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Large-eddy simulation of physiological pulsatile flow through a constricted channelHossain, Afzal 20 September 2012 (has links)
In this thesis, large-eddy simulation (LES) is used to simulate both Newtonian and non-Newtonian physiological pulsatile flows in constricted channels to gain insights into the physical phenomenon of laminar-turbulent flow transition due to the presence of an artificial arterial stenosis. The advanced dynamic nonlinear subgrid-scale stress (SGS) model of Wang and Bergstrom (DNM) was utilized to conduct numerical simulations and its predictive performance was examined in comparison with that of the conventional dynamic model (DM) of Lilly.
An in-house LES code has been modified to conduct the unsteady numerical simulations, and the results obtained have been validated against available experimental and direct numerical simulation (DNS) results. The physical characteristics of the flow field have been thoroughly studied in terms of the resolved mean velocity, turbulence kinetic energy, viscous wall shear stress, and turbulence energy spectra along the central streamline of the domain.
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Spectrally correct finite element analysis of electromagnetic fieldsPinchuk, Amy Ruth January 1988 (has links)
Direct solution for three dimensional electric or magnetic field vectors throughout the frequency spectrum is accomplished by a finite element formulation which includes displacement and conduction currents, and requires no special treatment for material interfaces. Analysis of bus bar and Bath cube eddy current problems demonstrate the capabilities of the method. / Spurious components in solutions to vector field problems are shown to corrupt deterministic solutions. These corruptions are identifiable with spurious modes familiar to high frequency modal analysis. Spectrally correct mixed order finite elements are demonstrated to retrieve accuracy in deterministic analyses. / The formulation may be limited by computer round-off at matrix assembly which affects the solenoidality of vector fields. Furthermore, extreme values encountered in low frequency eddy current analysis lead to ill conditioning and unreliable solutions. These numerical instabilities are overcome by parametric adjustment of permittivities. Error estimates are established to monitor inaccuracies introduced by permittivity adjustment.
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Advanced modelling for on-line monitoring of structural integrity /Isterling, William Martin. Unknown Date (has links)
Thesis (M.Eng.)--University of South Australia, 1998.
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Eddy current characterization of torque stressed steel and the development of a shaft torque eddy current test systemVaronis, Orestes J. January 2008 (has links)
Dissertation (Ph. D.)--University of Akron, Dept. of Electrical and Computer Engineering, 2008. / "December, 2008." Title from electronic dissertation title page (viewed 12/29/2008) Advisor, Nathan Ida; Committee members, Robert J. Veillette, George C. Giakos, Jiang John Zhe, Gerald W. Young; Department Chair, Jose Alexis De Abreu-Garcia; Dean of the College, George K. Haritos; Dean of the Graduate School, George R. Newkome. Includes bibliographical references.
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Christian science als sociaal verschijnsel ...Does, Leendert Pieter van der. January 1900 (has links)
Proefschrift--Amsterdam. / "Literatuuroverzicht": p. 303-315.
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On fluxes and gradients in the surface layer under convective conditions /Steeneveld, Gert-Jan. January 1900 (has links) (PDF)
Thesis (M. Sc.)--Wageningen University, 2001. / "July 2001." Includes bibliographical references (p. 47-49). Also available via the World Wide Web. http://www.geocities.com/gjsteeneveld
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A multi-coil magnetostrictive actuatorWilson, Thomas Lawler. January 2009 (has links)
Thesis (M. S.)--Mechanical Engineering, Georgia Institute of Technology, 2009. / Committee Chair: Zinn, Ben T.; Committee Member: Book, Wayne; Committee Member: Glezer, Ari; Committee Member: Neumeier, Yedidia; Committee Member: Seitzman, Jerry.
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Wind and turbulence structure in the boundary layer over the Antarctic PlateauDabberdt, Walter F. January 1969 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1969. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
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Large Eddy Simulation of premixed and partially premixed combustionPorumbel, Ionuţ. January 2006 (has links)
Thesis (Ph. D.)--Aerospace Engineering, Georgia Institute of Technology, 2007. / Yeung, Pui-Kuen, Committee Member ; Lieuwen, Tim, Committee Member ; Menon, Suresh, Committee Chair ; Seitzman, Jerry, Committee Member ; Syed, Saadat, Committee Member.
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Christian science als sociaal verschijnsel ...Does, Leendert Pieter van der. January 1900 (has links)
Proefschrift--Amsterdam. / "Literatuuroverzicht": p. 303-315.
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