Equilibrium flow of a general fluid through a cylindrical tube

Equilibrium flow of a general fluid through a long, straight, cylindrical tube is examined, and equations are derived for determining the three pertinent material functions, the shear stress component, the difference between the radial and angular normal stress components, and the difference between the axial and angular normal stress components. These equations are expressed in terms of quantities which are measurable. Experimental data are obtained for a polymer solution, and the material functions are calculated.