Horizontal rolls over localized heat source in a cylindrical layer

Sukhanovskii, A.; Evgrafova, A.; Попова, Е. Н.

doi:10.1016/j.physd.2015.11.007

Cited by 29 publications

(21 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…PIV measurements showed that the general structure of mean radial and azimuthal flows in the proposed model is similar to the typical structure of a hurricane [8]. In the boundary layer of cyclonic vortex secondary convective structures in the shape of horizontal rolls were observed [8]. There is remarkable similarity of these secondary flows and rainbands in real tropical cyclones [9,10].…”

Section: Introductionsupporting

confidence: 54%

“…Detailed description of the basic flow structure can be found in [13] but brief description of the general structure of the large-scale flow is necessary for a better understanding of the results. The heat flux in the central part of the bottom is a source of the intensive upward motion above the heater.…”

Section: Resultsmentioning

confidence: 99%

“…We can conclude that for the described parameters the variation of the geometric sizes of the vessel for fixed Rayleigh number does not substantially change the structure of the main large-scale flow. flows over the heater in the case of non-rotating cylindrical layer are described in detail in [13]. Secondary flows visualized by shadowgraph technique are presented in figure 5.…”

Section: Resultsmentioning

confidence: 99%

“…Such system was proposed as a laboratory model of tropical cyclone [7]. PIV measurements showed that the general structure of mean radial and azimuthal flows in the proposed model is similar to the typical structure of a hurricane [8]. In the boundary layer of cyclonic vortex secondary convective structures in the shape of horizontal rolls were observed [8].…”

Section: Introductionmentioning

confidence: 99%

“…Secondary flows may significantly influence on heat and mass transfer in the boundary layer [11,12]. The nature and characteristics of secondary flows over heating area in a non-rotating cylindrical layer were studied in [13]. Various types of visualization revealed co-existence of radial and transverse convective rolls.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Influence of geometrical parameters on convective flows in non-uniformly heated cylindrical fluid layers

Evgrafova

Sukhanovskii

Kuchinskii

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

Self Cite

View full text Add to dashboard Cite

Abstract. Convection in a fluid layer with a free surface in a cylindrical container nonhomogeneously heated from below was studied experimentally. The heater has a circular form and was placed in the center of the vessel. Such a system in the presents of rotation is very promising for studying the nature of tropical cyclones. In current paper we considered the influence of different geometric parameters on the dynamics of convection flows. For it two experimental setups of different sizes were used. Measurements were done for fluids with different values of Prandtl number and heating powers. It was shown that the structure and intensity of mean flow producing by a horizontal temperature gradient are defined by Rayleigh number Ra. The basic flow leads to unstable temperature stratification over the heating area and the formation of a system of secondary flows. The formation of secondary flows depends on characteristics of thermal boundary layer and is described by local Rayleigh number Ra δ .

show abstract

Section: Introductionsupporting

confidence: 54%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Influence of geometrical parameters on convective flows in non-uniformly heated cylindrical fluid layers

Evgrafova

Sukhanovskii

Kuchinskii

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

Self Cite

View full text Add to dashboard Cite

show abstract

Laboratory study of a steady‐state convective cyclonic vortex

Sukhanovskii

Evgrafova

Попова

2016

Quart J Royal Meteoro Soc

Self Cite

View full text Add to dashboard Cite

An experimental study of the steady-state cyclonic vortex from an isolated heat source in a rotating fluid layer is described. The structure of the laboratory cyclonic vortex is similar to the typical structure of tropical cyclones from observational data and numerical modelling, including secondary flows in the boundary layer. Different constraints of the steady-state hurricane-like vortex were studied. The three main dimensional parameters that define the vortex structure for a fixed geometry -heating flux, rotation rate and viscosity -were varied independently. Characteristics of the steady-state cyclonic vortex were measured experimentally for different values of kinematic viscosity (from 5 to 25 cSt), rotation rate (from 0.04 to 0.17 rad s −1 ) and heat flux (from 1 to 4.6 kW m −2 ). The crucial importance for the vortex formation has angular momentum exchange in the viscous boundary layer. It was shown that viscosity is one of the main parameters that define the steady-state vortex structure. Increasing the kinematic viscosity may substantially suppress the cyclonic motion for fixed values of buoyancy flux and rotation rate. Strong competition between buoyancy and rotation provides the optimal ratio of the heating flux and rotation rate for achieving a cyclonic vortex of maximal intensity. It was found that relatively small variation of the rotation rate for the fluids with low kinematic viscosity may remarkably change the cyclonic vortex structure and intensity.

show abstract

The Importance of Horizontal Rolls in the Rapid Intensification of Tropical Cyclones

Sukhanovskii

Попова

2020

Boundary-Layer Meteorol

View full text Add to dashboard Cite

Horizontal rolls over localized heat source in a cylindrical layer

Cited by 29 publications

References 42 publications

Influence of geometrical parameters on convective flows in non-uniformly heated cylindrical fluid layers

Influence of geometrical parameters on convective flows in non-uniformly heated cylindrical fluid layers

Laboratory study of a steady‐state convective cyclonic vortex

The Importance of Horizontal Rolls in the Rapid Intensification of Tropical Cyclones

Contact Info

Product

Resources

About