泊肃叶定律描述的是在一水平圆筒状管中,当牛顿流体作稳定层流时,管内流体的体积流量Q与管的一些几何参量等的关系。基于不同流层流速不同的特点,教材中大多采用先微分后积分的方法来求Q.本文采用一种比较简单易懂的方法,同样可以推导出该定律。 Poiseuille’s law describes the relationship between the volumetric flow rate Q of a fluid in a horizontal cylindrical tube and the geometric parameters of the tube when Newtonian fluid is stably laminar. Based on the different characteristics of the different velocity of flow in the stratosphere, most of the teaching materials adopt the method of first differentiating and then integrating to find Q. This method can also be deduced by a relatively simple and easy to understand method.