Transitional Heat Transfer and Pressure Drop in Plain Horizontal Tubes – Revised Study

Ventsislav Dimov Zimparov; Plamen J. Bonev; Valentin M. Petkov

doi:10.15866/ireche.v9i1.11598

Transitional Heat Transfer and Pressure Drop in Plain Horizontal Tubes – Revised Study

Ventsislav Dimov Zimparov^(1*), Plamen J. Bonev⁽²⁾, Valentin M. Petkov⁽³⁾

^(*) Corresponding author

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Abstract

This paper is a revised version of an earlier publication of Zimparov et al. [1] and presents an advanced development of the correlations for calculating the friction factor and heat transfer coefficients in the transition region for water flowing in smooth horizontal tube. The experiments have been fulfilled again at much smaller driving temperature difference than in the earlier study [1]. The experimental correlations for predicting the heat transfer coefficient and friction factor obtained earlier have been adjusted based on 112 new experimental data points. The experiments were conducted with a tube-in-tube heat exchanger in a counter flow configuration. The variation of the Reynolds and Prandtl numbers was in the ranges: 1.1×10^3 < Re < 1.2×10^4 and 3.9 < Pr < 10.4. The results have been compared with the correlations of Churchill [3], Gnielinski [14], Taler [16] and experimental results of Olivier [9].
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Keywords

Smooth Horizontal Tube; Transitional Flow; Heat Transfer; Pressure Drop

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References

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