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Title:Lagrangian dynamics of turbulent Rayleigh-Benard convection
Author(s):Shen, Shikun
Advisor(s):Chamorro, Leonardo P.
Department / Program:Mechanical Sci & Engineering
Discipline:Mechanical Engineering
Degree Granting Institution:University of Illinois at Urbana-Champaign
Degree:M.S.
Genre:Thesis
Subject(s):Lagrangian
PTV
Rayleigh Benard convection
Abstract:This thesis focuses on laboratory experiments of turbulent Rayleigh Benard convection. Emphasis is placed on describing the Lagrangian dynamics of thermally-strati ed flows at Rayleigh numbers Ra = 2.8*10^9 and 1.1*10^10 for aspect ratios of 1.2, and 2. For this purpose, three-dimensional particle tracking velocimetry (3D-PTV) was used to characterize the three-dimensional Lagrangian paths of tracer particles in RB. The work also provides a general methodology for data pre-processing along with flow data post-processing. Lagrangian statistics including velocity and acceleration possibility density functions as well as pair dispersion are explored in detail. Inspection of the dynamics of buoyant particles, namely bubbles, are also discussed.
Issue Date:2019-04-25
Type:Text
URI:http://hdl.handle.net/2142/105098
Rights Information:Copyright 2019 Shikun Shen
Date Available in IDEALS:2019-08-23
Date Deposited:2019-05


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