Law of the wall

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Latest revision as of 08:32, 7 September 2011

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

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

and close to the wall in the viscous sublayer

$u^+ = y^+$

Where:

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

In the image y is replaced with the letter n.

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Revision as of 07:58, 6 September 2011 (view source) GeeZ (Talk \| contribs) (Changed image (now is a clear png file generated from a *.svg).) ← Older edit	Latest revision as of 08:32, 7 September 2011 (view source) Peter (Talk \| contribs) m (Reverted edits by Peter (talk) to last revision by GeeZ)
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