TY - GEN
T1 - An Investigation into the Numerical Robustness of High-order Lattice Boltzmann Models
AU - Dzanic, V.
AU - From, C. S.
AU - Sauret, E.
N1 - Publisher Copyright:
© 2020 22nd Australasian Fluid Mechanics Conference, AFMC 2020. All rights reserved.
PY - 2020
Y1 - 2020
N2 - The lattice Boltzmann (LB) method has progressively emerged as a viable numerical tool for studying the dynamics of fluid flows, gaining tremendous popularity given its simplicity, adaptability, and low computational costs associated with solving the Navier-Stokes (NS) equation and beyond. The recent integration of high-order LB models, containing larger quantities of discrete velocity terms have been found to provide enhanced numerical accuracy and stability. Fundamental opportunities for further developments in assessing the performance of these lattices is imperative for future progression and applications involving complex flows, such as turbulence modelling and multiphase mixtures. However, there is still little known when comparing the performance of different high-order models. To this aim, this work presents a numerical investigation into the accuracy and stability of different high-order lattice structures, using the double-shear layer (DSL) benchmark test. The results show that lattice structures with a larger quantity of discrete velocity terms are able to produce more stable and accurate results despite possessing the same order of equilibrium terms and isotropy gradients. Further highlighted is the stability dependence of certain lattice structures on their respective reference temperature. These findings serve to provide a preliminary understanding of when to apply certain lattice structures for specific applications.
AB - The lattice Boltzmann (LB) method has progressively emerged as a viable numerical tool for studying the dynamics of fluid flows, gaining tremendous popularity given its simplicity, adaptability, and low computational costs associated with solving the Navier-Stokes (NS) equation and beyond. The recent integration of high-order LB models, containing larger quantities of discrete velocity terms have been found to provide enhanced numerical accuracy and stability. Fundamental opportunities for further developments in assessing the performance of these lattices is imperative for future progression and applications involving complex flows, such as turbulence modelling and multiphase mixtures. However, there is still little known when comparing the performance of different high-order models. To this aim, this work presents a numerical investigation into the accuracy and stability of different high-order lattice structures, using the double-shear layer (DSL) benchmark test. The results show that lattice structures with a larger quantity of discrete velocity terms are able to produce more stable and accurate results despite possessing the same order of equilibrium terms and isotropy gradients. Further highlighted is the stability dependence of certain lattice structures on their respective reference temperature. These findings serve to provide a preliminary understanding of when to apply certain lattice structures for specific applications.
UR - http://www.scopus.com/inward/record.url?scp=85173578572&partnerID=8YFLogxK
U2 - 10.14264/06b6d9b
DO - 10.14264/06b6d9b
M3 - Conference contribution
AN - SCOPUS:85173578572
T3 - Proceedings of the Australasian Fluid Mechanics Conference (Online)
BT - 22nd Australasian Fluid Mechanics Conference, AFMC 2020
A2 - Chanson, Hubert
A2 - Brown, Richard
PB - Australasian Fluid Mechanics Society
CY - Brisbane
T2 - 22nd Australasian Fluid Mechanics Conference, AFMC 2020
Y2 - 7 December 2020 through 10 December 2020
ER -