Study on Design the Stop Pipe Diameter of Packaging Viscous Fluid

The distribution of the speed and shear stress in viscous fluid with the laminar flow in the pipe were analyzed in this paper, then, the flow rate was calculated. Moreover, the stop pipe diameter was designed by calculating the balance of shear stress of viscous fluid in the pipe and the gravity of filling fluid. Analysis have The conclusions : stop pipe diameter of viscous fluid is proportional to viscosity and the square root of pipe length, and is inversely proportional to the acceleration of gravity and the square root of the filling factor.