| 摘要:基于格子玻尔兹曼方法（lattice Boltzmann method， LBM）对低雷诺数下椭球体颗粒的流动和传热特性进行数值模拟研究。通过对比分析不同流态下的阻力相关性及试验基础上的平均努塞特数关系式，借助球体和其他数据库对照参考，验证椭球体颗粒模型的适用性。结果表明，椭球体颗粒的阻力系数和传热特性不仅受雷诺数影响，还与颗粒的几何参数密切相关。与传统球形颗粒假设相比，椭球体颗粒模型能够更准确地反映颗粒与流体的相互作用，尤其在高雷诺数和复杂流场条件下。此外，LBM方法在处理复杂边界和多相流问题上展现出独特优势，为非球形颗粒的阻力、升力和努塞特数研究提供了高效工具。 |
| 关键词: 椭球体粒子 LBM方法 阻力系数 传热特性 |
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| Effects of Spheroid Particle Geometric Parameters on Flow and Heat Transfer in a Laminar Flow Environment |
| XIONG Peilin,LI Hongmei,QI Jiang,ZHU Yang,JU Dehao |
| National Key Laboratory of Marine Engine Science and Technology， Shanghai 201108， China;Shanghai Marine Diesel Engine Research Institute， Shanghai 201108， China |
| Abstract:The flow and heat transfer characteristics of ellipsoidal particles at low Reynolds numbers using the lattice Boltzmann method （LBM）was numerically investigated.The applicability of the ellipsoidal particle model was validated by comparing drag correlations and average Nusselt number relationships under different flow conditions with experimental data，using spherical particles and other datasets as references.The results show that the drag coefficient and heat transfer characteristics of ellipsoidal particles are not only influenced by the Reynolds number but also closely related to the geometric parameters of the particles. Compared with the traditional spherical particle assumption，the ellipsoidal particle model can more accurately reflect the interaction between particles and fluids，especially under high Reynolds numbers and complex flow conditions.Additionally，the LBM method demonstrates unique advantages in handling complex boundaries and multiphase flow problems，providing an efficient tool for studying the drag，lift，and Nusselt number of non-spherical particles. |
| Key words: ellipsoidal particle LBM method drag coefficient heat transfer characteristic |
