# Wall shear stress

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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>. |

## Revision as of 08:22, 22 November 2011

The wall shear stress, , is given by:

Where is the dynamic viscosity, is the flow velocity parallell to the wall and is the distance to the wall.

The SI unit of the kinematic viscosity is or .