//Example 2-5 Determining the Viscosity of Fluid
L = 40 //length of viscometer [cm]
l = 0.15 //gap between two cylinders [cm]
d_o = 12 //outer diameter of inner cylinder [cm]
ndot = 300 //rotational speed of inner cylinder [rpm]
T = 1.8 //torque required to move cylinder [N.m]