0
RESEARCH PAPERS

Non-Darcian Convection in Cylindrical Packed Beds

[+] Author and Article Information
M. L. Hunt, C. L. Tien

Department of Mechanical Engineering, University of California, Berkeley, CA 94720

J. Heat Transfer 110(2), 378-384 (May 01, 1988) (7 pages) doi:10.1115/1.3250495 History: Received June 15, 1987; Online October 20, 2009

Abstract

Non-Darcian transport describes the nonuniform flow and thermal anomalies often found in flow through packed beds. These effects include the high-flow-rate inertial pressure loss, near-wall porosity variation, solid-boundary shear, and thermal dispersion. Inclusion of these effects significantly alters the velocity and temperature profiles from those predicted by models using uniform or Darcian flow. In this paper, the non-Darcian formulation is used to predict the heat transfer rates for cylindrical packed beds such as chemical reactors. Traditional analyses of chemical reactors assume slug flow and must include a temperature-slip boundary condition to predict the measured temperature profiles. The present analysis predicts similar temperature variations by allowing the velocity and diffusivity to vary across the bed. The results agree with experimental data for chemical reactors and do not depend on the extensive experimental relations needed in conventional reactor models.

Copyright © 1988 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In