Transitional Heat Transfer and Pressure Drop in Plain Horizontal Tubes

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

doi:10.15866/ireche.v7i2.6264

Transitional Heat Transfer and Pressure Drop in Plain Horizontal Tubes

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

^(*) Corresponding author

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Abstract

The heat transfer and pressure drop experiments in the transition region for water flowing in smooth horizontal tube have been carried out in this study. The available correlations for predicting the heat transfer coefficient and friction factor are reviewed and their accuracy has been evaluated based on over 350 experimental data points. The experiments were conducted on a 14 mm inner diameter horizontal tube in which the water was heated. The variation of the Reynolds and Prandtl numbers was in the ranges: 1.2 × 103 < Re < 1.7 × 104 and 3.5 < Pr < 10. The variation of the Grashof number was 1.3 × 104 < Gr < 3.3 × 105. The results have been compared with the correlations of Gnielinski, Churchill and experimental results of Meyer and Olivier.
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Keywords

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

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