Wall shear stress

(Difference between revisions)

Revision as of 08:22, 22 November 2011

The wall shear stress, $\tau_w$ , is given by:

$\tau_w = \mu \left(\frac{\partial u}{\partial y} \right)_{y=0}$

Where $\mu$ is the dynamic viscosity, $u$ is the flow velocity parallell to the wall and $y$ is the distance to the wall.

The SI unit of the kinematic viscosity is $Pa$ or $\frac{kg}{m\cdot s^2}$ .

Revision as of 14:49, 18 December 2008 (view source) Peter (Talk \| contribs) m (Reverted edits by AcellIcotr (Talk) to last version by Jola) ← Older edit		Revision as of 08:22, 22 November 2011 (view source) Zonder (Talk \| contribs) (add unit) Newer edit →
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	Where <math>\mu</math> is the [[Dynamic viscosity\|dynamic viscosity]], <math>u</math> is the flow velocity parallell to the wall and <math>y</math> is the distance to the wall.		Where <math>\mu</math> is the [[Dynamic viscosity\|dynamic viscosity]], <math>u</math> is the flow velocity parallell to the wall and <math>y</math> is the distance to the wall.
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		+	The SI unit of the kinematic viscosity is <math>Pa</math> or <math>\frac{kg}{m\cdot s^2}</math>.