Transient Localized Rotating Structures in a Suspension of Highly Thermophilic Nanoparticles
Articolo
Data di Pubblicazione:
2022
Citazione:
Transient Localized Rotating Structures in a Suspension of Highly Thermophilic Nanoparticles / M. Carpineti, S. Castellini, A. Pogliani, A. Vailati. - In: FRONTIERS IN PHYSICS. - ISSN 2296-424X. - 10:(2022), pp. 953067.1-953067.7. [10.3389/fphy.2022.953067]
Abstract:
A thermophilic suspension of nanoparticles heated from below exhibits a complex stability diagram determined by the competition between the stabilizing flux of nanoparticles induced by thermophoresis and the destabilizing flux determined by thermal convection. We investigate Rayleigh-Benard convection in a suspension of highly thermophilic nanoparticles with large negative separation ratio psi = -3.5 heated from below. We show that transient localized states appear in the range of Rayleigh numbers 2200 < Ra < 3000. These states rotate rapidly around their axis and gradually shrink in size until the system returns in a purely conductive state. We discuss how these states are originated by the travelling waves arising from the competition between Rayleigh-Benard convection and the solutal stabilisation of the sample.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
thermophilic nanoparticles; Rayleigh-Benard convection; travelling waves; localized structures; convectons
Elenco autori:
M. Carpineti, S. Castellini, A. Pogliani, A. Vailati
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