Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
On the Use of Matrix-Free Shift-Invert Strategies For Global Flow Instability Analysis
Year:2015
Research Areas
Information
Abstract
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.
International
Si
JCR
Si
Title
AEROSPACE SCIENCE AND TECHNOLOGY
ISBN
1270-9638
Impact factor JCR
1
Impact info
Volume
44
http://dx.doi.org/10.1016/j.ast.2014.11.003
Journal number
From page
69
To page
76
Month
SIN MES
Ranking
Participants
  • Autor: Francisco Gómez Carrasco (UPM)
  • Autor: Jose Miguel Perez Perez (UPM)
  • Autor: Hugh M. Blackburn (Universidad de Monas)
  • Autor: Vassilios Theofilis (UPM)
Research Group, Departaments and Institutes related
  • Creador: Departamento: Mecánica de Fluidos y Propulsión Aeroespacial
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)