INVESTIGADORES
OSENDA Omar
artículos
Título:
Inertial effects on recurrent pattern formation in periodically driven Rayleigh-Benard convection
Autor/es:
OSENDA O.; BRIOZZO C.B.; CACERES M.O.
Revista:
PHYSICA A - STATISTICAL AND THEORETICAL PHYSICS
Referencias:
Año: 1998 vol. 257 p. 325 - 328
ISSN:
0378-4371
Resumen:
Periodically driven Rayleigh-Benard convection is modelled by a
vertical mode expansion of a mean field approximation to the
Oberbeck-Boussinesq equations with thermal noise. The resulting model
generalizes the Lorenz Model introduced by Ahlers, Hohenberg, and Lucke
[Phys. Rev. A 32 (1985) 3493] including the continuous dependence on
the horizontal wavenumber. The model is used to predict the
order-disorder transition experimentally observed in the recurrent
pattern formation near the convective onset, showing that the inclusion
of inertial effects in the description of externally modulated pattern
forming transitions, leads to theoretical predictions for the effects
of thermal noise much closer to the experimental results than those of
previous (purely dissipative) models.