A large-eddy-based lattice Boltzmann model for turbulent flow simulation

ABSTRACTA three-dimensional, prognostic Atmospheric Boundary Layer Environment–Lattice Boltzmann Model (ABLE-LBM) using the multiple-relaxation-time lattice Boltzmann method was developed for large-eddy simulation of urban boundary layer atmospheric flows. In this article we describe the details of the ABLE-LBM for urban flow, its implementation of complex boundaries, and the subgrid turbulence parameterizations. As a first validation of this newly developed model, the simulation results were evaluated with two wind-tunnel datasets that were collected using particle image velocimetry and Irwin probes, respectively. The ABLE-LBM simulations use the same building layout and Reynolds numbers used in the laboratory wind tunnels. The ABLE-LBM simulations compare favorably to both laboratory studies in terms of the mean wind fields. The turbulent fluxes simulated by the model in the observational planes also agreed reasonably well with the laboratory results. The model produced urban canyon flows and vortices on the lee side and over the building tops that are similar to those of the laboratory studies in strength and location. This validation study using laboratory data indicates that our new ABLE-LBM is a viable approach for modeling atmospheric turbulent flows in urban environments. A numerical implementation using a graphics processing unit shows that real-time simulations are achieved for these two validation cases.

Download Full-text

A lattice Boltzmann model for the non-equilibrium flocculation of cohesive sediments in turbulent flow

Computers & Mathematics with Applications ◽

10.1016/j.camwa.2013.03.023 ◽

2014 ◽

Vol 67 (2) ◽

pp. 381-392 ◽

Cited By ~ 5

Author(s):

Zhang Jinfeng ◽

Zhang Qinghe ◽

Qiao Guangquan

Keyword(s):

Turbulent Flow ◽

Lattice Boltzmann ◽

Lattice Boltzmann Model ◽

Cohesive Sediments ◽

Boltzmann Model ◽

Non Equilibrium

Download Full-text

Gaseous slip flow simulation in a micro/nano pore-throat structure using the lattice Boltzmann model

Journal of Petroleum Science and Engineering ◽

10.1016/j.petrol.2019.02.029 ◽

2019 ◽

Vol 177 ◽

pp. 93-103 ◽

Cited By ~ 4

Author(s):

Nader Mosavat ◽

Babak Hasanidarabadi ◽

Peyman Pourafshary

Keyword(s):

Lattice Boltzmann ◽

Slip Flow ◽

Flow Simulation ◽

Lattice Boltzmann Model ◽

Pore Throat ◽

Gaseous Slip Flow ◽

Boltzmann Model

Download Full-text

Lattice Boltzmann Thermal Flow Simulation and Measurements of a Modified SAE Model With Heated Plug

Volume 2: Fora ◽

10.1115/fedsm2006-98467 ◽

2006 ◽

Cited By ~ 19

Author(s):

Ehab Fares ◽

Sacha Jelic ◽

Timo Kuthada ◽

David Schro¨ck

Keyword(s):

Lattice Boltzmann ◽

Flow Simulation ◽

Lattice Boltzmann Model ◽

The Novel ◽

Predictive Capability ◽

Road Vehicles ◽

Wall Model ◽

New Developments ◽

Experimental Findings ◽

Boltzmann Model

This article presents the novel experiment of the modified SAE model with a heated plug and discusses the details about the new developments of the numerical model of the PowerFLOW 4.0 version, which employs a Lattice Boltzmann model and incorporates an improved unsteady two equations RNG k-ε turbulence model, a coupled PDE for the energy equation and an advanced wall model for both flow and thermal boundary layers. The hot flow is discussed both experimentally and numerically. Distributions of the flow field are compared with available experimental findings. The predictive capability and the feasibility of the current Lattice Boltzmann approach is demonstrated and the applicability to similar flows over realistic road vehicles is discussed.

Download Full-text