Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Towards a High-Fidelity, Computational Efficient Simulation of Aeroelastic Flows
Year:2015
Research Areas
  • Mathematics,
  • Physics & space science,
  • Mechanical aeronautics and naval engineering
Information
Abstract
Vertical vibrations of a perfectly flat horizontal free surface produce Faraday waves by a well-known subharmonic instability mechanism, triggered by an oscillating, spatially uniform vertical pressure gradient. In more general vibrating tanks and wavemakers, subharmonic forcing is non-uniform and the analysis more subtle. Nevertheless, a simplified two-dimensional amplitude equation has been recently derived by us (JFM 739(2014), 196) that provided the subharmonic instability threshold in horizontally vibrating containers, which match very well quantitatively with former experiments by Porter et al (Fluid Dyn. Res. 44(2012), 065501). Moreover, the equation also predicted the primary patterns, which were experimentally confirmed by Tinao et.al (Phys. Fluids 24 (2014), 022110). This equation can also be used in different configurations, such as in mixed horizontal/vertical vibrations and in cross-waves produced by immersed wavemakers, which were analyzed by Moisy et al (Phys. Fluids 24, (2012) 022110). An overview of cross-waves will be made using the above-mentioned amplitude equation, addressing issues such as obliqueness of the primary patterns, quasi-periodicity, and surface contamination, which is expected in experimental realizations using tap water.
International
Si
Congress
Sixth International Symposium on Bifurcations and Instabilities in Fluid Dynamics
960
Place
Paris
Reviewers
Si
ISBN/ISSN
00000000
Start Date
15/07/2015
End Date
17/07/2015
From page
1
To page
1
Proceedings of the Sixth International Symposium on Bifurcations and Instabilities in Fluid Dynamics
Participants
  • Autor: Rubén Moreno Ramos (Gulfstream)
  • Autor: Fernando Varas Merida (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
  • Departamento: Matemática Aplicada a la Ingeniería 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)