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本文用直接模拟蒙特卡罗方法对给定进出口压力边界条件下微通道内气体的流动换热特性进行了数值模拟,给出了壁面与流体的温差对气体沿程压力、温度及数密度分布的影响.计算结果表明,当壁温高于流体温度时,温差仅出现在通道进出口处,但其发生机理却不同;流体可压缩性与稀薄性均得到增强,沿程压力分布更加非线性.

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