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Analytical upstream collocation solution of a quadratic forced steady-state convection-diffusion equation /Smith, Eric Paul. January 2009 (has links)
Thesis (M.S.)--Boise State University, 2009. / Includes abstract. Includes bibliographical references (leaf 34).
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The application of boundary collocation method to fracture problems陳立華, Chan, Lap-wah, Samson. January 1994 (has links)
published_or_final_version / Mechanical Engineering / Master / Master of Philosophy
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The application of boundary collocation method to fracture problems /Chan, Lap-wah, Samson. January 1994 (has links)
Thesis (M. Phil.)--University of Hong Kong, 1994. / Includes bibliographical references (leaves 174-189).
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Analytical upstream collocation solution of a quadratic forced steady-state convection-diffusion equationSmith, Eric Paul. January 2009 (has links)
Thesis (M.S.)--Boise State University, 2009. / Title from t.p. of PDF file (viewed Apr. 30, 2010). Includes abstract. Includes bibliographical references (leaf 34).
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Collocation modelling of convective dispersionWang, James Chih. January 1984 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1984. / Typescript. Vita. Description based on print version record. Includes bibliographical references (leaves 224-232).
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Numerical approximation and identification problems for singular neutral equations /Cerezo, Graciela M., January 1994 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1994. / Vita. Abstract. Includes bibliographical references (leaves 41-42). Also available via the Internet.
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Dynamics of numerics of linearized collocation methods /Khumalo, Melusi, January 1997 (has links)
Thesis (Ph. D.), Memorial University of Newfoundland, 1998. / Restricted until June 1999. Bibliography: leaves 150-155.
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Stresses around neighbouring elliptical holes in flat plates.Alexandrakis, Alkibiades January 1976 (has links)
Thesis. 1976. M.S.--Massachusetts Institute of Technology. Dept. of Ocean Engineering. / Microfiche copy available in Archives and Engineering. / Includes bibliographical references. / M.S.
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Modeling large temperature swings in heat regenerators using orthogonal collocationKokron, Carlos J. 18 June 1991 (has links)
This thesis examines the transient performance of packed bed heat
regenerators when very large temperature differences are involved. The
effects of gas temperature on the key gas physical properties of velocity,
density and heat capacity were studied via simulation.
Three models were developed and compared. The first model
(HRKDV) considers heat balances for both solid and gas phases, the second
(HRVDV) considers mass balances in addition to the heat balances set up in
the first model and the third one (HRASO) considers that the only significant
rate of accumulation term is that of the energy of the solid phase.
The governing partial differential equations were solved by the method
of lines with the spatial discretization accomplished by the method of
orthogonal collocation.
The findings of this work reveal that whereas the effects of large
temperature changes on the gas velocity and density are completely negligible,
the effects of temperature on the gas heat capacity must be considered
"continuously" when large temperature swings occur. Considering the heat
capacity as a constant, even at an average value, leads to significant errors in
temperature profiles. / Graduation date: 1992
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Spectral collocation methods for the fractional PDEs in unbounded domainYuan, Huifang 26 July 2018 (has links)
This thesis is concerned with a particular numerical approach for solving the fractional partial differential equations (PDEs). In the last two decades, it has been observed that many practical systems are more accurately described by fractional differential equations (FDEs) rather than the traditional differential equation approaches. Consequently, it has become an important research area to study the theoretical and numerical aspects of various types of FDEs. This thesis will explore high order numerical methods for solving FDEs numerically. More precisely, spectral methods which exhibits exponential order of accuracy will be investigated. The method consists of expanding the solution with proper global basis functions and imposing collocation conditions on the Gauss quadrature points. In this work, Hermite and modified rational functions are employed to serve as basis functions for solutions that decay exponentially and algebraically, respectively. The main emphasis of this thesis is to propose the spectral collocation method for FDEs posed in unbounded domains. Components of the differentiation matrix involving fractional Laplacian are derived which can then be computed recursively using the properties of confluent hypergeometric function or hypergeometric function. The first part of the thesis introduces preliminaries useful for other parts of the thesis. Review of the relevant definitions and properties of special functions such as Hermite functions, Bessel functions, hypergeometric functions, Gegenbauer polynomials, mapped Jacobi polynomials, modified rational functions are presented. Fractional Sobolev space is introduced and some lemmas on interpolation approximation in the fractional Sobolev space are also included. In the second part of the thesis, we present the spectral collocation method based on Hermite functions. Two bases are used, namely, the over-scaled Hermite function and generalized Hermite function, which are orthogonal functions on the whole line with appropriate weight functions. We will show that the fractional Laplacian of these two kinds of Hermite functions can be represented by confluent hypergeometric function. Behaviors of the condition numbers for the resulting spectral differentiation matrices with respect to the number of expansion terms are investigated. Moreover, approximation in two-dimensional space using the tensorized bases, application to multi-term problems and use of scaling to match different decay rate are also considered. Convergence analysis for generalized Hermite function are derived and numerical errors for two bases are analyzed. The third part of the thesis deals with the spectral collocation method based on modified rational functions. We first give a brief introduction for computation of the fractional Laplacian using modified rational functions, which is represented by hypergeometric functions. Then the differentiation matrix involving the fractional Laplace operator is given. Convergence analysis for modified Chebyshev rational functions and modified Legendre rational functions are derived and numerical experiments are carried out.
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