Abonnement à la biblothèque: Guest

ISSN Online: 2377-424X

ISBN CD: 1-56700-226-9

ISBN Online: 1-56700-225-0

International Heat Transfer Conference 13
August, 13-18, 2006, Sydney, Australia

NUMERICAL STUDY OF CENTRIFUGAL-BUOYANCY PHENOMENA IN AN ELONGATED LOOP-SHAPED DOMAIN WITH RADIAL HEAT FLOW

Get access (open in a dialog) DOI: 10.1615/IHTC13.p6.200
9 pages

Résumé

Three-dimensional natural air convection developing due to centrifugal buoyancy in a closed loop-shaped domain is studied numerically. The loop is assumed to be heated from the periphery. Two cases are investigated, with the loop plane either perpendicular or parallel to the rotation axis. Computational results are presented for two values of the Rayleigh numbers, equal to 1.6·109 and 6·109, at a fixed value of the rotation parameter. In both cases, intensive global circulation develops in the domain, with a greater flow rate in case of the perpendicular orientation of the loop plane. At that, pronounced flow fluctuations are imposed on the mean circulation. Regions of the highest local heat transfer correspond to areas occupied by the most intensive vortices and are located close to the end surfaces. The results presented are compared with the previously obtained computational data for three-dimensional unsteady natural convection developing under similar thermal conditions in an elongated rectangular cavity rotating in the orthogonal mode.