Author(s): Enbo Xing; Qinghe Zhang; Jinfeng Zhang; Guangwei Liu

Linked Author(s):

Keywords: Flow around structure; High Reynolds number; Cumulant lattice Boltzmann method; Characteristic boundary condition; Turbulence model

Abstract: High Reynolds number flow around structure is a common phenomenon in river and coastal engineering. A new three-dimensional flow model is presented by using cumulant LBM combined with the characteristic outflow boundary condition. The accuracy and the stability of different cumulant schemes were tested. The original cumulant scheme and the cumulant scheme with both the optimal parameter and limiter show good stability. The model with different cumulant schemes and turbulence model was validated against experimental measurement of three-dimensional flow around structure reported in the literature and compared with other numerical models like OpenFOAM and EllipSys3D in this work. The validation results show that the velocity at different elevations and the wall shear stress are well captured by our model. This indicates that the presented model has the ability to simulate three-dimensional high Reynolds number flow around structure cases.

DOI: https://doi.org/10.3850/978-90-833476-1-5_iahr40wc-p1658-cd

Year: 2023