☆ 4.7 Article

Spectral analysis on dissimilarity between turbulent momentum and heat transfers in plane Couette turbulence

PHYSICS OF FLUIDS (2022)

Related references

Note: Only part of the references are listed.

Article Mechanics

A driving mechanism of near-wall turbulence subject to adverse pressure gradient in a plane Couette flow

Yuxin Jiao et al.

Summary: The effect of adverse pressure gradient (APG) on near-wall turbulence and its production mechanism are investigated. The study shows that APG inhibits the generation of near-wall streaks and leads to more localized and isotropic turbulent fluctuations. Furthermore, a new mechanism of near-wall turbulence production under strong APG, involving wall-normal nonlinear transport and vortical structures, is uncovered.

JOURNAL OF FLUID MECHANICS (2022)

Add to Collection

Article Physics, Fluids & Plasmas

Large-scale and small-scale contribution to the skin friction reduction in a modified turbulent boundary layer by a large-eddy break-up device

C. Chan et al.

Summary: The role of streamwise length scales in turbulent skin friction generation is investigated. It is found that both the motions scaled with local boundary layer thickness and the large-scale ejection and sweep events contribute significantly to turbulent skin friction. The reduction of turbulent skin friction can be achieved by modifying both the large- and small-scale quadrant events.

PHYSICAL REVIEW FLUIDS (2022)

Add to Collection

Article Physics, Fluids & Plasmas

Decomposition of the Reynolds shear stress in a turbulent boundary layer modified by miniature vortex generators

C. I. Chan et al.

Summary: In this study, the spanwise modulation of Reynolds shear stress (RSS) distributions in a turbulent boundary layer modified by miniature vortex generators (MVGs) is investigated using a time-resolved velocity data set. The methodology involves quadrant analysis of RSS to identify the spatial and temporal information of the RSS events. Spanwise Fourier mode decomposition and triple velocity decomposition are then applied to obtain statistics of the decomposed RSS events, including conditional mean structures and mean skin friction contributions. The spanwise modification of the MVG on the RSS is characterized by fundamental and subharmonic modes that scale with the spanwise separation distance between MVG pairs.

PHYSICAL REVIEW FLUIDS (2022)

Add to Collection

Article Energy & Fuels

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

Takuya Kawata et al.

Summary: In recent years, there has been intensive research on scale-by-scale energy transport in wall turbulence and the complex spatial and interscale transfer of turbulent energy. This study investigates the spectral transport budgets of turbulent heat fluxes in a turbulent plane Couette flow. The similarity between the spectral transport of temperature-related statistics and Reynolds stresses is observed, especially in the inverse interscale transfer.

ENERGIES (2022)

Add to Collection

Article Mechanics

Ascending-descending and direct-inverse cascades of Reynolds stresses in turbulent Couette flow

Alessandro Chiarini et al.

Summary: This study investigates the interaction between small- and large-scale structures in a turbulent plane Couette flow using the anisotropic generalized Kolmogorov equations. Both bottom-up and top-down processes are considered, with a particular focus on the wall-normal direction. The findings reveal the involvement of large-scale motions in the production and redistribution of turbulent fluctuations, with complex interactions and cascades occurring within different scale ranges.

JOURNAL OF FLUID MECHANICS (2021)

Add to Collection

Article Mechanics

Minimal multi-scale dynamics of near-wall turbulence

Patrick Doohan et al.

Summary: This study investigates the temporal dynamics of near-wall turbulent flow with two integral length scales of motion using a shear stress-driven flow model, revealing scale interaction processes and non-equilibrium turbulent dissipation dynamics. A new scale interaction process is identified where wall-normal energy transfer from large to small scales drives small-scale turbulent production.

JOURNAL OF FLUID MECHANICS (2021)

Add to Collection

Article Mechanics

Scale interactions in turbulent plane Couette flows in minimal domains

Takuya Kawata et al.

Summary: Interscale energy transfers in wall turbulence involve forward transfers representing streak instabilities and reversed transfers representing regeneration of streamwise vortices, as observed in direct numerical simulations.

JOURNAL OF FLUID MECHANICS (2021)

Add to Collection

Article Mechanics

Direct numerical simulation of thermal channel flow for Reτ=5000 and Pr=0.71

Francisco Alcantara-Avila et al.

Summary: A direct numerical simulation of turbulent heat transfer in a channel flow was conducted at a Reynolds number of and a Prandtl number of air, . The study obtained mean values and intensities of temperature, calculated parameters such as the von Karman constant and the Nusselt number, and proposed correlations. It was observed that an asymptotic behavior of the von Karman constant was present as the Reynolds number increased.

JOURNAL OF FLUID MECHANICS (2021)

Add to Collection

Article Thermodynamics

Direct numerical simulation of thermal channel flow for medium-high Prandtl numbers up to Reτ=2000

F. Alcantara-Avila et al.

Summary: A new set of DNS experiments were conducted on a thermal channel flow, covering friction Reynolds and Prandtl numbers up to 2000 and 10, reaching a Prandtl number of 7 for water and introducing a new scale for the conductive sublayer thickness. The thermal field intensity does not increase with Reynolds number for highest Prandtl numbers, indicating good scaling near the wall. The Nusselt number shows a power function behavior with respect to Prandtl number in a certain range of the friction Peclet number, with turbulent Prandtl number increasing near the wall for highest Prandtl numbers due to reduction in thermal eddy diffusivity.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2021)

Add to Collection

Article Mechanics

Interscale transport mechanisms in turbulent boundary layers

C. Chan et al.

Summary: The flow physics of turbulent boundary layers was investigated using spectral analysis based on the spanwise scale decomposition of the Reynolds stress transport equation with data obtained from direct numerical simulation. The study revealed evidence of inverse turbulent kinetic energy transfer occurring in the near-wall region, as well as inverse transfer of Reynolds shear stress transport across the entire boundary layer. Interactions between large-scale structures and the free stream flow were also observed at the edge of the boundary layer.

JOURNAL OF FLUID MECHANICS (2021)

Add to Collection

Article Mechanics

A study of inner-outer interactions in turbulent channel flows by interactive POD

Hongping Wang et al.

Summary: The study investigates the amplitude and frequency modulation of near-wall flow structures by large-scale motions in turbulent channel flows. It finds that the amplitude modulation coefficient of the Reynolds shear stress is larger than that of the velocity components, and the frequency modulation effect has opposite influences in different directions.

THEORETICAL AND APPLIED MECHANICS LETTERS (2021)

Add to Collection

Article Thermodynamics

Heat transfer enhancement and torque reduction by traveling wave-like blowing and suction in turbulent Taylor-Couette flow

Hiroya Mamori et al.

Summary: Numerical simulations of turbulent Taylor-Couette flows show that a traveling wave control applied on the inner cylinder wall can affect torque and heat transfer. The study reveals that different parameters have varying effects on torque and heat transfer, and the traveling wave control influences both turbulence and advection contributions.

JOURNAL OF THERMAL SCIENCE AND TECHNOLOGY (2021)

Add to Collection

Article Mechanics

Energy transfer structures associated with large-scale motions in a turbulent boundary layer

Wenkang Wang et al.

Summary: The study investigates the role of large-scale motions (LSMs) in energy transfer using wall-parallel velocity fields at low-to-moderate Reynolds number. An anisotropic filter is designed to explore energy flux, revealing a strong connection between large-scale energy flux events and LSMs. The findings suggest that the meandering nature of LSMs could play a determining role in the process of large-scale energy transfer.

JOURNAL OF FLUID MECHANICS (2021)

Add to Collection

Article Mechanics

Dissimilarity between turbulent heat and momentum transfer induced by a streamwise travelling wave of wall blowing and suction

Arjun J. Kaithakkal et al.

JOURNAL OF FLUID MECHANICS (2020)

Add to Collection

Article Mechanics

Quantification of amplitude modulation in wall-bounded turbulence

Eda Dogan et al.

FLUID DYNAMICS RESEARCH (2019)

Add to Collection

Article Mechanics

Generation mechanism of a hierarchy of vortices in a turbulent boundary layer

Yutaro Motoori et al.

JOURNAL OF FLUID MECHANICS (2019)

Add to Collection

Article Thermodynamics

Evidences of persisting thermal structures in Couette flows

Francisco Alcantara-Avila et al.

INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW (2019)

Add to Collection

Article Mechanics

Scale interactions in turbulent rotating planar Couette flow: insight through the Reynolds stress transport

Takuya Kawata et al.

JOURNAL OF FLUID MECHANICS (2019)

Add to Collection

Article Physics, Fluids & Plasmas

Inverse energy cascade and vortical structure in the near-wall region of turbulent channel flow

Fujihiro Hamba

PHYSICAL REVIEW FLUIDS (2019)

Add to Collection

Article Mechanics

Spectral analysis of the budget equation in turbulent channel flows at high Reynolds number

Myoungkyu Lee et al.

JOURNAL OF FLUID MECHANICS (2019)

Add to Collection

Article Thermodynamics

DNS of thermal channel flow up to Re-tau=2000 for medium to low Prandtl numbers

F. Alcantara-Avila et al.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2018)

Add to Collection

Article Mechanics

Turbulent energy density in scale space for inhomogeneous turbulence

Fujihiro Hamba

JOURNAL OF FLUID MECHANICS (2018)

Add to Collection

Article Mechanics

Extreme-scale motions in turbulent plane Couette flows

Myoungkyu Lee et al.

JOURNAL OF FLUID MECHANICS (2018)

Add to Collection

Review Mechanics

Coherent structures in wall-bounded turbulence

Javier Jimenez

JOURNAL OF FLUID MECHANICS (2018)

Add to Collection

Article Physics, Multidisciplinary

Inverse Interscale Transport of the Reynolds Shear Stress in Plane Couette Turbulence

Takuya Kawata et al.

PHYSICAL REVIEW LETTERS (2018)

Add to Collection

Article Mechanics

Scale interactions and spectral energy transfer in turbulent channel flow

Minjeong Cho et al.

JOURNAL OF FLUID MECHANICS (2018)

Add to Collection

Article Thermodynamics

Heat transfer in fully developed turbulent channel flow with streamwise traveling wave-like wall deformation

Keisuke Uchino et al.

JOURNAL OF THERMAL SCIENCE AND TECHNOLOGY (2017)

Add to Collection

Article Mechanics

Cascades and wall-normal fluxes in turbulent channel flows

A. Cimarelli et al.

JOURNAL OF FLUID MECHANICS (2016)

Add to Collection

Article Mechanics

Spectra of energy transport in turbulent channel flows for moderate Reynolds numbers

Yoshinori Mizuno

JOURNAL OF FLUID MECHANICS (2016)

Add to Collection

Article Physics, Fluids & Plasmas

Dynamics of homogeneous shear turbulence: A key role of the nonlinear transverse cascade in the bypass concept

G. Mamatsashvili et al.

PHYSICAL REVIEW E (2016)

Add to Collection

Article Mechanics

Poiseuille and Couette flows in the transitional and fully turbulent regime

Paolo Orlandi et al.

JOURNAL OF FLUID MECHANICS (2015)

Add to Collection

Article Mechanics

Turbulent plane Couette flow at moderately high Reynolds number

V. Avsarkisov et al.

JOURNAL OF FLUID MECHANICS (2014)

Add to Collection

Article Mechanics

Paths of energy in turbulent channel flows

A. Cimarelli et al.

JOURNAL OF FLUID MECHANICS (2013)

Add to Collection

Article Mechanics

Optimal control of dissimilar heat and momentum transfer in a fully developed turbulent channel flow

A. Yamamoto et al.

JOURNAL OF FLUID MECHANICS (2013)

Add to Collection

Review Mechanics

High-Reynolds Number Wall Turbulence

Alexander J. Smits et al.

ANNUAL REVIEW OF FLUID MECHANICS, VOL 43 (2011)

Add to Collection

Article Mechanics

Dissimilar control of momentum and heat transfer in a fully developed turbulent channel flow

Y. Hasegawa et al.

JOURNAL OF FLUID MECHANICS (2011)

Add to Collection

Article Mechanics

Large-scale motions and inner/outer layer interactions in turbulent Couette-Poiseuille flows

Sergio Pirozzoli et al.

JOURNAL OF FLUID MECHANICS (2011)

Add to Collection

Article Mechanics

Inner/outer layer interactions in turbulent boundary layers: A refined measure for the large-scale amplitude modulation mechanism

Matteo Bernardini et al.

PHYSICS OF FLUIDS (2011)

Add to Collection

Article Thermodynamics

SIMULTANEOUS CONTROL OF FRICTION DRAG REDUCTION AND HEAT TRANSFER AUGMENTATION BY TRAVELING WAVE-LIKE BLOWING/SUCTION

Kosuke Higashi et al.

COMPUTATIONAL THERMAL SCIENCES (2011)

Add to Collection

Article Mechanics

Analogy between velocity and scalar fields in a turbulent channel flow

Robert Anthony Antonia et al.

JOURNAL OF FLUID MECHANICS (2009)

Add to Collection

Article Mechanics

Large-scale amplitude modulation of the small-scale structures in turbulent boundary layers

Romain Mathis et al.

JOURNAL OF FLUID MECHANICS (2009)

Add to Collection

Article Mechanics

Experimental study on large-scale streak structure in the core region of turbulent plane Couette flow

O. Kitoh et al.

PHYSICS OF FLUIDS (2008)

Add to Collection

Article Multidisciplinary Sciences

The interaction between inner and outer regions of turbulent wall-bounded flow

Jonathan F. Morrison

PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES (2007)

Add to Collection

Article Multidisciplinary Sciences

Large-scale influences in near-wall turbulence

Nicholas Hutchins et al.

PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES (2007)

Add to Collection

Article Mechanics

DNS of turbulent Couette flow with emphasis on the large-scale structure in the core region

T Tsukahara et al.

JOURNAL OF TURBULENCE (2006)

Add to Collection

Article Mechanics

Experimental study on mean velocity and turbulence characteristics of plane Couette flow: low-Reynolds-number effects and large longitudinal vortical structure

O Kitoh et al.

JOURNAL OF FLUID MECHANICS (2005)

Add to Collection

Letter Mechanics

Contribution of Reynolds stress distribution to the skin friction in wall-bounded flows

K Fukagata et al.

PHYSICS OF FLUIDS (2002)

Add to Collection

© Peeref 2019-2024. All rights reserved.