Laminar Flow Friction and Heat Transfer in Non- Circular Ducts and Channels Part II: Thermal Problem

Muzychka, Y. S. and Yovanovich, M. M. (2002) Laminar Flow Friction and Heat Transfer in Non- Circular Ducts and Channels Part II: Thermal Problem. In: Compact Heat Exchangers: a festschrift on the 60th birthday of Ramesh K. Shah : proceedings of the International Symposium on Compact Heat Exchangers, Grenoble, August 24, 2002. Edizioni ETS, Pisa, pp. 131-139.

	[English] PDF (Migrated (PDF/A Conversion) from original format: (application/pdf)) - Published Version Available under License Creative Commons Attribution Non-commercial. Download (630kB) [English] PDF - Published Version Available under License Creative Commons Attribution Non-commercial. (Original Version)

Abstract

A detailed review and analysis of the thermal characteristics of laminar developing and fully developed flow in non-circular ducts is presented. New models are proposed which simplify the prediction of Nusselt numbers for three fundamental flows: the combined entrance problem, the Graetz problem, and thermally fully developed flow in most non-circular duct geometries found in heat exchanger applications. By means of scaling analysis it is shown that the complete problem may be easily analyzed by combining the asymptotic results for short and long ducts. By means of a new characteristic length scale, the square root of cross-sectional area, the effect of duct shape has been reduced. The new model has an accuracy of ± 10 percent, or better, for most common duct shapes. Both singly and doubly connected ducts are considered.

Actions (login required)

View Item