The impacts of the activity coefficient on heating and evaporation of ethanol/gasoline fuel blends

Nawar Al-Esawi, Mansour Al Qubeissi, Sergei S. Sazhin, Reece Whitaker

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    21 Citations (Scopus)
    68 Downloads (Pure)


    The evolutions of droplet radii and temperatures for ethanol and gasoline fuels and their blends are investigated using a modified version of the Discrete Component (DC) model, taking into account the effect of the activity coefficient (AC). The universal quasi-chemical functional–group AC (UNIFAC) model is used to predict the ACs of the blended ethanol and gasoline fuels approximated by 21 components. In contrast to previous studies, it is shown that droplet lifetimes predicted for pure gasoline are not always shorter than those predicted for ethanol/gasoline blends. They depend on the total vapour pressure of the mixture. It is shown that the original DC model predicts ethanol/gasoline fuel droplet lifetimes with errors up to 5.7% compared to those predicted using the same model but with the ACs obtained from the UNIFAC model.
    Original languageEnglish
    Pages (from-to)177-182
    Number of pages6
    JournalInternational Communications in Heat and Mass Transfer
    Early online date26 Sept 2018
    Publication statusPublished - Nov 2018

    Bibliographical note

    NOTICE: this is the author’s version of a work that was accepted for publication in International Communications in Heat and Mass Transfer. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Communications in Heat and Mass Transfer, Vol 98 (2018) DOI: 10.1016/j.icheatmasstransfer.2018.08.018

    © 2017, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International


    • Heat Transfer
    • Mass transfer
    • Fuel blends
    • Modelling and analysis
    • Biofuel
    • Gasoline
    • Droplet
    • Thermodynamics
    • Thermodynamic properties

    ASJC Scopus subject areas

    • Fluid Flow and Transfer Processes
    • Automotive Engineering
    • Mechanical Engineering
    • Fuel Technology


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