Chartchay Chumchan and Phadungsak Rattanadecho

DOI: 10.14456/sjst-psu.2020.71

pp. 564 - 572

Abstract

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)