Accession Number : AD0495362

Title :   Calculations Relative to the Thermal Entry Length for Fluids of Low Prandtl Number,

Corporate Author : CALIFORNIA UNIV BERKELEY INST OF ENGINEERING RESEARCH

Personal Author(s) : Seban, R. A. ; Shimazaki, T.

Report Date : 10 JAN 1950

Pagination or Media Count : 29

Abstract : Calculations are presented for the variation of the heat transfer coefficient in the region downstream from the point at which a fluid of constant properties having uniform initial temperature and a velocity distribution characteristic of fully developed pipe flow is subjected to a constant wall temperature different from the initial fluid temperature. The determination of heat transfer coefficients is made for a Prandtl Number of 0.01 and Reynold's Numbers of 10,000 and 100,000. The results indicate thermal entry lengths that are substantially shorter than indicated by the analysis of V. D. Sanders.

Descriptors :   *PRANDTL NUMBER), (*HEAT TRANSFER, FLUID FLOW, TURBULENCE, VELOCITY, MATHEMATICAL MODELS, DIFFUSION, TRANSPORT PROPERTIES, REYNOLDS NUMBER, TEMPERATURE, FLOW FIELDS.

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE