本文放弃湍流粘性假设，直接从雷诺应力输运方程推导出雷诺应力显式表达式。
In this paper the eddy viscosity hypothesis was given up and the explicit expressions of Renolds stresses have been deduced directly from the transport equations of Renolds stresses.
本文从目前常用的平行平板流动腔内流体定常流动时的切应力表达式出发，指出该切应力表达式仅适用于小雷诺数条件，由此确定平行平板流动腔几何尺寸的合理选择；
The paper pointed out that the formula people used to calculate the shear stress was appropriate when Re was small, then gave the rational size of the flow chamber.
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