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An efficient lattice Boltzmann multiphase model for 3D flows with large density ratios at high Reynolds numbers
Publikationstyp
Journal Article
Date Issued
2014-11-01
Sprache
English
Institut
TORE-URI
Volume
68
Issue
12
Start Page
1819
End Page
1843
Citation
Computers and Mathematics with Applications 68 (12): 1819-1843 (2014)
Publisher DOI
Scopus ID
Publisher
Elsevier Science
We report on the development, implementation and validation of a new Lattice Boltzmann method (LBM) for the numerical simulation of three-dimensional multiphase flows (here with only two components) with both high density ratio and high Reynolds number. This method is based in part on, but aims at achieving a higher computational efficiency than Inamuro et al.'s model (Inamuro et al., 2004). Here, we use a LBM to solve both a pressureless Navier-Stokes equation, in which the implementation of viscous terms is improved, and a pressure Poisson equation (using different distribution functions and a D3Q19 lattice scheme); additionally, we propose a new diffusive interface capturing method, based on the Cahn-Hilliard equation, which is also solved with a LBM. To achieve maximum efficiency, the entire model is implemented and solved on a heavily parallel GPGPU co-processor. The proposed algorithm is applied to several test cases, such as a splashing droplet, a rising bubble, and a braking ocean wave. In all cases, numerical results are found to agree very well with reference data, and/or to converge with the discretization.
Subjects
Breaking wave
Drop impact
High density ratio
Lattice Boltzmann method
Multiphase flows
Rising bubble
DDC Class
530: Physik
Funding Organisations
US National Sciences Foundation (NSF)
More Funding Information
The authors wish to acknowledge support from grant OCE-09-27014 of the US National Sciences Foundation (NSF) Physical Oceanography Program.