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...
متن کاملA Bathtub Model of Traffic Congestion
In the standard economic models of traffic congestion, traffic flow does not fall under heavily congested conditions. But this is counter to experience, especially in the downtown areas of most major cities during rush hour. This paper presents a bathtub model of traffic congestion. The height of water in the bathtub corresponds to traffic density, velocity is negatively related to density, and...
متن کاملCongestion in the bathtub
This paper presents a model of urban traffic congestion that allows for hypercongestion. Hypercongestion has fundamental importance for the costs of congestion and the effect of policies such as road pricing, transit provision and traffic management, treated in the paper. In the simplest version of the model, the unregulated Nash equilibrium is also the social optimum among a wide range of pote...
متن کاملA New Bathtub Shaped Failure Rate Model
In this paper, we introduce a new Bathtub shaped failure rate model named as x-Exponantial Model and present a comparative study with Generalized Lindley, Generalized Gamma and Exponentiated Weibull distributions.
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2003
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.91.104502