# Chapter2-Fundamental Concepts¶

## Ex2-pg29¶

In [1]:
##Liquid Viscosity(in cp):
#calculate Shear stres on the upeer plate and lower plate
u=0.65;
##Specific gravity:
SG=0.88;
##Density of water(in slug/ft**3):
d=1.94;
##Velocity with which plate is moved(in m/sec):
U=0.3;
##Distance between the plates(in mm):
D=0.3;

##Viscosity and stress##

##Viscosity in units of lbf-s/ft**2:
u1=u/100./454./32.2*30.5
##Kinematic viscosity (in m/sec**2):
v=u1/SG/d*(0.305)**2.
##Shear stress on the upper plate(lbf/ft**2):
tu=u1*U/D*1000.
##Shear stress on the lower plate(in Pa)
tl=tu*4.45/0.305**2.
print("RESULTS")
print'%s %.5f %s'%("Viscosity in units of lbf-s/ft^2:",u1," $lbf-s/ft^2") print'%s %.7f %s'%("Kinematic viscosity: ",v," m/sec^2") print'%s %.4f %s'%("Shear stres on the upeer plate:",tu," lbf/ft^2") print'%s %.2f %s'%("Sear stress on the lower plate: ",tl," Pa")  RESULTS Viscosity in units of lbf-s/ft^2: 0.00001$lbf-s/ft^2
Kinematic viscosity:  0.0000007  m/sec^2
Shear stres on the upeer plate: 0.0136  lbf/ft^2
Sear stress on the lower plate:  0.65  Pa