Work

Experimental investigations in an air-filled differentially-heated cavity at large Rayleigh Numbers

Year: 2012

Type: conference-paper

Abstract: A large-scale experimental differentially heated cavity was built and instrumented. Rayleigh numbers up to 1.2 × 10 11 can be obtained with a temperature difference, ΔT = 20°C, between the hot and cold walls leaning in the range of validity of the Boussinesq approximation. Previous data obtained locally for mean velocity by 2D LDV in the range give rise to questions regarding the general air flow circulation in the cavity. Particularly, a downstream flow along the vertical boundary layer was observed. This reverse flow caused by the temperature stratification outside this layer is not present in the upstream parts and was not previously observed in smaller cavities. The question of the global circulation in this cavity is thus posed. Evolution laws providing Nusselt numbers are also given and when possible compared to the literature for a large range of Rayleigh numbers.

Source: Journal of Physics Conference Series

DOI: 10.1088/1742-6596/395/1/012119

Authors: P Belleoud, D Saury, P Joubert, D Lemonnier, F Djanna

Institutions: Centre National de la Recherche Scientifique, École Nationale Supérieure de Mécanique et d'Aérotechnique, Institut Pprime, Université de Poitiers, Laboratoire des Sciences de l'Ingénieur pour l'Environnement

Language: English

Topic: Fluid Dynamics and Turbulent Flows

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

Open Access status: diamond

Funder: Centre National de la Recherche Scientifique

OpenAlex ID: W1990975480

FWCI: 1.968

Cites: 7

Cited by: 8

Related to: 10