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Title:Point source dispersion in a direct numerical simulation of turbulent channel flow
Author(s):Kontomaris, Konstantinos
Doctoral Committee Chair(s):Hanratty, Thomas J.
Department / Program:Chemical and Biomolecular engineering
Discipline:Chemical Engineering
Degree Granting Institution:University of Illinois at Urbana-Champaign
Degree:Ph.D.
Genre:Dissertation
Subject(s):Chemical Engineering
Abstract:The dispersion of a scalar quantity from point sources located in a Direct Numerical Simulation of turbulent channel flow is studied. An algorithm for tracking fluid particles or molecular (or thermal) markers is developed and tested. Accurate estimates of a number of Lagrangian characteristics of the flow, necessary for the description of the diffusion process, are reported for the case of a point source in the center of the channel. The consequences of molecular diffusivity on the effectiveness of the turbulence to disperse a foreign substance (or heat) are also explored. A new method is proposed for calculating the effect of Peclet number on the Lagrangian property autocorrelation in isotropic turbulence. Computed property autocorrelations, from a simulated experiment of point source diffusion in the center of the channel, are also reported. Finally, results for the diffusion from point sources located at the channel walls are presented and discussed.
Issue Date:1991
Type:Text
Language:English
URI:http://hdl.handle.net/2142/19018
Rights Information:Copyright 1991 Kontomaris, Konstantinos
Date Available in IDEALS:2011-05-07
Identifier in Online Catalog:AAI9210875
OCLC Identifier:(UMI)AAI9210875


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