Von kármán's constant: Difference between revisions

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|Display title=von K&#x000e1;rm&#x000e1;n's constant
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|Meaning=(Or K&#x000e1;rm&#x000e1;n constant.) A constant ''k'' of the logarithmic [[wind profile]] in  the [[surface layer]].
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|Explanation=It characterizes the dimensionless [[wind shear]] for statically neutral conditions,  <blockquote>[[File:ams2001glos-Ve18.gif|link=|center|ams2001glos-Ve18]]</blockquote> where ''z'' is height, ''u''<sub>&#x0002a;</sub> is [[friction velocity]], and ''U'' is wind [[velocity]]. The K&#x000e1;rm&#x000e1;n constant was first  determined in [[hydrodynamics]]. Presently a value of ''k'' = 0.40 &plusmn; 0.01 is assumed. <br/>''See'' [[logarithmic velocity profile|logarithmic  velocity profile]].
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== von K&#x000e1;rm&#x000e1;n's constant ==
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<div class="definition"><div class="short_definition">(Or K&#x000e1;rm&#x000e1;n constant.) A constant ''k'' of the logarithmic [[wind profile]] in  the [[surface layer]].</div><br/> <div class="paragraph">It characterizes the dimensionless [[wind shear]] for statically neutral conditions,  <div class="display-formula"><blockquote>[[File:ams2001glos-Ve18.gif|link=|center|ams2001glos-Ve18]]</blockquote></div> where ''z'' is height, ''u''<sub>&#x0002a;</sub> is [[friction velocity]], and ''U'' is wind [[velocity]]. The K&#x000e1;rm&#x000e1;n constant was first  determined in [[hydrodynamics]]. Presently a value of ''k'' = 0.40 &plusmn; 0.01 is assumed. <br/>''See'' [[logarithmic  velocity profile]].</div><br/> </div>
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Latest revision as of 01:47, 29 March 2024

(Or Kármán constant.) A constant k of the logarithmic wind profile in the surface layer.
It characterizes the dimensionless wind shear for statically neutral conditions,
ams2001glos-Ve18
where z is height, u* is friction velocity, and U is wind velocity. The Kármán constant was first determined in hydrodynamics. Presently a value of k = 0.40 ± 0.01 is assumed.
See logarithmic velocity profile.
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