APPLICATIONS OF FINITE-DIFFERENCE LATTICE BOLTZMANN METHOD TO BREAKUP AND COALESCENCE IN MULTIPHASE FLOWS

Daniele Chiappini (), Gino Bella (), Sauro Succi () and Stefano Ubertini ()
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Daniele Chiappini: Department of Mechanical Engineering, University of Rome Tor Vergata, Viale del Politecnico 1, Rome, 00133, Italy
Gino Bella: Department of Mechanical Engineering, University of Rome Tor Vergata, Viale del Politecnico 1, Rome, 00133, Italy
Sauro Succi: IAC-CNR, Via dei Taurini 19, Rome, 00185, Italy
Stefano Ubertini: University of Naples Parthenope, Isola-C4 Centro Direzionale, Naples, 80143, Italy

International Journal of Modern Physics C (IJMPC), 2009, vol. 20, issue 11, 1803-1816

Abstract: We present an application of the hybrid finite-difference Lattice-Boltzmann model, recently introduced by Lee and coworkers for the numerical simulation of complex multiphase flows.1–4Three typical test-case applications are discussed, namely Rayleigh–Taylor instability, liquid droplet break-up and coalescence. The numerical simulations of the Rayleigh–Taylor instability confirm the capability of Lee's method to reproduce literature results obtained with previous Lattice-Boltzmann models for non-ideal fluids. Simulations of two-dimensional droplet breakup reproduce the qualitative regimes observed in three-dimensional simulations, with mild quantitative deviations. Finally, the simulation of droplet coalescence highlights major departures from the three-dimensional picture.

Keywords: Droplet breakup; coalescence; kinetic approach; 11.25.Hf; 123.1K (search for similar items in EconPapers)
Date: 2009
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DOI: 10.1142/S0129183109014746

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