of the rate ν at which negative ions nucleate vortices in isotopically pure 4He have vindicated this idea. Barrier heights derived from the measured temperature dependence of ν are in good agreement with values calculated by Muirhead, Vinen and Donnelly (MVD) on...
متن کاملSuperfluid Vortex Nucleation
In an earlier paper 2] the author introduced a nonlinear Schrr odinger model for superruid that captures the process of mutual friction between the super-uid and normal uid components of helium II. Topological defects in the solution of this equation are identiied as superruid vortices, and in that paper, an asymp-totic dynamics for the vortices was derived in the case they are widely separated...
متن کاملThe Cantorian Superfluid Vortex Hypothesis
The present article suggests a preliminary version of Cantorian superfluid vortex hypothesis as a plausible model of nonlinear cosmology. Using the proposed model we explain the physical origin of quantum-like approach to describe planetary orbits as proposed in the recent literature. The meaning of the Cantorian superfluid vortex hypothesis is discussed, particularly in the context of offering...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2020
ISSN: 2469-9950,2469-9969
DOI: 10.1103/physrevb.102.224511