Dynamic viscosity

(Difference between revisions)

Revision as of 11:02, 4 October 2006

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

The dynamic viscosity is related to the kinematic viscosity by

$\mu=\rho\cdot\nu$

where $\rho$ is the density and $\nu$ 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

This article is a stub, a short article which needs to be improved. You can help by expanding it.

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-The SI physical 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 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
@@ Line 5: / Line 5: @@
 <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
 {{stub}}
 [[Category:Turbulence models]]