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dc.contributor.advisor Sorensen, Danny C.
dc.creatorCastillo, Zenaida
dc.date.accessioned 2009-06-04T06:30:39Z
dc.date.available 2009-06-04T06:30:39Z
dc.date.issued 2005
dc.identifier.urihttps://hdl.handle.net/1911/18743
dc.description.abstract This thesis presents a new algorithm to find and follow particular solutions of parameterized nonlinear systems. Important applications often arise after spatial discretization of time dependent PDEs. We embed a block eigenvalue solver in a continuation framework for the computation of some specific eigenvalues of large Jacobian matrices that depend on one or more parameters. The new approach is then employed to study the behavior of an industrial process referred to as coating. Stability analysis of the discretized system that models this process is important because it provides alternatives for changing parameters in order to improve the quality of the final product or to increase productivity. Experiments on several problems show the reliability of the new approach in the accurate detection of critical points. Further analysis of two-dimensional coating flow problems reveals that computational results are competitive with those of previous continuation approaches. As a byproduct, one obtains information about the stability of the process with no additional cost. Due to the size and structure of the matrices generated in three-dimensional free surface flow applications, it is necessary to use a general iterative linear solver, such as GMRES. However, GMRES displays a very slow rate of convergence as a consequence of the poor conditioning in the coefficient matrices. To speed up GMRES convergence, we developed and implemented a scalable approximate sparse inverse preconditioner. Numerical experiments demonstrate that this preconditioner greatly improves the convergence of the method. Results illustrate the effectiveness of the preconditioner on very large free surface flow problems with more than million unknowns.
dc.format.extent 162 p.
dc.format.mimetype application/pdf
dc.language.iso eng
dc.subjectMathematics
dc.title A new algorithm for continuation and bifurcation analysis of large scale free surface flows
dc.type.genre Thesis
dc.type.material Text
thesis.degree.department Mathematics
thesis.degree.discipline Natural Sciences
thesis.degree.grantor Rice University
thesis.degree.level Doctoral
thesis.degree.name Doctor of Philosophy
dc.identifier.citation Castillo, Zenaida. "A new algorithm for continuation and bifurcation analysis of large scale free surface flows." (2005) Diss., Rice University. https://hdl.handle.net/1911/18743.


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