Print Email Facebook Twitter Simulating liquid droplets Title Simulating liquid droplets: A quantitative assessment of lattice Boltzmann and Volume of Fluid methods Author Mukherjee, S. (TU Delft ChemE/Transport Phenomena) Zarghami, A. (TU Delft Intensified Reaction and Separation Systems) Haringa, C. (TU Delft ChemE/Transport Phenomena) van As, K. (TU Delft ChemE/Transport Phenomena) Kenjeres, S. (TU Delft ChemE/Transport Phenomena) van den Akker, H.E.A. (TU Delft ChemE/Transport Phenomena; University of Limerick) Date 2018 Abstract While various multiphase flow simulation techniques have found acceptance as predictive tools for processes involving immiscible fluids, none of them can be considered universally applicable. Focusing on accurate simulation of liquid-liquid emulsions at the scale of droplets, we present a comparative assessment of the single-component multiphase pseudopotential lattice Boltzmann method (PP-LB, classical and modified) and the Volume of Fluid method (VOF, classical and modified), highlighting particular strengths and weaknesses of these techniques. We show that a modified LB model produces spurious velocities 1–3 orders of magnitude lower than all VOF models tested, and find that LB is roughly 10 times faster in computation time, while VOF is more versatile. Simulating falling liquid droplets, a realistic problem, we find that despite identical setups, results can vary with the technique in certain flow regimes. At lower Reynolds numbers, all methods agree reasonably well with experimental values. At higher Reynolds numbers, all methods underpredict the droplet Reynolds number, while being in good agreement with each other. Particular issues regarding LB simulations at low density ratio are emphasized. Finally, we conclude with the applicability of VOF vis-à-vis PP-LB for a general range of multiphase flow problems relevant to myriad applications. Subject EmulsionsLiquid dropletsMultiphase flowsPseudopotential Lattice BoltzmannVolume of fluid To reference this document use: http://resolver.tudelft.nl/uuid:a80c7f65-ccf7-4d0e-bf1e-73e82d0c440d DOI https://doi.org/10.1016/j.ijheatfluidflow.2017.12.001 Embargo date 2020-02-10 ISSN 0142-727X Source International Journal of Heat and Fluid Flow, 70, 59-78 Bibliographical note Accepted Author Manuscript Part of collection Institutional Repository Document type journal article Rights © 2018 S. Mukherjee, A. Zarghami, C. Haringa, K. van As, S. Kenjeres, H.E.A. van den Akker Files PDF final_preprint.pdf 7.46 MB Close viewer /islandora/object/uuid:a80c7f65-ccf7-4d0e-bf1e-73e82d0c440d/datastream/OBJ/view