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Kinetic helicity de...
Kinetic helicity decay in linearly forced turbulence
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- Brandenburg, Axel (author)
- Stockholms universitet,Nordiska institutet för teoretisk fysik (Nordita),Institutionen för astronomi
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Petrosyan, A. (author)
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(creator_code:org_t)
- 2012-04-11
- 2012
- English.
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In: Astronomical Notes - Astronomische Nachrichten. - : Wiley. - 0004-6337 .- 1521-3994. ; 333:3, s. 195-201
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Abstract
Subject headings
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- The decay of kinetic helicity is studied in numerical models of forced turbulence using either an externally imposed forcing function as an inhomogeneous term in the equations or, alternatively, a term linear in the velocity giving rise to a linear instability. The externally imposed forcing function injects energy at the largest scales, giving rise to a turbulent inertial range with nearly constant energy flux while for linearly forced turbulence the spectral energy is maximum near the dissipation wavenumber. Kinetic helicity is injected once a statistically steady state is reached, but it is found to decay on a turbulent time scale regardless of the nature of the forcing and the value of the Reynolds number
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- hydrodynamics
- stars: interiors
- turbulence
Publication and Content Type
- ref (subject category)
- art (subject category)
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