Lattice Boltzmann method for rain-induced overland flow

Yang

2019

Water

Self Cite

Microplastic particles are easily captured by microorganisms and enter the food chain, which poses a threat to ecological health. These particles are abundant in coastal areas because of the influence of anthropic activities and the interaction between the sea and land. Although much research on microplastics has been done, predicting the transportation of microplastic particles in coastal zones is still a challenge. In this paper, the trajectories of microplastic particles released from four river mouths around Laizhou Bay are investigated using the lattice Boltzmann method coupled with the Lagrangian particle-tracking method, involving inter-particle and particle-wall collisions. The trajectories of particles released from four river mouths are recorded within 30 days.

Section: Lattice Boltzmann Methodsmentioning

confidence: 99%

Numerical Prediction of the Short-Term Trajectory of Microplastic Particles in Laizhou Bay

Ding

Yang

2019

Water

Self Cite

“…In general, overland runoff is laterally orthogonal or oblique to the mainstream. The overland flow is simulated using the LBM by Ding et al (2018). For a prismatic channel (without considering the sectional changes), 2D shallow water equations are used as the governing equations in this case, written as…”

Section: Governing Equationsmentioning

confidence: 99%

“…The procedure for treating complex boundary and terrain conditions in an LBM framework achieves mathematical simplification (Zhou, 2004). The LBM was tested in rain‐induced overland flows and channel flow simulations, and achieved high stability and accuracy (Ding, Liu, Peng, & Xing, 2018; Zhang, Feng, & Yang, 2015). Moreover, the LBM has a good foreground in solving the advection–diffusion equation (ADE).…”

Section: Introductionmentioning

confidence: 99%

Lattice Boltzmann simulation of channel flow with unsteady lateral overland inflow

Ding

2022

River Research & Apps

Self Cite

This study presents a numerical model for the catchment‐stream problem based on shallow water equations with a lateral source term. A two‐dimensional (2D) lattice Boltzmann equation with an external source term is developed, in which both the mass and momentum are considered. The proposed scheme is validated by a V‐shaped catchment case against analytical solutions and other results from traditional models. The lattice Boltzmann scheme shows good stability at rather low water depths on a mild slope and provides reliable simulated results. Then, the scheme is applied to an open channel flow with a continuous pollutant source, and the impact of the additional lateral momentum on the pollutant distribution is investigated in the stable state.

“…Rainfall has an effect on the surface water and runoff, causes soil erosion and floods, and contaminants transport. A numerical model should be applied to investigate how rainfall influences water flow [32]. In the LBM, the local equilibrium distribution function g eq α for shallow water equations with source term was developed.…”

Section: Rainfallmentioning

confidence: 99%

Numerical Analysis of the Impact Factors on the Flow Fields in a Large Shallow Lake

Zhu

et al. 2019

Water

Self Cite

Wetland acts as an important part of climatic regulation, water purification, and biodiversity maintenance. As an integral part of wetlands, large shallow lakes play an essential role in protecting ecosystem diversity and providing water sources. Baihe Lake in the Momoge Wetland is one such example, so it is necessary to study the flow pattern characteristics of this lake under different conditions. A new model, based on the lattice Boltzmann method, was used to investigate the effects of different impact factors on flow fields, such as water discharge from surrounding farmland, rainfall, wind speed, and aquatic vegetation. Importantly, this study provides a hydrodynamic basis for local ecological protection and restoration work.