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Memorias de investigación
Artículos en revistas:
Low cost 3D global instability analysis and flow sensitivity based on dynamic mode decomposition and high-order numerical tools
Año:2014
Áreas de investigación
  • Física química y matemáticas,
  • Estabilidad hidrodinámica,
  • Dinamica de fluidos,
  • Ingenierías
Datos
Descripción
We explore the recently developed snapshot-based dynamic mode decomposition (DMD) technique, a matrix-free Arnoldi type method, to predict 3D linear global flow instabilities. We apply the DMD technique to flows confined in an L-shaped cavity and compare the resulting modes to their counterparts issued from classic, matrix forming, linear instability analysis (i.e. BiGlobal approach) and direct numerical simulations. Results show that the DMD technique, which uses snapshots generated by a 3D non-linear incompressible discontinuous Galerkin Navier?Stokes solver, provides very similar results to classical linear instability analysis techniques. In addition, we compare DMD results issued from non-linear and linearised Navier?Stokes solvers, showing that linearisation is not necessary (i.e. base flow not required) to obtain linear modes, as long as the analysis is restricted to the exponential growth regime, that is, flow regime governed by the linearised Navier?Stokes equations, and showing the potential of this type of analysis based on snapshots to general purpose CFD codes, without need of modifications. Finally, this work shows that the DMD technique can provide three-dimensional direct and adjoint modes through snapshots provided by the linearised and adjoint linearised Navier?Stokes equations advanced in time. Subsequently, these modes are used to provide structural sensitivity maps and sensitivity to base flow modification information for 3D flows and complex geometries, at an affordable computational cost. The information provided by the sensitivity study is used to modify the L-shaped geometry and control the most unstable 3D mode.
Internacional
Si
JCR del ISI
Si
Título de la revista
International Journal for Numerical Methods in Fluids
ISSN
1097-0363
Factor de impacto JCR
1,329
Información de impacto
ISI Journal Citation Reports © Ranking: 2013: 19/31 (Physics Fluids & Plasmas); 32/95 (Mathematics Interdisciplinary Applications); 58/102 (Computer Science Interdisciplinary Applications); 63/139 (Mechanics)
Volumen
76
DOI
10.1002/fld.3930
Número de revista
3
Desde la página
169
Hasta la página
184
Mes
SEPTIEMBRE
Ranking
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Participantes
  • Autor: Esteban Ferrer Vaccarezza (UPM)
  • Autor: Javier de Vicente Buendia (UPM)
  • Autor: Eusebio Valero Sanchez (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Departamento: Matemática Aplicada a la Ingeniería Aeroespacial
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