Ansys Fluent provides several options for definition of the fluid viscosity:
temperature-dependent and/or composition-dependent viscosity
Each of these input options and the governing physical models are detailed in this section. (User-defined functions are described in the Fluent Customization Manual). In all cases, define the Viscosity in the Create/Edit Materials Dialog Box.
Please refer 8.4. Viscosity (ansys.com) .
There are 2 types of viscosities - dynamic and kinematic
Absolute viscosity - coefficient of absolute viscosity - is a measure of internal resistance. Dynamic (absolute) viscosity is the tangential force per unit area required to move one horizontal plane with respect to an other plane - at an unit velocity - when maintaining an unit distance apart in the fluid.
Kinematic viscosity is the ratio of - absolute (or dynamic) viscosity to density - a quantity in which no force is involved. Kinematic viscosity can be obtained by dividing the absolute viscosity of a fluid with the fluid mass density like
ν = μ / ρ
kinematic viscosity= dynamic viscosity/ density.
This should solve your misunderstanding.