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HEAT AND MASS TRANSFER IN EVAPORATING A TURBULENT LIQUID FILM FALLING ALONG A VERTICAL TUBE

DOI: 10.1615/ICHMT.2008.CHT.1610
10 pages

Saliha Senhaji
Laboratoire d'Ingénierie des Procédés, de l'Energie et de l'Environnement (LIP2E), Ecole Nationale des Sciences Appliquées, B.P. 1136, Agadir - Morocco

M'barek Feddaoui
Laboratory of Energy Engineering, Materials and Systems, ENSA, Ibn Zohr University, Morocco

Touria Mediouni
Laboratoire d'Ingénierie des Procédés, de l'Energie et de l'Environnement (LIP2E), Ecole Nationale des Sciences Appliquées, B.P. 1136, Agadir - Morocco

Rachid Mir
Laboratoire d'Ingénierie des Procédés, de l'Energie et de l'Environnement (LIP2E), Ecole Nationale des Sciences Appliquées, B.P. 1136, Agadir - Morocco

Abstract

This study investigates the evaporation of pure benzene in dry air in an externally insulated tube. A numerical model has been built from the conservation equations in the gas and the liquid phases. The coupled governing equations are solved together with the boundary and interfacial conditions using implicit method. A modified van Driest model has been utilized to formulate the turbulent flow in the liquid film. Results are specifically presented for a benzene-air system under various conditions. In this analysis the coupled effects of inlet liquid temperature and Reynolds number are examined. The results show that better film cooling is observed when liquid is feeding with low Reynolds number and a relatively high inlet liquid temperature.

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