Home  >>  Mixing Guide  >>  Static Mixing Guide  >>  Blending  >>  Viscosity Effects

Viscosity Effects

As the absolute viscosity increases, the pressure drop increases slightly in turbulent flow, and is directly proportional to the viscosity in laminar flow.Increasing the viscosity also reduces the Reynolds number, which must then be evaluated to ensure that the flow regime has not changed.

Other than its effect on Reynolds number and pressure drop the viscosity is said not to effect the degree of blending. The main precaution is to ensure that the static mixer has the correct number of elements based on the Reynolds number.

The absolute viscosity does effect the scale of mixing. It is reduced by the increasing viscosity, but partially offset by the increase in pressure drop. This follows standard Kolmogroff’s theory of turbulence.