Implementation of a flexible and modular multiphase framework for the analysis of surface-tension-driven flows based on a LS-VOF approach

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Abstract

The mathematical modelling and numerical simulation of multi-phase flows are both a demanding and highly complex exercise. In typical problems with industrial relevance, the fluids are often in non-isothermal conditions and interfacial phenomena are a relevant part of the problem. A number of effects due to the presence of temperature differences must be adequately taken into account to make the results of numerical simulations consistent and realistic. Moreover, in general, gradients of surface tension at the interface separating two liquids are a source of numerical issues that can delay (and even prevent completely in some circumstances) the convergence of the solution algorithm. Here, we propose a fundamental and concerted approach for the simulation of the typical dynamics resulting from the presence of a dispersed phase in an external matrix in nonisothermal conditions based on the modular computer-aided design, modelling, and simulations capabilities of the OpenFOAM environment. The resulting framework is tested against the migration of a droplet induced by thermocapillary effects in the absence of gravity. The simulations are fully three-dimensional and based on an adaptive mesh refinement (AMR) strategy. We describe in detail the countermeasures taken to circumvent the problematic issues associated with the simulation of this kind of flows.
Original languageEnglish
Title of host publicationOpenFOAM®
Subtitle of host publicationSelected Papers of the 11th Workshop
EditorsJoão Nóbrega, Hrvoje Jasak
Place of Publication[S.I.]
PublisherSpringer
Pages1-14
Number of pages14
Edition1
ISBN (Print)9783319608457
Publication statusPublished - 12 Apr 2018
Event11th OpenFOAM® Workshop - Guimarães, Portugal
Duration: 26 Jun 201630 Jun 2016
http://www.openfoamworkshop.org

Conference

Conference11th OpenFOAM® Workshop
CountryPortugal
CityGuimarães
Period26/06/1630/06/16
Internet address

Keywords

  • surface-tension effects
  • multi-phase flows

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