Resolving vorticity and dissipation in a turbulent boundary layer by tomographic PTV and VIC+

Schneiders, J.F.G.; Scarano, Fulvio; Elsinga, Gerrit E.

doi:10.1007/s00348-017-2318-x

Cited by 36 publications

(24 citation statements)

References 38 publications

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“…There have been studies focused on accuracy of volumetric velocimetry in specific cases, e.g. turbulent boundary layer measurements by Tomographic PIV (Atkinson et al 2011) and Tomographic PTV (Schneiders et al 2017), and comparisons between MRI and 2D PIV for specific configurations (Elkins et al 2009, Coletti et al 2013a, Töger et al 2016. However, the systematic assessment of uncertainty of volumetric techniques is still in its infancy and will likely be a topic of high significance as the tools gain widespread use.…”

mentioning

confidence: 99%

Volumetric velocimetry for fluid flows

Discetti

Coletti

2018

Meas. Sci. Technol.

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In the last two decades, several techniques have been introduced that are capable to extract three-dimensional three-components velocity fields in fluid flows. Fast-paced developments in both hardware and processing algorithms have generated a diverse collection of methods, with a growing range of application in flow diagnostics. The context has been further enriched by an increasingly marked trend of hybridization, in which the boundaries between different techniques are fading. In this review, we carry out a survey of the prominent methods, including optical techniques and approaches based on medical imaging. Each one is outlined through a sample application from the recent literature, focusing on respective strengths and challenges. A framework for the evaluation of the velocimetry performance in terms of dynamic spatial range is discussed, along with technological trends and emerging strategies to exploit 3D data. While critical challenges still exist, these observations highlight how volumetric techniques are transforming experimental fluid mechanics, and that the possibilities they offer have just begun to be explored.

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mentioning

confidence: 99%

Volumetric velocimetry for fluid flows

Discetti

Coletti

2018

Meas. Sci. Technol.

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“…Если при переходе к безразмерным переменным в качестве масштаба длины взять динамическую длину, а в качестве масштаба скорости динамическую скорость, то такие переменные называют внутренними или переменными стенками и обозначают при помощи надстрочного индекса " плюс". Масштабом энергии тогда будет являться величина ρu 2 τ . Безразмерную кинетическую энергию турбулентных пульсаций в переменных стенки обозначим через k + .…”

Section: зависимость кинетической энергии турбулентных пульсаций от рunclassified

“…Так, в работе [1] изучалось влияние числа Рейнольдса на среднее по сечению трубы значение кинетической энергии продольных пульсаций скорости жидкости. Продолжают развиваться и оптические методы измерений [2].…”

Section: Introductionunclassified

Влияние Числа Рейнольдса На Распределение Кинетической Энергии Турбулентных Пульсаций По Сечению Плоского Канала

Чесноков¹

2019

Журнал Технической Физики

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“…Alekseenko et al [22] also considered the Turbulent Kinetic Energy in an impinging jet and the authors calculated the dissipation term from instantaneous Stereo-PIV velocity fields in order to compare swirling and non-swirling impinging jets. A few studies, such as those by [23][24][25], considered the Turbulent Kinetic Energy in Tomographic-PIV velocity fields. In this work, we studied the Turbulent Kinetic Energy (denoted by ABSTRACT -Impinging jets are widely used in ventilation systems to improve the mixing and diffusion of airflows.…”

Section: Introductionmentioning

confidence: 99%

Turbulent kinetic energy and self-sustaining tones: Experimental study of a rectangular impinging jet using high Speed 3D tomographic Particle Image Velocimetry

Assoum¹,

Hamdi²,

Hassan³

et al. 2020

JMES

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Impinging jets are widely used in ventilation systems to improve the mixing and diffusion of airflows. When a rectangular jet hits a slotted plate, an acoustic disturbance can be generated and self-sustained tones produced. Few studies have looked at the Turbulent Kinetic Energy (TKE) produced by the aerodynamic field in such configurations and in the presence of self-sustaining tones. The aim of this work is to investigate the energy transfer between the aerodynamic and acoustic fields generated in a rectangular jet impinging on a slotted plate. The present paper methodology is based on experimental data measurements using 3D tomographic Particle Image Velocimetry (PIV) technique and microphones. It was found that the spectrum of the TKE for Re=5294 (configuration of self-sustained tones) is which is smaller than that of the acoustic signal . A negative peak of correlation is obtained between the acoustic signal and TKE for These results may lead to conclude that the acoustic cycle should be covered by the TKE period and the two signals of both fields are in opposition of phase in order to obtain an optimal configuration for energy transfer.

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Resolving vorticity and dissipation in a turbulent boundary layer by tomographic PTV and VIC+

Cited by 36 publications

References 38 publications

Volumetric velocimetry for fluid flows

Volumetric velocimetry for fluid flows

Влияние Числа Рейнольдса На Распределение Кинетической Энергии Турбулентных Пульсаций По Сечению Плоского Канала

Turbulent kinetic energy and self-sustaining tones: Experimental study of a rectangular impinging jet using high Speed 3D tomographic Particle Image Velocimetry

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