本文采用直接模拟蒙特卡罗方法对稀薄气体二维外部柱体绕流问题进行了数值模拟.结果表明:外部绕流问题,在特定情况下会产生激波,激波的产生,不仅与气体的稀薄程度有关,还与来流马赫数有关.而气流与壁面之间的换热,随来流马赫数增加而增加,随气体稀薄程度增加而减小.
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