Validating a numerical framework for resolved simulations of vaporizing droplets

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dc.contributor.authorPalmore, John A., Jr.en
dc.contributor.authorDesjardins, O.en
dc.date.accessioned2022-02-11T17:10:54Zen
dc.date.available2022-02-11T17:10:54Zen
dc.date.issued2018-07-26en
dc.date.updated2022-02-11T17:10:51Zen
dc.description.abstractStandard practice when simulating spray combustion is to represent the spray as a collection of droplets which vaporize and subsequently combust. Empirical models are used to approximate the process of droplet vaporization, however, these models were largely developed for isolated droplets in uniform flow. These models also typically neglect the influence of droplet deformation and internal heat transfer on vaporization. The impact of these assumptions on the accuracy of model predictions still needs to be evaluated. One natural way to study this, is the comparison of data from direct numerical simulations with that of spray models. The current work demonstrates a direct numerical simulation framework for simulating vaporizing liquid-gas flows with a focus towards spray combustion. The framework builds from first principles as the governing equations are developed directly from the principles of conservation of mass, momentum, and energy without the introduction of empirical models. A VOF method is used for interface transport, which is coupled with a robust momentum solver for high density ratio flows. Scalar transport is performed using BQUICK for advection and an unconditionally stable monotone scheme for diffusion. Thermodynamic equilibrium at the interface is handled using the Clausius-Clapeyron relation. This initial study focuses on validating the framework against known solutions for single droplet vaporization in simple flows. Numerical simulations in three dimensions are compared to analytical solutions and the accuracy of the framework is verified. Comparisons with experimental correlations for vaporizing droplets in uniform flow indicate a good match between numerical and experimental results.en
dc.description.notesYes, full paper (Peer reviewed?)en
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.orcidPalmore, John [0000-0001-6054-9191]en
dc.identifier.urihttp://hdl.handle.net/10919/108312en
dc.language.isoenen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.titleValidating a numerical framework for resolved simulations of vaporizing dropletsen
dc.title.serialICLASS 2018 - 14th International Conference on Liquid Atomization and Spray Systemsen
dc.typeConference proceedingen
dc.type.dcmitypeTexten
dc.type.otherConference Proceedingen
pubs.organisational-group/Virginia Techen
pubs.organisational-group/Virginia Tech/Engineeringen
pubs.organisational-group/Virginia Tech/Engineering/Mechanical Engineeringen
pubs.organisational-group/Virginia Tech/All T&R Facultyen
pubs.organisational-group/Virginia Tech/Engineering/COE T&R Facultyen

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