Direct numerical simulation of three-dimensional particle-laden thermal convection using the Lattice Boltzmann Method

Wu，Hongcheng; Karzhaubayev，Kairzhan; Shen，Jie; Wang，Lian Ping

2024-05-30

10.1016/j.compfluid.2024.106268

Computers and Fluids   影响因子和分区

0045-7930

In thermal multiphase flows, the modulation in the heat transfer rate due to the presence of finite-size solid particles attract growing interest in recent years. This study focuses on developing a robust and efficient simulation method for particle-laden Rayleigh-Bénard convection. The present work utilizes the double distribution function-based thermal lattice-Boltzmann method (TLBM), which enables successful simulations of multiphase fluid-thermal interactions. The no-slip boundary of the moving solid particles is handled by the interpolated bounce-back scheme. Additionally, Galilean invariant momentum exchange and heat exchange approaches are employed for hydrodynamic force and heat transfer calculation at the solid boundaries. The accuracy of the current method is verified with several benchmark cases, including three-dimensional single-phase Rayleigh-Bénard convection, as well as the settling of hot and cold spherical particles in a three-dimensional enclosure. Furthermore, we explore the modulation of Rayleigh-Bénard flows due to the presence of freely moving finite-size particles. The simulations are conducted on a distributed memory cluster with a 3D domain decomposition technique facilitated by the MPI library. A brief discussion on the parallel performance of the simulations is provided for both particle-laden and single-phase flow scenarios. Finally, the effects of finite-size solid particles on the overall heat transfer efficiency and modulation to the flow field in three-dimensional particle-laden turbulent Rayleigh-Bénard convection are discussed. The results show that addition of solid particles results in a moderate increase in the overall Nusselt number, and this enhancement is mainly due to the increased heat flux transported by the particles.

Heat transfer Lattice Boltzmann method MPI Particle-laden flow Thermal convection

SCI ; EI

英语

第一

COMPUTER SCIENCE

2-s2.0-85190321159

Scopus

Guangdong Provincial Key Laboratory of Turbulence Research and Applications,Center for Complex Flows and Soft Matter Research and Department of Mechanics and Aerospace Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China

Wu，Hongcheng,Karzhaubayev，Kairzhan,Shen，Jie,et al. Direct numerical simulation of three-dimensional particle-laden thermal convection using the Lattice Boltzmann Method[J]. Computers and Fluids,2024,276.

Wu，Hongcheng,Karzhaubayev，Kairzhan,Shen，Jie,&Wang，Lian Ping.(2024).Direct numerical simulation of three-dimensional particle-laden thermal convection using the Lattice Boltzmann Method.Computers and Fluids,276.

Wu，Hongcheng,et al."Direct numerical simulation of three-dimensional particle-laden thermal convection using the Lattice Boltzmann Method".Computers and Fluids 276(2024).