浸没边界格子Boltzmann方法的改进及转动圆柱绕流模拟

摘要

Based on Suzuki's immersed boundary lattice Boltzmann method, an improved approach is pro⁃posed. By adopting the force model of the lattice Boltzmann method and improving the technique of fluid structure interaction force calculation, the process of calculating the force of fluid structure interaction is simplified. Moreover,its calculation time is over 50%shorter than that of the original method, which means that efficiency is greatly improved. Based on the improved method, such features as lift coefficient, drag co⁃efficient,pressure coefficient and flow field are discussed under different conditions of flow over a rotating cylinder. Compared with the related results, this new improved method is shown to be accurate and reliable.%针对浸没边界格子Boltzmann方法计算效率不足的问题，提出一种改进浸没边界格子Boltzmann方法。通过使用作用力格子Boltzmann模型，并简化流固耦合作用力的计算方法，使计算流程得到简化，同时，对比原方法转动圆柱绕流计算结果，计算时间缩短一半以上，提高了数值计算效率。结合改进算法研究转动圆柱绕流的流场升阻力系数、压力系数、流场速度等流体参数场随转速比的关系，揭示了一定的转动圆柱绕流动力学规律。研究结果表明，改进方法准确可靠。