Wall shear stress

(Difference between revisions)

Latest revision as of 10:21, 5 December 2012

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 parallel to the wall and $y$ is the distance to the wall.

The SI unit of wall shear stress is pascal ( $Pa$ ), which is identical to $\frac{kg}{m\cdot s^2}$ .

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-liormo
 The wall shear stress, <math>\tau_w</math>, is given by:
 :<math>\tau_w = \mu \left(\frac{\partial u}{\partial y} \right)_{y=0}</math>
-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 parallel to the wall and <math>y</math> is the distance to the wall.
+The SI unit of wall shear stress is pascal (<math>Pa</math>), which is identical to  <math>\frac{kg}{m\cdot s^2}</math>.