Article
Mathematics, Applied
Hirotaka Maeyama, Taro Imamura, Jun Osaka, Naoki Kurimoto
Summary: A novel near-wall modeling approach for large-eddy simulation based on the lattice Boltzmann method is proposed, introducing three innovative ideas and successfully validated through numerical simulations, demonstrating robust and accurate performance.
COMPUTERS & MATHEMATICS WITH APPLICATIONS
(2021)
Article
Mechanics
Yi Zhou, Zhengdao Wang, Yuehong Qian, Hui Yang, Yikun Wei
Summary: This study presents a numerical investigation on flow around two square cylinders in different arrangements, revealing various flow patterns that can be categorized into three types depending on the spacing between the cylinders. The dependence of flow parameters on spacing is demonstrated, and the relationship between flow pattern and lift and drag coefficients is explored.
Article
Mechanics
Zhenyu Ouyang, Jianzhong Lin
Summary: The hydrodynamic behavior of a two-dimensional elongated micro-swimmer in a bulk fluid was studied using numerical methods. The study found that the swimming speed and power expenditure of different types of swimmers varied depending on their structures and the flow conditions.
Article
Computer Science, Software Engineering
Chaoyang Lyu, Wei Li, Mathieu Desbrun, Xiaopei Liu
Summary: This paper proposes an efficient and versatile approach for simulating two-way fluid-solid coupling in the kinetic fluid simulation framework, addressing the challenges of reproducing the interaction between fluids and solids. The novel hybrid approach introduced in the paper ensures a robust and plausible treatment of turbulent flows near moving solids, significantly reducing boundary artifacts. Simple GPU optimizations are also presented to achieve a higher computational efficiency than existing methods.
ACM TRANSACTIONS ON GRAPHICS
(2021)
Article
Engineering, Multidisciplinary
Jian Guo Zhou
Summary: MacLAB is a novel macroscopic lattice Boltzmann method that achieves high precision and efficiency by removing the collision step while retaining the streaming step. MacAxLAB further develops on MacLAB and is applicable for solving incompressible axisymmetric flow equations.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2021)
Article
Mathematics, Applied
Bing He, Chunyan Qin, Wenbo Chen, Binghai Wen
Summary: Not only coughing and sneezing, but even normal breathing can produce aerosols, which are important carriers of various viruses. This paper proposes a numerical model to simulate pulmonary airway reopening and investigates the effects of aerosol formation on epithelial injury and airway pressure.
COMPUTERS & MATHEMATICS WITH APPLICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Jia Xu, TieZhu Qiao, Qing Li, GuoWei Zhang, GuiRong Hao
Summary: This study proposes an optimization method of crystal rotation to improve the quality of crystal seeding under complex convection. By calculating and analyzing the unsteady melt flow rate, internal temperature of the melt, and crystal rotation speed, the results show that this method can effectively restrain melt convection and improve the temperature distribution on the surface of the melt.
Article
Physics, Fluids & Plasmas
Hong Liang, Runlong Wang, Yikun Wei, Jiangrong Xu
Summary: In this paper, an accurate interface-capturing lattice Boltzmann method is proposed based on the modified Allen-Cahn equation for modeling an immiscible multiphase flow system. The proposed method is built on the relation between the signed-distance function and the order parameter, maintaining the mass-conserved characteristic. By carefully incorporating a suitable forcing term, the target equation can be correctly recovered. Simulation results for various interface-tracking problems demonstrate that the proposed model is more numerically accurate, particularly at a small interface-thickness scale, compared to existing lattice Boltzmann models for the conservative Allen-Cahn equation.
Article
Mechanics
M. Sakthivel, Kameswararao Anupindi
Summary: A finite-difference-based axisymmetric off-lattice Boltzmann solver was developed to simulate blood flow through pathological arteries. The irregularity in stenosed arteries was found to increase the magnitudes of wall shear stress profiles while altering the distribution of peaks. Additionally, the presence of irregularity resulted in the formation of extra vortices in the upstream section and potential endothelial damage due to higher shear-layer magnitudes.
Article
Mechanics
Huahai Zhang, Longfei Jia, Shaotong Fu, Xing Xiang, Limin Wang
Summary: This study uses the lattice Boltzmann method coupled with the immersed moving boundary method to perform direct numerical simulations on flow past circular cylinders. By analyzing the cross-flow or in-line oscillation amplitude and frequency of a single cylinder, significant differences in vortex shedding modes inside and outside the lock-in interval are found. The vortex shedding modes of double oscillating cylinders in tandem and side-by-side configurations are also systematically investigated.
Article
Computer Science, Software Engineering
Wei Li, Mathieu Desbrun
Summary: This paper presents an improved numerical simulation method that can accurately simulate complex fluid phenomena and effectively handle fluid-solid coupling. It introduces a series of numerical improvements in momentum exchange, interfacial forces, and two-way coupling to reduce simulation artifacts and expand the types of fluid-solid coupling that can be efficiently simulated. The benefits of the solver are demonstrated through challenging simulation results and comparisons to previous work and real footage.
ACM TRANSACTIONS ON GRAPHICS
(2023)
Article
Computer Science, Software Engineering
Wei Li, Yihui Ma, Xiaopei Liu, Mathieu Desbrun
Summary: This paper proposes a new solver for coupling the incompressible Navier-Stokes equations with a conservative phase-field equation to simulate multiphase flows. The resulting solver shows efficiency, versatility, and reliability in dealing with large density ratios, high Reynolds numbers, and complex solid boundaries.
ACM TRANSACTIONS ON GRAPHICS
(2022)
Article
Thermodynamics
Xiaofei Zhu, Sen Wang, Qihong Feng, Lei Zhang, Li Chen, Wenquan Tao
Summary: This study employed a lattice Boltzmann model to validate the flow of three immiscible fluids in three-dimensional porous media, and analyzed the effects of wettability, viscosity ratio, and capillary number on relative permeability curves in detail.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Mechanics
Shang-Gui Cai, Sajad Mozaffari, Jerome Jacob, Pierre Sagaut
Summary: This paper applies an immersed boundary-turbulence wall modeling approach to investigate turbulent flows over a generic car geometry, known as the Ahmed body. The study shows that the near-wall solution is significantly deteriorated compared to the body-fitted simulation, but enhanced wall treatments proposed in the literature can effectively address this issue.
Article
Mathematics, Applied
Xun Zhou, Miaomiao Liu, Bo Dong, Weizhong Li, Kunfeng Liang
Summary: In this study, lattice Boltzmann modeling is used to simulate the primary liquid film breakup for a planar prefilming atomizer, with a focus on the effects of prefilmer edge configuration. The results show that a prefilmer with convergent edge configurations significantly improves the primary liquid film breakup. The convergent prefilmer edge restricts liquid film accumulation and enhances airflow shearing effects, leading to a decrease in ligament breakup length and an increase in frequency.
COMPUTERS & MATHEMATICS WITH APPLICATIONS
(2023)
