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RESEARCH PAPERS

A Numerical Analysis of Heat Transfer to Fluids Near the Thermodynamic Critical Point Including the Thermal Entrance Region

[+] Author and Article Information
N. M. Schnurr, A. B. Shapiro

Department of Mechanical Engineering, Vanderbilt University, Nashville, Tenn.

V. S. Sastry

Department of Mechanical Engineering, Tennessee State University, Nashville, Tenn.

J. Heat Transfer 98(4), 609-615 (Nov 01, 1976) (7 pages) doi:10.1115/1.3450608 History: Received February 17, 1976; Online August 11, 2010

Abstract

A two-dimensional numerical method has been developed to predict heat transfer to near critical fluids in turbulent flow through circular tubes. The analysis is applicable to the thermal entry region as well as fully developed flows. Agreement with experimental data for water at 31.0 MN/m2 is quite good. A correlation in the form of the heat flux parameter of Goldmann was found to be satisfactory for water at that pressure. Results are presented in graphical form which apply to a wide range of heat fluxes, mass velocities, and tube diameters. Preliminary results in the entrance region show that film coefficients remain well above the corresponding fully developed values for a larger distance downstream than would be the case with a constant property fluid. This effect becomes more pronounced as the heat flux is increased.

Copyright © 1976 by ASME
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