Dynamic viscosity

The SI unit of dynamic viscosity (Greek symbol: <math>\mu</math>) is the pascal-second (<math>Pa\cdot s</math>), which is identical to  <math>1 \frac{kg}{m\cdot s}</math>.

The dynamic viscosity is related to the kinematic viscosity by
<center>
<math>\mu=\rho\cdot\nu</math>
</center>
where <math>\rho</math> is the [[density]] and <math>\nu</math> is the [[kinematic viscosity]].

For the use in CFD, dynamic viscosity can be defined by different ways:
* as a constant
* as a function of temperature (e.g. piecewise-linear, piecewise-polynomial, polynomial, by [[Sutherland's Law]] or by the [[Power Law]])
* by using [[Kinetic Theory]]
* composition-dependent
* by non-Newtonian models

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[[Category:Turbulence models]]