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Memorias de investigación
Artículos en revistas:
On the Use of Matrix-Free Shift-Invert Strategies For Global Flow Instability Analysis
Año:2015
Áreas de investigación
Datos
Descripción
A novel time-stepping shift-invert algorithm for linear stability analysis of laminar flows in complex geometries is presented. This method, based on a Krylov subspace iteration, enables the solution of complex non-symmetric eigenvalue problems in a matrix-free framework. Validations and comparisons to the classical exponential method have been performed in three different cases: (i) stenotic flow, (ii) backward-facing step and (iii) lid-driven swirling flow. Results show that this new approach speeds up the required Krylov subspace iterations and has the capability of converging to specific parts of the global spectrum. It is shown that, although the exponential method remains the method of choice if leading eigenvalues are sought, the performance of the present method could be dramatically improved with the use of a preconditioner. In addition, as opposed to other methods, this strategy can be directly applied to any time-stepper, regardless of the temporal or spatial discretization of the latter.
Internacional
Si
JCR del ISI
Si
Título de la revista
AEROSPACE SCIENCE AND TECHNOLOGY
ISSN
1270-9638
Factor de impacto JCR
1
Información de impacto
Volumen
44
DOI
http://dx.doi.org/10.1016/j.ast.2014.11.003
Número de revista
Desde la página
69
Hasta la página
76
Mes
SIN MES
Ranking
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Participantes
  • Autor: Francisco Gómez Carrasco (UPM)
  • Autor: Jose Miguel Perez Perez (UPM)
  • Autor: Hugh M. Blackburn (Universidad de Monas)
  • Autor: Vassilios Theofilis (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Departamento: Mecánica de Fluidos y Propulsión Aeroespacial
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