| 基于UGKS的过渡区方柱绕流数值研究 |
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| 引用本文： | 代连福,刘振宇,吴慧英.基于UGKS的过渡区方柱绕流数值研究[J].工程热物理学报,2021,42(4):953-958. |
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| 作者姓名： | 代连福 刘振宇 吴慧英 |
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| 作者单位： | 上海交通大学工程热物理研究所,上海200240 |
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| 基金项目： | 国家自然科学基金资助项目(No.51536005,No.51820105009)。 |
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| 摘 要： | 本文基于统一气体动理学格式(Unified Gas Kinetic Scheme,UGKS),对微尺度过渡区气体绕流方柱开展数值模拟研究,计算分析了Kn数对气体流动传热过程的影响规律。研究发现,随着Kn数增加,方柱壁面气体速度滑移和温度跳跃增大,壁面上压力、剪切力和热流也相应增大,方柱壁面-气体之间的换热得到强化;方柱对气体流动的阻碍作用减小,方柱前滞止区影响范围相对增大,方柱温度对柱后区域气体温度影响相对减小。
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| 关 键 词： | UGKS 过渡区 方柱 传热 可压缩 |
Numerical Simulation of Gas Flow Over Square Cylinder in Transition Regime Based on UGKS |
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| DAI Lian-Fu,LIU Zhen-Yu,WU Hui-Ying.Numerical Simulation of Gas Flow Over Square Cylinder in Transition Regime Based on UGKS[J].Journal of Engineering Thermophysics,2021,42(4):953-958. |
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| Authors: | DAI Lian-Fu LIU Zhen-Yu WU Hui-Ying |
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| Institution: | (Institute of Engineering Thermophysics,Shanghai Jiao Tong University,Shanghai 200240,China) |
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| Abstract: | Microscale gas flow over square cylinder in transition regime is numerical simulated in present work based on unified gas kinetic scheme(UGKS).The effect of Knudsen number(Kn)on gas flow and heat transfer is analyzed.It is found that:with the increase of Kn,the velocity slip and temperature jump on square cylinder boundary increase;pressure,shear stress and heat flux on square cylinder surface also increase;the heat transfer between square cylinder surface and gas is enhanced;obstruction on gas caused by square cylinder decreases;stagnation zone before square cylinder enlarges;the effect of square cylinder temperature on gas temperature behind square cylinder deceases. |
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| Keywords: | UGKS transition regime square cylinder heat transfer compressible |
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