TY - GEN
T1 - Investigation of the MRT-LBM with and without free surface flows
T2 - 6th ECCOMAS European Conference on Computational Mechanics: Solids, Structures and Coupled Problems, ECCM 2018 and 7th ECCOMAS European Conference on Computational Fluid Dynamics, ECFD 2018
AU - Sato, Kenta
AU - Koshimura, Shunichi
N1 - Publisher Copyright:
copyright © Crown copyright (2018).All right reserved.
PY - 2020
Y1 - 2020
N2 - The lattice Boltzmann method (LBM) is an alternative simulation tool describing incompressible fluids. In recent years, it has become clear that the lattice BGK model has limitations for high-accuracy calculations. By contrast, the advanced multiple-relaxation-time (MRT) model is attracting more attention to overcome the defects of the BGK model. The objectives of this study are to verify and validate the MRT-LBM with and without free surface flows. We have performed (i) a comparison of the MRT-LBM and BGK-LBM to clarify the accuracy in two-dimensional cavity flows, (ii) a numerical simulation with the MRT-LBM's free surface model in standing waves benchmark problem. We found that the MRT-LBM has superior accuracy over the BGK-LBM in the cavity flows even in solid wall boundaries. Moreover, the MRT-LBM can controlled the compressibility drop in the 2nd order value of the Mach number in free surface flow.
AB - The lattice Boltzmann method (LBM) is an alternative simulation tool describing incompressible fluids. In recent years, it has become clear that the lattice BGK model has limitations for high-accuracy calculations. By contrast, the advanced multiple-relaxation-time (MRT) model is attracting more attention to overcome the defects of the BGK model. The objectives of this study are to verify and validate the MRT-LBM with and without free surface flows. We have performed (i) a comparison of the MRT-LBM and BGK-LBM to clarify the accuracy in two-dimensional cavity flows, (ii) a numerical simulation with the MRT-LBM's free surface model in standing waves benchmark problem. We found that the MRT-LBM has superior accuracy over the BGK-LBM in the cavity flows even in solid wall boundaries. Moreover, the MRT-LBM can controlled the compressibility drop in the 2nd order value of the Mach number in free surface flow.
KW - Free surface flows
KW - Lid-driven cavity flows
KW - Standing waves analysis
KW - The lattice Boltzmann method
KW - The multiple-relaxation-time model
UR - http://www.scopus.com/inward/record.url?scp=85081052918&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85081052918&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85081052918
T3 - Proceedings of the 6th European Conference on Computational Mechanics: Solids, Structures and Coupled Problems, ECCM 2018 and 7th European Conference on Computational Fluid Dynamics, ECFD 2018
SP - 4253
EP - 4264
BT - Proceedings of the 6th European Conference on Computational Mechanics
A2 - Owen, Roger
A2 - de Borst, Rene
A2 - Reese, Jason
A2 - Pearce, Chris
PB - International Centre for Numerical Methods in Engineering, CIMNE
Y2 - 11 June 2018 through 15 June 2018
ER -