Criteria for the Onset of Flow Recirculation and Onset of Mixed Convection in Vertical Rod Bundles

[+] Author and Article Information
P. D. Symolon

General Electric Company, Schenectady, NY 12301

N. E. Todreas

Department of Nuclear Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139

W. M. Rohsenow

Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139

J. Heat Transfer 109(1), 138-145 (Feb 01, 1987) (8 pages) doi:10.1115/1.3248034 History: Received December 17, 1984; Online October 20, 2009


In a vertical rod bundle with forced upflow and a nonuniform radial power profile, the potential for flow reversal into the low power side of the bundle exists due to buoyancy forces. In this paper a criterion is developed to predict the onset of flow recirculation in rod bundles. The criterion is validated with experimental data for flow recirculation in water-cooled bare rod bundles and with the results of a standard multichannel rod bundle code. A criterion for the onset of mixed convection is also given. Thus, the boundaries between the forced convection, mixed convection, and recirculation regimes are identified. Results are expressed on a flow regime map in terms of the dominant dimensionless parameters (the Reynolds number and a buoyancy parameter B* ) and as a closed-form equation.

Copyright © 1987 by ASME
Your Session has timed out. Please sign back in to continue.





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