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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

THE MECHANISM OF CONVECTIVE HEAT TRANSFER PRODUCED BY TRANSVERSE VORTICES

Get access (open in a dialog) DOI: 10.1615/IHTC16.hte.022631
pages 5477-5484

Résumé

The transverse ribs in different shapes can be found in many industrial applications to enhance heat transfer, such as in the channel of the blade of turbo machines, and the mini-corrugated waves used in the electric cooling system to increase the heat transfer ability of the base plate on which the electronic components are mounted. The ribs and the mini- corrugated waves mainly produce transverse vortices. The mechanism of convective heat transfer produced by these transverse vortices is not clear. In this paper, the transport equation of the heat flux is used to account for the mechanism of convective heat transfer produced by these transverse vortices. A channel between one mini-grooved surface and a plain surface located at a mini-distance is analyzed numerically for the single-phase laminar flow with water as coolant and a constant heat flux is supplied to the base plate wall. The computation domain is divided into two regions with coupled boundary conditions based on SIMPLE algorithm. The flow structure, the production of heat flux with velocity component gradient, the production of heat flux component gradient with velocity as well as the overall mean Nusselt number and the friction factor are investigated. The influences of the production of heat flux with velocity component gradient as well as the production of heat flux component gradient with velocity on convective heat transfer are highlighted.