Analysis of The Rayleigh Number in the Area of Steel Rectangular Sections in the Conditions of Stedy and Unstedy Heat Flow/ Analiza Liczby Rayleigha W Obszarze Stalowych Profili Prostokątnych W Warunkach Ustalonego I Nieustalonego Przepływu Ciepła

Rafał Wyczółkowski

doi:10.1515/ceer-2014-0029

3/2014 vol. 14

ORIGINAL ARTICLE

Analysis of The Rayleigh Number in the Area of Steel Rectangular Sections in the Conditions of Stedy and Unstedy Heat Flow/ Analiza Liczby Rayleigha W Obszarze Stalowych Profili Prostokątnych W Warunkach Ustalonego I Nieustalonego Przepływu Ciepła

Rafał Wyczółkowski ¹

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Department of Industrial Furnaces and Environmental Protection, Czestochowa University of Technology, Al Armii Krajowej 19, 42-200 Częstochowa, Poland

Online publication date: 2015-02-06

Publication date: 2014-09-01

Civil and Environmental Engineering Reports 2014;14(3):107-118

DOI: https://doi.org/10.1515/ceer-2014-0029

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References (11)

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ABSTRACT

The paper presents the experimental measurements dedicated to the research for the Rayleigh number (Ra) in the area of rectangular steel sections. This problem is associated with the analysis of the free convection which takes place in the heating of sections bundles during the heat treatment. The study was conducted for both steady and transient heat transfer. The values of the Ra number obtained for the tested sections allow to describe the phenomenon of convection on the basis of a very simple criterial dependence. It greatly simplifies the mathematical description of the heat transfer phenomenon in the concerned charges.

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