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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
111

Computation of unsteady viscous incompressible flow around an obliquely oscillating circular cylinder using a parallelized finite difference algorithm /

Lawrence, Karl P., January 2004 (has links)
Thesis (M.Sc.)--Memorial University of Newfoundland, 2004. / Bibliography: leaves 139-144.
112

Incompressible fluids with vorticity in Besov spaces

Cozzi, Elaine Marie, January 1900 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2007. / Vita. Includes bibliographical references.
113

Performance of algebraic multigrid for parallelized finite element DNS/LES solvers /

Larson, Gregory J. January 2006 (has links) (PDF)
Thesis (M.S.)--Brigham Young University. Dept. of Mechanical Engineering, 2006. / Includes bibliographical references (p. 81-84).
114

Least squares finite element methods for the Stokes and Navier-Stokes equations /

Bochev, Pavel B. January 1994 (has links)
Thesis (Ph. D.)--Virginia Polytechnic Institute and State University, 1994. / Vita. Abstract. Includes bibliographical references (leaves 155-158). Also available via the Internet.
115

Aplicação do método da expansão em funções hierárquicas na solução das equações de navier-Stokes em duas dimensões para fluidos compressíveis em alta velocidade

CONTI, THADEU das N. 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:53:37Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:08:27Z (GMT). No. of bitstreams: 1 12226.pdf: 2981863 bytes, checksum: f04d559e0b2d5d5ba05718e2738e9989 (MD5) / Tese (Doutoramento) / IPEN/T / Escola Politécnica, Universidade de Sao Paulo - POLI/USP
116

Aplicação do método da expansão em funções hierárquicas na solução das equações de navier-Stokes em duas dimensões para fluidos compressíveis em alta velocidade

CONTI, THADEU das N. 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:53:37Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:08:27Z (GMT). No. of bitstreams: 1 12226.pdf: 2981863 bytes, checksum: f04d559e0b2d5d5ba05718e2738e9989 (MD5) / Tese (Doutoramento) / IPEN/T / Escola Politécnica, Universidade de Sao Paulo - POLI/USP
117

Estudo de equações do tipo Navier-Stokes com retardo / Nvier-Stokes equations with delay

Sandro Marcos Guzzo 05 June 2009 (has links)
Neste trabalho estudamos a existência de soluções de equações do tipo Navier-Stokes com retardo na força externa e no termo n~ao linear. Usando a teoria de semigrupos estudamos a existência de soluções para um problema da forma \'d. SUP. dt u(t) - v\'delta\'u(t) + (F(t, \'u IND.t\'). abla)u(t) + abla p = g(t, \'u IND.t\'), em \'OMEGA\' x (0, T), div u(t) = 0 em \'OMEGA\' x (0, T), u(0, x) = \'u POT.0 (x) x PERTENCE a \' OMEGA\', u(t, x) = 0 t > 0, X \'PERTENCE A\' \' PARTIAL\' \'OMEGA\', u(t, x) =\\phi (t, x) t \'PERTENCE A\' (- \'INFINITO\', 0) x \'PERTENCE A\' \'OMEGA\', onde F9t, \'uIND.t) = INT.IND.t SUP. -\' INFINITO\' \' ALFA1(s-t)u(s)ds + u(t-r), g(t, \'u IND.t\') = INT. SUP. t IND. - INFINITO \'BETA\' (s-t)u(s)ds. Similarmente, usando a tecnica de aproximac~oes de Galerkin, estudamos o problema anterior com F(.) e g(.) dadas por f(t; \'u INDS.t\') = u(t-r(t)); e g(t; \'u IND.t\') = G(u(t-\'rô\' (t))), para alguma função G apropriada. Neste caso, também estudamos a estabilidade de soluções estacionarias / In this work we stuy the existence of solutions for a Navier-Stokes typt equations with delay in the external force and in the nonlinear term. Using the semi-group theory we study the existence of solution for a problem in the form \'d. SUP. dt u(t) - v\'delta\'u(t) + (F(t, \'u IND.t\'). abla)u(t) + abla p = g(t, \'u IND.t\'), ijn \'OMEGA\' x (0, T), div u(t) = 0 in \'OMEGA\' x (0, T), u(0, x) = \'u POT.0 (x) x \'IT BELONGS \' OMEGA\', u(t, x) = 0 t > 0, X \'IT BELONGS\' \'PARTIAL\' \'OMEGA\', u(t, x) =\\phi (t, x) t \'IT BELONGS\' (- \'INFINITY\', 0) x \'IT BELONGS\' \'OMEGA\', where F(t, \'u .t) = INT.IND.t SUP. -\' INFINITY\' \' ALFA(s-t)u(s)ds + u(t-r), g(t, \'u IND.t\') = INT. SUP. t IND. - INFINITY \'BETA\' (s-t)u(s)ds. On another hand using the Galerkin appreoximations method we study the same with F(.) e g(.) given by f(t; \'u INDS.t\') = u(t-r(t)); and g(t; \'u IND.t\') = G(u(t-\'rô\' (t))), for some G appropriated. In thiis case, we study also the stability of stanionary solutions
118

As equações de Navier-Stokes em espaços de Morrey / On the Navier-Stokes equations in Morrey spaces

Alves, Bruno Ferreira, 1988- 19 August 2018 (has links)
Orientador: Lucas Catão de Freitas Ferreira / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Matemática, Estatística e Computação Científica / Made available in DSpace on 2018-08-19T15:06:30Z (GMT). No. of bitstreams: 1 Alves_BrunoFerreira_M.pdf: 943114 bytes, checksum: 70e3cdb3ee60ae3ed29a79cfeded3f59 (MD5) Previous issue date: 2012 / Resumo: Estudamos as equações de Navier-Stokes (NS) em...Observação: O resumo, na íntegra, poderá ser visualizado no texto completo da tese digital / Abstract: We study the Navier-Stokes equations (NS) in...Note: The complete abstract is available with the full electronic document / Mestrado / Matematica / Mestre em Matemática
119

Some problems in low Reynolds' number flow

Evans, G. A. January 1969 (has links)
No description available.
120

Flow of second-grade fluids in regions with permeable boundaries

Maritz, Riette 22 February 2006 (has links)
The equation of motion for the flows of incompressible Newtonian fluids (Navier Stokes equations) under no-slip boundary conditions have been studied deeply from many perspectives. The questions of existence and uniqueness of both classical and weak solutions have received more than a fair share of attention. In this study the same problem for non-Newtonian fluids of second grade has been studied from the point of view of weak solutions and classical solutions for non-homogeneous boundary data, i.e., dynamical boundary conditions in regions with permeable boundaries. We consider the situation where a container is immersed in a larger fluid body and the boundary admits fluid particles moving across it in the direction of the normal. In this study we give alternative approaches through formulations of' dynamics at the boundary', the idea being that the normal component of velocity at the boundary is viewed as an unknown function which satisfies a differential equation intricately coupled to the flow in the region 'enclosed' by the boundary. We describe two mathematical models denoted by Problem PI and Problem P2. These models lead to dynamics at a permeable boundary, and a kinematical boundary condition for normal flow through the boundary. These conditions take into account the curvature of the boundary which enforces certain stresses. We then show with the help of the energy method that for fluids of second grade, the dynamics at the boundary and the boundary condition lead to conditional stability of the rest state for Problem P1 and Problem P2. We also prove uniqueness of classical solutions for the two models. The existence of a weak solution for this system of evolution equations is proved only for Problem P2 with the help of the Faedo-Galerkin method with a special basis. In this case the special basis is formed by eigenfunctions. The existence proof of at least one classical solution, local in time is established by means of a version of the Fixed-point Theorem of Bohnenblust and Karlin, and the Ascoli-Arzela Theorem. / Thesis (PhD (Applied Mathematics))--University of Pretoria, 2007. / Mathematics and Applied Mathematics / unrestricted

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