基于格子Boltzmann方法的平板射流大涡模拟

计算物理 ›› 2015, Vol. 32 ›› Issue (6): 669-676.

基于格子Boltzmann方法的平板射流大涡模拟

上官燕琴, 王娴, 李跃明

西安交通大学航天航空学院机械结构强度与振动国家重点实验室, 西安碑林 710049

收稿日期:2015-03-11 修回日期:2015-03-14 出版日期:2015-11-25 发布日期:2015-11-25
作者简介:上官燕琴(1991-),女,博士研究生,主要研究方向:湍流的数值模拟,E-mail:sgyq.6510336@stu.xjtu.edu.cn
基金资助:
国家973计划(2003CB30570202);国家自然科学基金(11302165)资助项目

High-Performance Numerical Simulation of Jet in Cross-Flow Based on Lattice Boltzmann Method

SHANGGUAN Yanqin, WANG Xian, LI Yueming

State Key Laboratory for Strength and Vibration of Mechanical Structures, School of Aerospace, Xi'an Jiaotong University, 28 Xianning West Road, Xi'an 710049, China

Received:2015-03-11 Revised:2015-03-14 Online:2015-11-25 Published:2015-11-25
Contact: 王娴(1977-),女,汉族,吉林,副教授,博士生导师,主要研究方向:基于CPU/GPU体系的大规模并行计算、湍流的数值模拟、两相流的数值模拟,E-mail:wangxian@mail.xjtu.edu.cn

摘要/Abstract

摘要： 应用多GPU技术,将格子Boltzmann方法与大涡模拟相结合(LBM-LES),使用1.12×10⁸网格,对雷诺数Re=4 000,倾斜角α=30°,吹风比M=0.5工况下的平板单孔射流进行了大规模高性能数值模拟研究.合理的定性与定量结果验证了LBM-LES模拟平板射流的有效性与可行性.使用上亿的计算网格捕捉了精细的湍流拟序结构,有利于主流与射流之间的掺混机理研究.此外,使用6个K20M GPU并行计算,模拟了71 680 LBM时间步长,仅耗时15 402秒,计算性能达到521.24MLUPS,即每秒更新5.212 4×10⁸个网格点的数据.

关键词: 格子Boltzmann方法(LBM), 大涡模拟(LES), 多GPU, 三维平板射流(JICF)

Abstract: Large eddy simulation (LES) with 1.12×108 meshes was performed on three-dimensional jet in cross-flow(JICF) using lattice Boltzmann method (LBM) and multiple Graphic Processing Units (Multi-GPUs). Reynolds number based on free-stream velocity and jet diameter is 4 000, streamwise inclination angle of jet is α=30°, and jet-to-cross-flow velocity ratio is set as 0.5. Validity and feasibility of LBM-LES on simulating jet in cross-flow were verified by reasonable qualitative and quantitative results. Fine coherent structures were captured by large-scaled simulation which benefits study on mixing mechanism of jet-in-cross-flow(JICF). Moreover, 6 K20M GPUs were adopted in simulation and it took 15 402 seconds for LBM-GPU solver to simulate 71 680 LBM steps resulting in calculated performance of 521. 24 MLUPS.

Key words: lattice Boltzmann method(LBM), large eddy simulation(LES), multiple Graphic Processing Units(Multi-GPUs), jet in cross-flow(JICF)

中图分类号:

O358

上官燕琴, 王娴, 李跃明. 基于格子Boltzmann方法的平板射流大涡模拟[J]. 计算物理, 2015, 32(6): 669-676.

SHANGGUAN Yanqin, WANG Xian, LI Yueming. High-Performance Numerical Simulation of Jet in Cross-Flow Based on Lattice Boltzmann Method[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2015, 32(6): 669-676.

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