Evaporating droplets: comparisons between DNS and modelling

Benjamin Duret, Mansour Al Qubeissi, Sergei Sazhin, Cyril Crua

Research output: Chapter in Book/Conference proceeding with ISSN or ISBNConference contribution with ISSN or ISBN

Abstract

This study focuses on preliminary analysis of the heating and evaporation processes in a spherical moving droplet using Direct Numerical Simulation (DNS) and simplified modelling approaches. DNS of two-phase flows is used to obtain detailed information about heat and mass transfer at the interface. The DNS results are compared with the results predicted by the modelling approach, based on the analytical solution to the heat transfer equation inside the droplet. The latter approach takes into account the finite thermal conductivity and recirculation inside droplets using the effective thermal conductivity (ETC) model. The ETC model has been widely used by the scientific community since it was originally developed by Abramzon and Sirignano more than 25 years ago, although its range of applicability has never been rigorously investigated. The comparison between DNS and modelling results is performed for a wide range of Peclet numbers in the analysis of transient heating of droplets without evaporation. A DNS database has been created. DNS results are shown to be rather different from the modelling results when the model is used for relatively low Peclet numbers. These results, however, turned out to be in good agreement for relatively high Peclet numbers
Original languageEnglish
Title of host publicationILASS – Europe 2014, 26th Annual Conference on Liquid Atomization and Spray Systems
Place of PublicationBremen, Germany
PublisherILASS
Pages0-0
Number of pages1
ISBN (Print)9783887227449
Publication statusPublished - 1 Jan 2014
EventILASS – Europe 2014, 26th Annual Conference on Liquid Atomization and Spray Systems - Bremen, Germany, 8-10 September, 2014
Duration: 1 Jan 2014 → …

Conference

ConferenceILASS – Europe 2014, 26th Annual Conference on Liquid Atomization and Spray Systems
Period1/01/14 → …

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    Duret, B., Al Qubeissi, M., Sazhin, S., & Crua, C. (2014). Evaporating droplets: comparisons between DNS and modelling. In ILASS – Europe 2014, 26th Annual Conference on Liquid Atomization and Spray Systems (pp. 0-0). ILASS.