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解析粗糙单元的粗糙壁湍流大涡模拟
Authors
何国威
晋国栋
李世隆
杨晓雷
Publication date
3 December 2020
Publisher
Abstract
粗糙壁湍流广泛存在于自然界和工程应用的诸多领域,对其深入研究具有重要的理论价值和现实意义。针对具有复杂粗糙壁面的槽道湍流,本文采用清晰界面浸入边界方法进行了解析粗糙单元的大涡模拟,对模拟结果进行了深入地分析,并将清晰界面浸入边界方法预测的湍流统计量(包括流向速度和雷诺应力等)与文献中采用体积分数法的预测结果进行了对比,发现本研究预测的粗糙度长度高于文献结果。相比于体积分数法,清晰界面浸入边界方法可以更准确地满足粗糙单元上的边界条件。对模拟结果的进一步分析显示这是造成两种方法计算结果差别的主要原因
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Institute Of Mechanics,Chinese Academy of Sciences
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Last time updated on 02/03/2021