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Law of the wall

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m (Reverted edits by DrondArsit (Talk) to last version by Jola)
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In the log layer the velocity profile can be estimated with the log law:
In the log layer the velocity profile can be estimated with the log law:
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:<math>u^+ = \frac{1}{\kappa} \, ln(y^+) + C</math>
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:<math>u^+ = \frac{1}{\kappa} \, ln(y^+) + B</math>
Where:
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?''
''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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 +
[[Image:law of the wall.jpg]]
{{stub}}
{{stub}}

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?

Law of the wall.jpg


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