RATIO of dynamic viscosity and density of the fluid.\(kinematic~ viscosity= \frac {dynamic ~ viscocity}{density ~of ~fluid}\)\(ν = \frac {μ}{ρ }\)SI UNIT = m2 / s CGS unit = Stokes or cm2 / S1 Stoke = 10-4 m2 / s Dynamic Viscosity ( µ )Viscosity can be defined as the measure of a fluid's resistance to deformation at a given flow.Caused by friction within a fluid.Result of intermolecular forces between the PARTICLES within a fluid.SI unit N-s/m2 or Pa-s.SHEAR stress is given by,\(Shear\;stress = \;\mu \;\frac{{du}}{{dy}}\)where,µ = Dynamic Viscosity of fluid\(\frac{u}{y}\)= Rate of shear deformation