气体流动时，其内部各层之间产生的摩擦力（或切应力）的性质，称为气体粘性。 气体粘性模型图
因此可以近似地用此模型方程序代替玻氏方程序讨论介于分子流和粘性流之间的过渡区的气体运动情况。
Thus instead of Boltzmann equation this model equation may be approximately used to discuss the motion of gases in the transient region between molecular flow and viscous flow Iimits.
提出了一种解气体-颗粒粘性流动方程组的方法。
A method for solving the gas particle viscous flow equations is presented.
这种岩浆内部气体更多且更具粘性，此次爆发的年夜部门原因很可能是当这种同化物与新的岩浆发生接触。
That magma had more gas and it was more viscous, and this combination probably led to most of the explosive activity when it came into contact with the new magma.
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