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Memorias de investigación
Communications at congresses:
Reduced order models of industrial fluid-thermal problems
Year:2009
Research Areas
  • Mathematics,
  • Naval engineering
Information
Abstract
A method is presented to generate reduced order models (ROMs) in Fluid Dynamics problems. The method is based on the expansion of the flow variables on a Proper Orthogonal Decomposition (POD) basis, obtained from a limited number of snapshots calculated via Computational Fluid Dynamics (CFD). Then, the POD-mode amplitudes are calculated as minimizers of a properly defined overall residual of the equations and boundary conditions. The residual can be defined using only a limited number of points in the flow field, which can be scattered either all over the whole computational domain or over a smaller projection window. The process is both computationally efficient (reconstructed flow fields require less than 1 % of the time needed to compute a full CFD solution) and flexible (the projection window can avoid regions of large localized CFD errors). Also, the number and distribution of snapshots and the effect of CFD errors are briefly discussed, to conclude that the method is numerically robust, since the results are largely insensitive to the definition of the residual, to CFD errors, and to the CFD method itself, which may contain artificial stabilizing terms. Thus, the method is amenable for practical engineering applications.
International
Si
Congress
International Conference on Computational and Mathematical Methods, 2009
960
Place
Gijón (Asturias), Spain
Reviewers
Si
ISBN/ISSN
978-84-612-9727-6
Start Date
30/06/2009
End Date
03/07/2009
From page
98
To page
108
Proceedings of the 2009 International Conference on Computational and Mathematical Methods in Science and Engineering
Participants
  • Autor: Diego Alonso Fernández (UPM)
  • Autor: Luis Santiago Lorente Manzanares (UPM)
  • Autor: Angel Gerardo Velazquez Lopez (UPM)
  • Autor: Jose Manuel Vega De Prada (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Dinámica y estabilidad no lineal en ingeniería aeroespacial
  • Grupo de Investigación: Ingeniería de Sistemas y Microsistemas Termofluidodinámicos aplicados al Sector Aeroespacial
  • Departamento: Motopropulsión y Termofluidodinámica
  • Departamento: Fundamentos Matemáticos de la Tecnología Aeronáutica
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