Pattern selection in thermal convection in an annulus

Anno: 1990

Autori: Ciliberto S., Bagnoli F., Caponeri M.

Affiliazione autori: Istituto Nazionale di Ottica, Largo E. Fermi 6, 50125 Firenze, Italy

Abstract: We report an analysis of the selected wave vector, as a function of the Rayleigh number, in thermal convection in annular geometry. The patterns have been studied by means of shadowgraph and, more quantitatively, with a sweeping laser beam. The selection processes have been investigated in cells of different sizes. We find that the wavevector increases for radial aspect ratios less than 2, whereas it decreases for larger aspect ratios. The thresholds for time-dependent regimes have also been measured.

Giornale/Rivista: NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA D-CONDENSED MATTER ATOMIC MOLECULAR AND CHEMICAL PHYSICS FLUIDS PLASMAS BIOPHYSICS

Volume: 12 (6)      Da Pagina: 781  A: 792

Parole chiavi: Buoyaney-driven instability; convection and heat transfer;
DOI: 10.1007/BF02464753

Citazioni: 3
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-05-18
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