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). He...

The synthetic turbulence generator (STG) lies at the interface of Reynolds averaged Navier–Stokes (RANS) simulation and large-eddy (LES). This paper presents an STG for multiple-relaxation-time lattice Boltzmann method (LBM) framework high friction numbers, with consideration near-wall modeling. Reichardt wall law, in combination a force-based method, is used to model field. wall-modeled LES re...

In this contribution a numerical study of a turbulent jet flow is presented. The simulation results of two different variants of the Lattice Boltzmann method (LBM) are compared. The first is the well-established D3Q19 MRT model extended by a Smagorinsky Large Eddy Simulation (LES) model. The second is the D3Q27 Factorized Cascaded Lattice Boltzmann (FCLB) model without any additional explicit t...

We report on the validation of a 3D hybrid model for naval hydrodynamics based on a perturbation method, where velocity and pressure are the sum of an inviscid flow with a viscous perturbation. The farto near-field inviscid flows can be solved with a BEM, based on potential flow theory and the near-field perturbation flow is solved with a NS model based on a Lattice Boltzmann Method (LBM). We g...

The paper presents a synthetic turbulence generator (STG) for the lattice Boltzmann method (LBM) at interface of Reynolds averaged Navier–Stokes (RANS) equations and LBM large eddy simulation (LES). We first obtain RANS velocity field from finite volume solver interface. Then, we apply numerical interpolation to due different grid types LBM. STG generates fluctuations, regularized reconstructs ...

A thermal lattice Boltzmann method (TLBM) is used for analysis of flow and heat transfer in two-dimensional channels. Simulation results are presented for thermal Couette and thermal Poiseuille channel flows. Analytical solution for temperature field in hydraulically and thermally developed flows are used to verify the current TLBM results. The method is further applied to study the forced conv...

We investigate the influence of boundary slip velocity in Newtonian fluids at finite Reynolds numbers. Numerical simulations with Lattice Boltzmann method (LBM) and Finite Differences method (FDM) are performed to quantify the effect of heterogeneous boundary conditions on the integral and local properties of the flow. Non linear effects are induced by the non homogeneity of the boundary condit...

Lattice Boltzmann Method (LBM) is used to simulate the lid driven cavity flow to explore the mechanism of non-Newtonian fluid flow. The power law model is used to represent the class of non-Newtonian fluids (shear-thinning and shear-thickening fluids) by considering a range of 0.8 to 1.6. Investigation is carried out to study the influence of power law index and Reynolds number on the variation...

The hydraulic conductivity (K) represents an important hydrophysical parameter in a porous media. K direct measurements, usually demand a lot of work, are expensive and time consuming. Factors such as the media spatial variability, sample size, measurement method, and changes in the sample throughout the experiment directly affect K evaluations. One alternative to K measurement is computer simu...

The hydro-mechanical coupling transport process of sand production is numerically investigated with special attention paid to the bonding effect between sand grains. By coupling the lattice Boltzmann method (LBM) and the discrete element method (DEM), we are able to capture particles movements and fluid flows simultaneously. In order to account for the bonding effects on sand production, a cont...