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Memorias de investigación
Artículos en revistas:
Spontaneous generation of vortex crystals from forced two-dimensional homogeneous turbulence
Año:2007
Áreas de investigación
  • Mecánica de fluidos
Datos
Descripción
he long-term limit of statistically stationary two-dimensional turbulence is shown to depend on the form of the large-scale forcing, in agreement with previous results. That effect is studied systematically by continuously varying the forcing from deterministic to Brownian in direct numerical simulations in doubly periodic boxes. As expected, this switches on or off the enstrophy cascade and the presence of strong coherent structures, but the transition is not monotonic. Under intermediate forcing conditions, the flow evolves to a stationary vortex crystal with triangular lattice, which appears to be stable and to last indefinitely. Deterministic forcings frustrate crystallization through the formation of fast-moving dipoles, and very random ones melt the crystal. The dispersion properties of the different regimes are studied, and it is shown that efficient particle dispersion depends on the presence of multiscale turbulence. The relation with other two-dimensional systems is discussed.
Internacional
Si
JCR del ISI
Si
Título de la revista
PHYS FLUIDS
ISSN
1070-6631
Factor de impacto JCR
1,78
Información de impacto
Volumen
19
DOI
Número de revista
85103
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0
Hasta la página
0
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Participantes
  • Autor: Alan Guegan (Ecole Polytechnique)
  • Autor: Javier Jimenez Sendin (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Mecánica de Fluidos Computacional
  • Departamento: Motopropulsión y Termofluidodinámica
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