Law of the wall

(Difference between revisions)

Revision as of 13:22, 18 June 2010

In the log layer the velocity profile can be estimated with the log law:

$u^+ = \frac{1}{\kappa} \, ln(y^+) + B$

Where:

$u^+$	Dimensionless velocity
$y^+$	Dimensionless wall distance
$\kappa$	von Karman's constant ( $\approx 0.41$ )
$C$	Constant ( $\approx 5.1$ )

We should have a lin-log plot here of a typical turbulent boundary layer to illustrate where the log-law is valid, anyone have one handy?

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 In the log layer the velocity profile can be estimated with the log law:
-:<math>u^+ = \frac{1}{\kappa} \, ln(y^+) + C</math>
+:<math>u^+ = \frac{1}{\kappa} \, ln(y^+) + B</math>
 Where:
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 ''We should have a lin-log plot here of a typical turbulent boundary layer to illustrate where the log-law is valid, anyone have one handy?''
+[[Image:law of the wall.jpg]]
 {{stub}}