d1=4*1e-6//m(Diameter of clay particle)
d2=1e-3//m(Diameter of sand particles)
p=9764//N/m^3(Weight density of water)
S2=2.65//specific gravity of sand particles
S1=1.6//specific gravity of clay particles
v=0.8*1e-3//N.s/m^2(Kinematic viscosity at 30 degree celsius)
Cd=0.7
r=995.7//(kg/m^3)Mass density of water