1. 3D simulations of impulsive free surface flows using the Lattice Boltzmann Method.
- Author
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Miliani, Stefano, Prestininzi, Pietro, Rocca, Michele La, and Montessori, Andrea
- Subjects
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LATTICE Boltzmann methods , *COMPUTATIONAL fluid dynamics , *MULTIPHASE flow , *ALGEBRAIC equations - Abstract
The Lattice Boltzmann Method (LBM) is a mesoscopic method founded on the kinetic theoryof Boltzmann and has been proven to describe successfully flows of hydraulic interest such asturbulent, multicomponent and multiphase flows. The main advantage of the LBM, comparedto more traditional methods of the Computational Fluid Dynamics, are: the simplicity of theset of explicit algebraic equations forming the computational algorithm, the ease ofdescription of complex boundaries and the proneness of the LBM to provide unprecedentedparallel scalability on a large number of architectures. Thus, the computational resourcesavailable nowadays make the employment of 3D models feasible to study large-scaleproblems as well. In this work, a fully 3D LBM model is developed and applied to the simulation of freesurface impulsive flows. The evolution of the free surface is here tracked by means of a 3Dinterface tracking model and coupled to the traditional LBM algorithm. Dam-breakevents are simulated and LBM numerical results are compared to both analytical andexperimental reference results. The latter are relative to symmetrical dam-break,asymmetrical dam-break, dam-break over a triangular obstacle, dam-break with anisolated building and the laboratory model of the Toce river test case. The accuracy ofthe model is assessed by comparing depth and velocity values, when available,at some gauge locations. The study shows that the LBM provides a remarkablyaccurate description of the phenomena. The results are very promising for futureapplications of this kind of models for the study of realistic hydraulic problems. [ABSTRACT FROM AUTHOR]
- Published
- 2019