Evidences of persisting thermal structures in Couette flows

Alcántara-Ávila, Francisco; Gandía-Barberá, Sergio; Hoyas, Sergio

doi:10.1016/j.ijheatfluidflow.2019.03.001

Cited by 14 publications

(9 citation statements)

References 35 publications

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“…Regarding other kinds of wall flows, a small number of studies have been done for Couette flows and boundary layers. The largest Reynolds numbers simulated have been published in Alcántara-Ávila, Barberá & Hoyas (2019) and Araya & Castillo (2012), respectively.…”

Section: Introductionmentioning

confidence: 99%

Direct numerical simulation of thermal channel flow for and

2021

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Section: Introductionmentioning

confidence: 99%

Direct numerical simulation of thermal channel flow for and

2021

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“…The co-dimension two boundary between these two regions is less welldefined, featuring a kind of sawtooth like behaviour. This can be related to the adaptation of the rolls to the geometry of the container, as it has been recently seen in thermal turbulent Couette flow [43].…”

Section: Resultsmentioning

confidence: 79%

Effect of the horizontal aspect ratio on thermocapillary convection stability in annular pool with surface heat dissipation

López-Núñez

Pérez-Quiles

Fajardo

et al. 2020

International Journal of Heat and Mass Transfer

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“…However, despite numerous studies reported on the wall turbulence with a passive scalar field (e.g., Refs. [15][16][17][18][19][20][21][22][23][24]) in the last few decades, the scale-by-scale transport of the passive scalar in wall turbulence has not been explored yet.…”

Section: Introductionmentioning

confidence: 99%

Spectral Analysis on Transport Budgets of Turbulent Heat Fluxes in Plane Couette Turbulence

Kawata

Tsukahara

2022

Energies

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In recent years, scale-by-scale energy transport in wall turbulence has been intensively studied, and the complex spatial and interscale transfer of turbulent energy has been investigated. As the enhancement of heat transfer is one of the most important aspects of turbulence from an engineering perspective, it is also important to study how turbulent heat fluxes are transported in space and in scale by nonlinear multi-scale interactions in wall turbulence as well as turbulent energy. In the present study, the spectral transport budgets of turbulent heat fluxes are investigated based on direct numerical simulation data of a turbulent plane Couette flow with a passive scalar heat transfer. The transport budgets of spanwise spectra of temperature fluctuation and velocity-temperature correlations are investigated in detail in comparison to those of the corresponding Reynolds stress spectra. The similarity and difference between those scale-by-scale transports are discussed, with a particular focus on the roles of interscale transport and spatial turbulent diffusion. As a result, it is found that the spectral transport of the temperature-related statistics is quite similar to those of the Reynolds stresses, and in particular, the inverse interscale transfer is commonly observed throughout the channel in both transport of the Reynolds shear stress and wall-normal turbulent heat flux.

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Evidences of persisting thermal structures in Couette flows

Cited by 14 publications

References 35 publications

Direct numerical simulation of thermal channel flow for and

Direct numerical simulation of thermal channel flow for and

Effect of the horizontal aspect ratio on thermocapillary convection stability in annular pool with surface heat dissipation

Spectral Analysis on Transport Budgets of Turbulent Heat Fluxes in Plane Couette Turbulence

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