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Tuesday, July 28, 2020 | History

2 edition of Supercritical tornado-like vortices found in the catalog.

Supercritical tornado-like vortices

Burkett Reed Carver

Supercritical tornado-like vortices

photogrammetry applied to an investigation of core radii and core region velocities

by Burkett Reed Carver

  • 396 Want to read
  • 31 Currently reading

Published .
Written in English

    Subjects:
  • Vortex-motion,
  • Aerodynamics,
  • Dynamic meteorology

  • Edition Notes

    Statementby Burkett Reed Carver III
    The Physical Object
    Pagination145 leaves :
    Number of Pages145
    ID Numbers
    Open LibraryOL18018718M

      However, the standard design requires well-defined approach flow conditions to ensure the reliability of the structure. In practice, these conditions are frequently ignored due to space restrictions and the fact that several inflow branches may arrive at various elevations with supercritical . Search the information of the editorial board members by name. Research of Impact of Geografical Latitute and Residual Ionospheric Noises on Informativeness of Measuring of Zenith Wet Delay of GPS Signals. A. Sh. Mehdiyev, R. A. Eminov, N. Y.

    Three-dimensional simulations of tornado-like vortices are presented. The simulations are from a numerical model of the incompressible Navier-Stokes equations, with a Reynolds number, based on scales of the entire recirculating updraft, of up to ×Ina companion axisymmetric model, the theory for the corner flow swirl ratio provides an. The three-component velocity fields in two adjacent cross-sections of the tornado-like vortex were measured by dual-plane stereoscopic PIV. Single vortex column was formed in the center of the tank. While the vortex core was dominated by an upward flow, abrupt velocity deficit at the center of vortex was observed in the axial component of mean.

      Both in the earth’s atmosphere and on the earth’s surface, electromagnetic forces of a understandable nature act. Despite the fact that these forces are quite substantial, their participation in the phenomena occurring on the Earth’s surface and in the Earth’s atmosphere is traditionally ignored. Such a tradition does not allow explaining the nature of a number of phenomena occurring. Boubnov B.M. () On Turbulization of the Tornado-Like Vortices and Transition to a System of Vortices. In: Gavrilakis S., Machiels L., Monkewitz P.A. (eds) Advances in Turbulence VI. Fluid Mechanics and its Applications, vol


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Supercritical tornado-like vortices by Burkett Reed Carver Download PDF EPUB FB2

The shape of the funnel of a tornado-like vortex formed in a humid atmosphere above the water surface (lakes, seas, oceans) is discussed. An equation that describes the funnel shape of the tornado-like vortices is derived. We have modified the obtained funnel profiles and their dependence on the flow rate using the modified data of humidity changes with altitude in the free by: 1.

SUPERCRITICAL TORNADO-LIKE VORTICES—A LABORATORY STUDY Christopher R. Church*, Karen A. Kosiba#, J. David Cleland**, and Christopher P. Beer Miami University, Oxford, Ohio #Purdue University, West Lafayette, Indiana **Rota Skipper Corporation, South Holland, Illinois 1.

INTRODUCTION Observations of tornadoes in the field and. @MISC{_the, author = {}, title = { THE FORMATION AND INTENSIFICATION OF SUPERCRITICAL TORNADO-LIKE VORTICES—A LABORATORY STUDY}, year = {}} Share. OpenURL. Abstract.

Observations of tornadoes in the field and laboratory investigations of tornado-like end-wall vortices have both demonstrated the complexity of. THE FORMATION AND INTENSIFICATION OF SUPERCRITICAL TORNADO-LIKE VORTICES—A LABORATORY STUDY.

Abstract. Observations of tornadoes in the field and laboratory investigations of tornado-like end-wall vortices have both demonstrated the complexity o Year: OAI identifier. In Trapp and Fiedler (), the OD did not appear until after a tornado-like vortex was well formed, hence, the OD was an effect.

On the other hand, Klemp and Rotunno () and Wicker and Wilhelmson () simulated submesocyclone-scale vortices that proceeded OD by: This supercritical, end-wall vortex undergoes a transition to a subcritical vortex aloft through a vortex breakdown. We construct a model for the maximum intensity of these vortices by developing a model for the end-wall vortex and by finding the criterion for a vortex breakdown to be in steady suspension above the lower end wall.

Though the suction vortices in Figure 1(b) are multiple, this tornado would usually not be regarded as a multiple‐vortex tornado, such as the one providing illustration in Bluestein ().As seen from the farther vantage point of Figure 1(a), the tornado is a classic single vortex.

Note there is a hint of a suction vortex at the base of the tornado as seen in Figure 1(a). In a first step, the problem of inviscid axisymmetric flow with buoyancy is investigated.

It is found that both supercritical and subcritical vortex flows depart from their critical flow states if they are dominated by buoyancy. In a second step, the effects of entrainment are also taken into account. Convection heat transfer of supercritical pressure CO 2 in various channels has extensive applications in many industries.

In some applications, the channel may not be straight, but rather serpentine. Researchers have found that the transition to turbulence of constant-property fluid is delayed in a constant-curvature pipe, whereas it is promoted in a serpentine tube with alternating.

Heat Transfer Enhancement and Coordination Optimization for Supercritical CO2 Heat Exchanger: /ch The heat transfer performance of supercritical CO2 (sCO2) in straight and three enhanced tubes were presented firstly, and then a distributed coordination.

Here, we do not see suction vortices, but rather the tornado itself is a single intense vortex that is only a little larger than the suction vortices of CTRL and SR The extreme gusts associated with this case, as shown in Fig.

8, are associated with rapid oscillations in the size and intensity of this vortex (see also Figs. 7d and 7e). The supercritical wing, conceived by Richard Whitcomb in the s, gives aircraft increased cruising speed, greater fuel efficiency, and a greater range.

It's now commonplace on subsonic commercial transports. In the s, s were involved in a series of accidents during airport approaches, which called attention to the wake vortex problem. Surface pressure measurement is a general tool for evaluating wind flow qualitatively and quantitatively.

Due to its complex temporal and spatial features, modal analysis is an interesting tool to. in axisymmetric numerical simulations of tornado‐like vortices, Atmosphere-Ocean,most damaging tornadoes could be occurrences of supercritical end-wall vortices. This study focuses on internal pressures and wind forces on a gable roof of a low-rise building with an opening in the roof corner in stationary torna.

The model agrees well with previous experimental simulations of tornado-like vortices in the Purdue tornado vortex chamber a steady end-wall vortex adjacent to the lower boundary can have a.

Diwakar Natarajan, Horia Hangan, Large eddy simulations of translation and surface roughness effects on tornado-like vortices, Journal of Wind Engineering and Industrial Aerodynamics, /,(), (). To figure out the abnormal flow characteristics and thermal performance of supercritical fluids, some detailed information of supercritical pressure n-decane flowing in a horizontally round pipe is studied in terms of secondary flow induced by the huge density change or buoyancy force.

A New Scaling for Tornado-Like Vortices DAVID S. NOLAN Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, Florida (Manuscript received 1 Aprilin final form 19 November ) ABSTRACT A new approach is presented for the nondimensionalization of the Navier–Stokes equations for tornado-like vortices.

acts!as!asort!of!‘super!friction’,!allowingzerofluid!velocityalongthe!desired!boundary. When!a!“free!slip”!condition!is!enabled,!it!does!just!the!opposite. Vortex shafts for supercritical approach flow can also be used, but the intake structure may have relatively high cost due to the complex geometry.

The present study includes experimental results of a specific investigation on the changes to be made in the supercritical approach channel if a subcritical vortex intake is used.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.More likely, the supercritical end-wall vortices exist as non-axisymmetric, and possibly multiple, suction-vortex events near the surface [6,8].

Though the core radius could be diminished by working with higher values of R e F and greater resolution, such simulations stray from useful application to storm models, where a value of R e F based on.