In zeropressuregradient flow, this local momentum loss is Minost an additive constant quantity. On the other hand, adverse pressure gradient results in amplification of this momentum loss.
在零压力梯度下，这个局部的动量损失几乎是一个附加的常量，而逆压梯度则会扩大这种动量损失。
2
The increasing rates of pressuregradient of two sides of outburst coal decrease with the increase of gas pressure and reach to zero at last.