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Evaporation rates of pure hydrocarbon liquids under the influences of natural convection and diffusion
Authors:Peter L. Kelly-Zion  Christopher J. Pursell  Ryan S. Booth  Alec N. VanTilburg
Affiliation:1. Engineering Science Department, Trinity University, San Antonio, TX 78212, USA;2. Chemistry Department, Trinity University, San Antonio, TX 78212, USA;1. Clean Combustion Research Centre, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia;2. Mechanical Engineering Department, Faculty of Engineering, Alexandria University, Alexandria 21544, Egypt;3. Sir Harry Ricardo Laboratories, Centre for Automotive Engineering, School of Computing, Engineering and Mathematics, University of Brighton, Brighton BN2 4GJ, United Kingdom;1. National Research Tomsk Polytechnic University, 30 Lenin Ave., Tomsk 634050, Russia;2. Institute of Thermophysics Siberian Branch, Russian Academy of Sciences, Lavrentiev Ave. 1, Novosibirsk 630090, Russia;1. Kutateladze Institute of Thermophysics of the Siberian Branch of the Russian Academy of Sciences, Lavrentiev Ave. 1, Novosibirsk, 630090, Russia;2. National Research Tomsk Polytechnic University, 30 Lenin Ave., Tomsk, 634050, Russia
Abstract:Evaporation of liquid hydrocarbons was studied in order to better understand the relative influences of diffusion and buoyancy-induced convection of the vapors on the evaporation rate. Evaporation rates were measured using a simple gravimetric technique and the behavior of the vapor layer that quickly forms above the film was observed using schlieren imaging. Even for conditions for which the influence of buoyancy is strong, the evaporation rates are well correlated by a one-dimensional diffusion model if an effective vapor layer thickness is used.
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