A Study of Turbulent Penetrative Thermal Convection Using Stereoscopic Particle Image Velocimetry PDF Download
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Author: Vladamir Troy
Publisher:
ISBN:
Category :
Languages : en
Pages : 262
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Author: Vladamir Troy
Publisher:
ISBN:
Category :
Languages : en
Pages : 262
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Author:
Publisher:
ISBN:
Category : Mechanics
Languages : en
Pages : 308
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Author: Sergei Sergeevǐc Zilitinkevǐc
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 216
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Turbulence is important to hydraulic and environmental engineers and essential to the emerging understanding of natural processes of fluid mixing in pollution and meteorology. This text reviews the understanding, East and West, of turbulent penetrative convection.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 150
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The present study reports an experimental investigation of the scaling of large-scale coherent structures, their dynamics and heat transport in turbulent mixed convection. Based on a concept of spatial scaling, mixed convective air flow was examined by particle image velocimetry and temperature measurements in two rectangular containers with the same geometry and similar characteristic numbers. The dimensions of the container are scaled by a factor five. Due to the unsteady nature of mixed convection in the present configuration and parameter range, the instantaneous velocity vector fields ...
Author: Guy Amir
Publisher:
ISBN:
Category :
Languages : en
Pages : 30
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"In this study we investigate the phenomenon of turbulent thermal diffusion of inertial and non-inertial particles in stably stratified turbulent flow. The phenomenon of turbulent thermal diffusion was predicted theoretically 20 years ago and since then was detected in laboratory and numerical experiments and confirmed by atmospheric observations. The essence of this phenomenon of turbulent thermal diffusion is the appearance of a nondiffusive mean flux of particles in the direction of the mean heat flux that results in a accumulation of particles in the vicinity of temperature minima. The theory of this effect has been previously developed only for small temperature gradients and small Stokes numbers [Elperin et al. (1996a)]. In the course of the research we conducted comprehensive measurements of spatial distributions of particles in oscillating grid turbulence and turbulent velocity distributions using Particle Image Velocimetry for various flow conditions. The temperature distribution was measured using a temperature probe that includes an array of twelve E-thermocouples." -- From the abstract.
Author: Syed Junaid Kamran Bukhari
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ISBN:
Category :
Languages : en
Pages : 0
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Present dissertation describes the turbulent convection in horizontal layers of air and water separated by an evaporative shear-free water surface during natural convection. A detailed analysis of the hydrodynamic turbulent structure on water and air sides is presented in this study. The major portion of the research comprised of experimental investigation in addition to simulation of simultaneous airside and waterside velocity fields. The experimental measurements were made using non-intrusive state-of-the-art techniques, namely particle image velocimetry (PIV) and laser induced fluorescence (LIF) for instantaneous measurements of velocity and temperature fields, respectively. The numerical study shows organized bulk vortical motions on air and water sides. The results also show that for unstable thermal stratification the magnitude of the airside velocities is an order of magnitude higher than the waterside velocities. The experimental results show that the water and air flow fields undergo three-dimensional flow interactions which form complex flow patterns. A detailed spectral analysis has been performed to investigate the temporal and spatial scales of turbulent motions induced during natural convection. The wavenumber and frequency spectra showed the existence of two distinct power law regimes. In low wavenumber (100 rad/m
Author: Prasad V. Gonuguntla
Publisher:
ISBN:
Category :
Languages : en
Pages : 162
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Author: Wai Chi Cheng
Publisher:
ISBN:
Category : Heat
Languages : en
Pages : 160
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Author: Pengfei Qi
Publisher:
ISBN:
Category : Heat
Languages : en
Pages : 69
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Author: Sergeĭ Sergeevich Zilitinkevich
Publisher:
ISBN: 9781856288163
Category : Ocean circulation
Languages : en
Pages : 179
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