Non-equilibrium dissipation scaling in atmospheric turbulence

Wacławczyk, Marta; Nowak, Jakub; Malinowski, Szymon P.

doi:10.1088/1742-6596/2367/1/012032

Cited by 2 publications

(2 citation statements)

References 14 publications

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“…The above mentioned pattern of non-equilibrium doesn't fit the Richardson-Kolmogorov theory since the generation mechanism of such a pattern probably includes a critical threshold. Research on the detection of turbulence states indicated the existence of non-equilibrium scaling in laboratory experiments as well as in the atmosphere [43].…”

Section: The Cooling Effect Of the Aerosol Dropletsmentioning

confidence: 99%

Multiple Consequences Related to Atmospheric Turbulence Induced by the Climate Change in the Heatwaves Emergence and in the Cooling Effect of Aerosols

Roman

2024

IJEMA

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When dealing with the general problem of turbulence there are several theoretical and practical related problems: the generation (origin) of fluid fluctuations (real eddies and mathematical vorticity), the turbulent transfer of kinetic energy, heat and mass, drag resistance, clean-air fluctuations, hurricanes and tornadoes, atmospheric circulation and plumes, and other natural or human-induced phenomena. We are tempted by the intent to formulate a unified approach, where turbulence is the general feature of these problems. We attempt here to draw some connections between the theoretical turbulence modeling and the experimental results interpreted using such models and the reality of large-scale natural events strongly related to anthropogenic climate changes, such as heatwaves and the cooling effect of aerosols. In fact we believe that more sophisticated practical results could be drawn from connecting theoretical turbulence studies to natural real phenomena, especially those under the influence of climate change. The mathematical modeling aimed at increasing predictability did not produce yet a fundamental breakthrough in the understanding of turbulence. In dealing with real turbulent flows we constantly rely on phenomenological approaches. To date, the large-scale spatio-temporal characteristics of turbulence has yet to be fully understood, due to the lack of sufficient in situ detection instruments in the atmosphere. As such, there is much room for improvement in turbulence-related parameterizations in global weather and climate prediction models. Short presentations of the heatwaves and cooling effect of aerosols are considered from the point of view that the study of weather data and the use of statistical modeling should be coupled with the fundamental studies on the fluid dynamics features of turbulence which play the primary role in the atmospheric circulation and thus in weather and climate changes.

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Section: The Cooling Effect Of the Aerosol Dropletsmentioning

confidence: 99%

Multiple Consequences Related to Atmospheric Turbulence Induced by the Climate Change in the Heatwaves Emergence and in the Cooling Effect of Aerosols

Roman

2024

IJEMA

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“…A different turbulence dissipation law has been observed in a variety of turbulent flows, including decaying and forced periodic turbulence [12,13,54], turbulence generated by fractal and regular grids [9], turbulent bluff body wakes [14], turbulent jets [48], atmospheric turbulence [34,35], and even wall turbulence [20,55]. This is a non-equilibrium dissipation scaling such that C ε ∼ √ Re G /Re λ , where Re G is some global Reynolds number characterizing the inlet/initial/boundary conditions and Re λ is a local Taylor length-based Reynolds number.…”

Section: Non-equilibrium Turbulence Dissipation Lawsmentioning

confidence: 99%

Beyond Scale-by-Scale Equilibrium

Vassilicos

2023

Atmosphere

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Homogeneous turbulence and turbulence in scale-by-scale equilibrium, played a leading role in the turbulence research of the second half of the twentieth century, and Jack Herring was an important contributor to these developments. The research activity which has followed these developments over the past ten to fifteen years concerns turbulence, which is out of scale-by-scale equilibrium either because it is non-stationary or because it is non-homogeneous or both. This paper is a short review of recent progress in this relatively new direction of turbulence research.

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Non-equilibrium dissipation scaling in atmospheric turbulence

Cited by 2 publications

References 14 publications

Multiple Consequences Related to Atmospheric Turbulence Induced by the Climate Change in the Heatwaves Emergence and in the Cooling Effect of Aerosols

Multiple Consequences Related to Atmospheric Turbulence Induced by the Climate Change in the Heatwaves Emergence and in the Cooling Effect of Aerosols

Beyond Scale-by-Scale Equilibrium

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