化工进展2025，Vol.44Issue(5)：2984-2996,13.DOI:10.16085/j.issn.1000-6613.2024-1801
基于格子Boltzmann方法的吸热反应双颗粒沉降模拟
Particle-resolved lattice Boltzmann simulations for sedimentation of catalyst particles with endothermic reaction
摘要
Abstract
The knowledge on the sedimentation of double particles is important in particulate two-phase flows research.In this work,the sedimentation process of dual catalyst particles coupled with chemical reactions was numerically investigated by a particle-resolved immersed boundary-lattice Boltzmann method(IB-LBM)with multiple-relaxation-time scheme.The effects of endothermic reactions on particle hydrodynamic behavior and particle-fluid interaction under medium and low Grashof numbers(Gr)were studied.The results showed that the hydrodynamic behavior of settling reactive particles was influenced by the synergistic effects of particle Gr,Reynolds number(Re),and Damköhler number(Da).For the catalyst particles with surface endothermic reaction,the thermal buoyancy was in the same direction as gravity.With the increase of Gr,the vertical velocity increased,and then the two separated and settled into a more or less fixed longitudinal separation under the effect of thermal convection.In the meantime,both the two particles oscillated laterally with the same frequency.Depending on the magnitude of particle Re,the particle motion mode can be divided into three regimes.With the increase in Re,the effect of thermal convection decreased gradually with the increase of the particle inertia.Da impacted the thermal convection around the particles,leading to an increase in temperature gradient of the fluid surrounding the particles and an enhancement in particle-particle interaction.关键词
浸入边界格子Boltzmann方法/流体动力学/颗粒流/传热Key words
immersed boundary-lattice Boltzmann method/hydrodynamics/granular flow/heat transfer分类
数理科学引用本文复制引用
宋祎祺,李雪,叶茂,刘中民..基于格子Boltzmann方法的吸热反应双颗粒沉降模拟[J].化工进展,2025,44(5):2984-2996,13.基金项目
国家自然科学基金(22108269,22293024,22293021) （22108269,22293024,22293021）
大连化学物理研究所创新研究基金(I202238). （I202238）
