Given value : Kinematic viscosity (υ)=2.25 stokes =2.25×10−4m2/s diameter of pipe (d) = 20 cm. = 0.20 m Rate of flow (Q)= 1.5 ltr/s = 1.5 × 10−3 m3/s We know that Re=
ρvd
µ
or =
vd
υ
=
0.047×.20
2.25×10−4
=41 Hence reynold no. less than 2000, the flow is laminar.