Applications of Vortex Gas Models to Tornadogenesis and Maintenance

Bělík, Pavel; Dokken, Douglas P.; Potvin, Corey K.; Scholz, Kurt; Shvartsman, Mikhail M.

doi:10.4236/ojfd.2017.74040

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Applications of Vortex Gas Models to Tornadogenesis and Maintenance

2017
By Bělík, Pavel ; Dokken, Douglas P. ; Potvin, Corey K. ; ...
Source: Open Journal of Fluid Dynamics, 7, 596-622

[PDF-4.36 MB]

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Journal Title:

Open Journal of Fluid Dynamics
Personal Author:

Bělík, Pavel ; Dokken, Douglas P. ; Potvin, Corey K. ; Scholz, Kurt ; Shvartsman, Mikhail M.

Bělík, Pavel ; Dokken, Douglas P. ; Potvin, Corey K. ; Scholz, Kurt ; Shvartsman, Mikhail M. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; NSSL (National Severe Storms Laboratory) ; CIMSS (Cooperative Institute for Meteorological Satellite Studies)

OAR (Oceanic and Atmospheric Research) ; NSSL (National Severe Storms Laboratory) ; CIMSS (Cooperative Institute for Meteorological Satellite Studies) Less -
Description:

Processes related to the production of vorticity in the forward and rear flank downdrafts and their interaction with the boundary layer are thought to play a role in tornadogenesis. We argue that an inverse energy cascade is a plausible mechanism for tornadogenesis and tornado maintenance and provides supporting evidence which is both numerical and observational. We apply a three-dimensional vortex gas model to supercritical vortices produced at the surface boundary layer possibly due to interactions of vortices brought to the surface by the rear flank downdraft and also to those related to the forward flank downdraft. Two-dimensional and three-dimensional vortex gas models are discussed, and the three-dimensional vortex gas model of Chorin, developed further by Flandoli and Gubinelli, is proposed as a model for intense small-scale subvortices found in tornadoes and in recent numerical studies by Orf et al. In this paper, the smaller scales are represented by intense, supercritical vortices, which transfer energy to the larger-scale tornadic flows (inverse energy cascade). We address the formation of these vortices as a result of the interaction of the flow with the surface and a boundary layer.
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Inverse Energy Cascade Negative Temperature Supercritical Vortices Tornadogenesis Tornado Maintenance Vortex Gas
Source:

Open Journal of Fluid Dynamics, 7, 596-622
DOI:

https://doi.org/10.4236/ojfd.2017.74040
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Journal Article
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urn:sha256:60e1519ed3654ed46fac0205e8a14d07388fa4bffa3db6de7ecbe8a8c7346b7d
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Applications of Vortex Gas Models to Tornadogenesis and Maintenance

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