K-ε closure: Difference between revisions
From Glossary of Meteorology
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<div class="definition"><div class="short_definition">A type of one-and-a-half-order [[turbulence closure]] that retains forecast equations for mean (first-order [[statistics]]) variables such as [[potential temperature]] and [[wind]] components, and also retains equations for [[variances]] ([[turbulence kinetic energy]] and [[temperature]] variance, symbolized by ''k'') and for [[molecular dissipation]] or destruction of variances (symbolized by ε).</div><br/> <div class="paragraph"><br/>''Compare'' [[first-order closure]], [[K-theory]], [[second-order closure]], [[nonlocal closure]], [[Reynolds averaging]], [[closure assumptions]].</div><br/> </div> | <div class="definition"><div class="short_definition">A type of one-and-a-half-order [[turbulence closure]] that retains forecast equations for mean (first-order [[statistics]]) variables such as [[potential temperature]] and [[wind]] components, and also retains equations for [[variances]] ([[turbulence kinetic energy]] and [[temperature]] variance, symbolized by ''k'') and for [[molecular dissipation]] or destruction of variances (symbolized by ε).</div><br/> <div class="paragraph"><br/>''Compare'' [[first-order closure]], [[K-theory]], [[second-order closure]], [[nonlocal closure]], [[Reynolds averaging|Reynolds averaging]], [[closure assumptions]].</div><br/> </div> | ||
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Latest revision as of 16:16, 25 April 2012
k–ε closure
A type of one-and-a-half-order turbulence closure that retains forecast equations for mean (first-order statistics) variables such as potential temperature and wind components, and also retains equations for variances (turbulence kinetic energy and temperature variance, symbolized by k) and for molecular dissipation or destruction of variances (symbolized by ε).
Compare first-order closure, K-theory, second-order closure, nonlocal closure, Reynolds averaging, closure assumptions.
