SONGKLANAKARIN JOURNAL OF SCIENCE & TECHNOLOGY

Volume 42, No. 03, Month MAY, Year 2020, Pages 564 - 572

Experimental and numerical investigation of dam break flow propagation passed through complex obstacles using les model based on fvm and lbm

Chartchay Chumchan and Phadungsak Rattanadecho

Abstract Download PDF

Dam break analysis plays a key role in hydraulics engineering for safety. In this paper, 3D numerical simulations of dam-break flow using Finite Volume and Lattice Boltzmann methods are studied and discussed. All the computation in this work is achieved by ANSYS Fluent and XFlow. Large Eddy Simulation (LES) is employed as the turbulence model and the free surface flow is captured using a Volume of Fluid (VOF) model in the two simulation approaches. Results are then compared with experimental data on dam-break flow through complex obstacles. This experimental data is obtained by a high-speed camera aiming to capture free surface waves. The comparison between the experimental data and simulations shows good tendency. However, LBM requires less computational time.

Keywords

dam-break, Volume of Fluid (VOF), Finite Volume Method (FVM), Lattice Boltzmann Method (LBM), Large-eddy simulation (LES)

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