Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/13826
Title: Simulation of micro flows by Lattice Boltzmann method
Authors: LIM CHEE YEN
Keywords: Lattice Boltzmann Method, pressure-driven, shear-driven, microcavity flow, rarefaction effect, and compressibility effects
Issue Date: 17-Mar-2004
Source: LIM CHEE YEN (2004-03-17). Simulation of micro flows by Lattice Boltzmann method. ScholarBank@NUS Repository.
Abstract: A computational investigation on micro-scaled gas flows by lattice Boltzmann method is presented. This research, merely in isothermal conditions and two-dimensional in space, consists of three parts: pressure-driven (Poiseuille) flow, shear-driven (Couette) flow and driven cavity flow. In pressure-driven microchannel flow, the non-linearity of pressure and the slip phenomenon were studied; these include the studies of Effects of rarefaction (Knudsen number) and pressure ratio. In shear-driven flow, the slip velocity and its relationship with the relaxation time t were investigated for wide range of Kn; our numerical results generally verified the first order slip formulation and compared well with the analytical shear stress. The last portion studies the microcavity flow, which reports a primary vortex formed at the core of the microcavity. The stream function intensity and the location of vortex centre were studied. Other parameters included in the study are velocity profiles, aspect ratio and the lattice grid size effect.
URI: http://scholarbank.nus.edu.sg/handle/10635/13826
Appears in Collections:Master's Theses (Open)

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acknowledgement.pdf53.17 kBAdobe PDF

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Summary.pdf65.36 kBAdobe PDF

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Table_of_Contents.pdf75.02 kBAdobe PDF

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Nomenclature.pdf86.54 kBAdobe PDF

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References.pdf90.62 kBAdobe PDF

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List_of_Figures_and_Tables.pdf144.78 kBAdobe PDF

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Appendices_A1_A2_A3.pdf221.14 kBAdobe PDF

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