Dynamic viscosity
From CFD-Wiki
(Difference between revisions)
m |
|||
Line 9: | Line 9: | ||
For the use in CFD, dynamic viscosity can be defined by different ways: | For the use in CFD, dynamic viscosity can be defined by different ways: | ||
* as a constant | * as a constant | ||
- | * as a function of temperature (e.g. piecewise-linear, piecewise-polynomial, polynomial, by [[Sutherland's law]] or by the [[Power law]]) | + | * as a function of temperature (e.g. piecewise-linear, piecewise-polynomial, polynomial, by [[Sutherland's law]] or by the [[Power-law viscosity law|Power law]]) |
* by using [[Kinetic Theory]] | * by using [[Kinetic Theory]] | ||
* composition-dependent | * composition-dependent |
Revision as of 21:01, 17 May 2007
The SI unit of dynamic viscosity (Greek symbol: ) is the pascal-second (), which is identical to .
The dynamic viscosity is related to the kinematic viscosity by
where is the density and 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