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Advisor(s)
Abstract(s)
Problems involving multiphase flows require a physical understanding of how the phenomenadevelop and the specific interactions they manifest. For surface tension relevant flows, suchas bubbles and droplets, the importance of modelling and predicting small-scale behaviouris crucial in accurately defining the liquid-gas interface and complex interactions that may takeplace. Axisymmetric numerical simulations of single droplets impacting onto thin liquid films areperformed using commercial and open-source CFD codes. ANSYS Fluent®is the commercialsoftware employed, whereas Basilisk is the open-source CFD solver adopted. The incompress-ible Navier-Stokes equations are coupled and handled differently throughout each software.A solution-adaptive mesh refinement tool is adopted to reduce computational cost. Softwarecomparison is based on quantitative and qualitative analysis, namely crown height and outerdiameter measurements, and the crown curvature and occurrence of splashing, respectively.Results show that Basilisk simulations are in good agreement with the experimental data. Fluent follows the tendency for the crown outer diameter however, in terms of height, the modelunder-predicts its growth and collapses at later stages of the impact for lower thicknesses
Description
Keywords
Droplet impact VOF method Numerical simulation Multiphase flow Crown evolution
Citation
Daniel Vasconcelos, André Silva, Jorge Barata Comparison of Commercial and Open-Source CFD Solvers on Surface Tension Dominated Flows ICLASS 2021 - 15th Triennial International Conference on Liquid Atomization and Spray Systems, Edimburgo, Reino Unido, 29 Agosto - 2 Setembro, 2021
Publisher
University of Edinburgh Journal Hosting Service