Convection in the cavity between two rollers: the effect of thermal boundary conditions

In this study the authors examine the convective cooling provided by fluid trapped in the cavity between two consecutive rollers in a roller bearing. Previous studies of roller bearing heat transfer characteristics have a dealt almost exclusively with the generation and partition of heat transfer at the point of rolling contact. Details of the fluid flow and heat transfer inside the hour-glass-shaped cavity were analyzed for the first time in the first part of the present study (Litsek and Bejan, 1990). That work was based on an overly simplified model in which the heat flux from the roller to the cavity fluid was assumed uniform over the roller surface. Furthermore, the temperature of both runners was assumed uniform and equal to the ambient temperature. Reviewers of the first paper recommended that we continue this work by relying on alternative thermal boundary conditions at the interfaces between rollers and cavity fluid, and between runners and cavity fluid. The paper is the result of this recommendation.

Duke Authors

Cited Authors

  • Litsek, PA; Zhang, Z; Bejan, A

Published Date

  • 1991

Published In

  • Journal of Heat Transfer

Volume / Issue

  • 113 / 1

Start / End Page

  • 249 - 251

Citation Source

  • SciVal