An experimental study on hurricane mesovortices

@article{Montgomery2002AnES,
  title={An experimental study on hurricane mesovortices},
  author={Michael T. Montgomery and Vladimir A. Vladimirov and Petr Denissenko},
  journal={Journal of Fluid Mechanics},
  year={2002},
  volume={471},
  pages={1 - 32}
}
Mesovortices in the eyewall region of a hurricane are intriguing elements of the hurricane engine. In-situ measurements of them are sparse, however, and our understanding of their overall role in the physics of a hurricane is incomplete. To further understand their dynamics an experimental apparatus using a homogeneous fluid (water) has been constructed to emulate the lower tropospheric flow of the hurricane eye/eyewall region. For experimental configurations possessing a central aspect ratio… 
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References

SHOWING 1-10 OF 103 REFERENCES
Some Aspects of Hurricane Inner-Core Dynamics and Energetics
Abstract The energy cycle of the mature hurricane resides in the secondary circulation that passes through the storm’s eyewall. By equating the generation of energy in this cycle to boundary layer
Forced secondary circulations in hurricanes
In this study, application of Eliassen's (1951) forced secondary circulation model to the hurricane vortex is reexamined. It is shown by scale analysis that the symmetric tangential flow is in
Spiral Bands in a Simulated Hurricane. Part I: Vortex Rossby Wave Verification
Abstract An initially axisymmetric hurricane was explicitly simulated using the high-resolution PSU–NCAR nonhydrostatic mesoscale model (MM5). Spiral potential vorticity (PV) bands that formed in the
Unstable Interactions between a Hurricane's Primary Eyewall and a Secondary Ring of Enhanced Vorticity
Intense tropical cyclones often exhibit concentric eyewall patterns in their radar reflectivity. Deep convection within the inner, or primary, eyewall is surrounded by a nearly echo-free moat, which
Mesovortices, Polygonal Flow Patterns, and Rapid Pressure Falls in Hurricane-Like Vortices
Abstract The present work considers the two-dimensional barotropic evolution of thin annular rings of enhanced vorticity embedded in nearly irrotational flow. Such initial conditions imitate the
The Response of Balanced Hurricanes to Local Sources of Heat and Momentum
Abstract Eliassen's (1951) diagnostic technique is used to calculate the secondary circulation induced by point sources of heat and momentum in balanced, hurricane-like vortices. Scale analysis
Polygonal Eyewalls, Asymmetric Eye Contraction, and Potential Vorticity Mixing in Hurricanes
Hurricane eyewalls are often observed to be nearly circular structures, but they are occasionally observed to take on distinctly polygonal shapes. The shapes range from triangles to hexagons and,
The Asymmetric Boundary layer Flow Under a Translating Hurricane
Abstract An investigation is made of the role of the translation of a hurricane in determining the distribution of boundary layer winds and in the organization of convection. A slab boundary layer
The Exploration of Certain Features of Tornado Dynamics Using a Laboratory Model
Abstract Three characteristic features of tornadoes are simulated in a laboratory system and the associated flow is observed and discussed. These are (i) a characteristic surface pressure profile,
On the Dynamics and Energy Transformations in Steady‐State Hurricanes
A dynamic model of the inflow layer in a steady mature hurricane is evolved, relating wind speed, pressure gradient, surface shearing stress, mass flow, and convergence. The low-level air
...
...