| 并列双柱绕流的格子Boltzmann模拟 |
| |
| 引用本文： | 龚志军,杨佼,武文斐,李保卫. 并列双柱绕流的格子Boltzmann模拟[J]. 水电能源科学, 2013, 31(11): 117-120 |
| |
| 作者姓名： | 龚志军 杨佼 武文斐 李保卫 |
| |
| 作者单位： | 内蒙古科技大学 内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室， 内蒙古 包头 014010;内蒙古科技大学 内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室， 内蒙古 包头 014010;内蒙古科技大学 内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室， 内蒙古 包头 014010;内蒙古科技大学 内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室， 内蒙古 包头 014010 |
| |
| 基金项目： | 内蒙古自然科学基金资助项目（2012MS0712） |
| |
| 摘 要： | 采用格子Boltzmann方法模拟研究了并列双圆柱的绕流现象，利用非平衡外推法进行边界条件处理，基于C++编制程序，获得了不同雷诺数Re和柱间距比H/D下的流速及回流区分布，并分析了并列双柱绕流的流动特性。结果表明，随Re的增大，流场由层流向卡门涡街转变，回流区长度先增大后减小，临界值为Re=50；随H/D的增大，可将流动模式分为单体模式、交替翻转模式、同相模式及反相模式四种，回流区长度在这四种模式下随H/D的增大而增大。
|
| 关 键 词： | 并列双柱； 格子Boltzmann方法； 回流区； 流动模式 |
Numerical Simulation for Cross-flow over Two Cylinders with Lattice Boltzmann Method |
| |
| GONG Zhijun,YANG Jiao,WU Wenfei and LI Baowei. Numerical Simulation for Cross-flow over Two Cylinders with Lattice Boltzmann Method[J]. International Journal Hydroelectric Energy, 2013, 31(11): 117-120 |
| |
| Authors: | GONG Zhijun YANG Jiao WU Wenfei LI Baowei |
| |
| Affiliation: | Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010, China;Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010, China;Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010, China;Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010, China |
| |
| Abstract: | The cross-flow over two cylinders in side-by-side arrangement is simulated with lattice Boltzmann method (LBM). The boundary treatment is conducted with non-equilibrium extrapolation. Based on C++ platform, the velocity distribution and recirculation zone length under different Reynolds numbers and different spacing ratio are obtained. The results show that as Re increases, the flow pattern transforms from laminar flow to Karman vortex street, and the length of the recirculation zone gradually increases and then decreases linearly, the critical value is Re=50. As H/D increases, four kinds of flow patterns can be obtained: single bluff body pattern, alternating inversion pattern, in-phase pattern and reverse pattern. The length of the recirculation zone increases as the H/D increasing in different patterns. |
| |
| Keywords: | parallel cylindrical lattice Boltzmann method recirculation zone flow pattern |
|
|
