Similarity without diffusion: shear turbulent layer damped by buoyancy

Article

Strunin, D. V.. 2006. "Similarity without diffusion: shear turbulent layer damped by buoyancy." Journal of Engineering Mathematics. 54 (3), pp. 211-224. https://doi.org/10.1007/s10665-005-9010-5
Article Title

Similarity without diffusion: shear turbulent layer damped by buoyancy

ERA Journal ID239
Article CategoryArticle
Authors
AuthorStrunin, D. V.
Journal TitleJournal of Engineering Mathematics
Journal Citation54 (3), pp. 211-224
Number of Pages14
Year2006
Place of PublicationNetherlands
ISSN0022-0833
1573-2703
Digital Object Identifier (DOI)https://doi.org/10.1007/s10665-005-9010-5
Web Address (URL)http://www.springerlink.com/content/yv03v3325712t720/fulltext.pdf
Abstract

[Abstract]: The evolution of a turbulent layer generated by velocity shear between two half-spaces of fluid and suppressed
by a stable density difference is studied. Initially the layer expands, then shrinks to a point in finite time.
By the end of the expansion stage the turbulent diffusion decays to a small value compared to the shear and
buoyancy inputs in the turbulent energy balance. During the shrinking stage the diffusion decays even further by
comparison. It is shown that at this stage the profiles of the turbulent energy, velocity and buoyancy become
virtually self-similar. The differences between this case and the more usual types of self-similarity, where diffusion
plays significant role, are discussed.

Keywordsbuoyancy; shear; similarity; turbulence
ANZSRC Field of Research 2020401204. Computational methods in fluid flow, heat and mass transfer (incl. computational fluid dynamics)
490109. Theoretical and applied mechanics
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Byline AffiliationsDepartment of Mathematics and Computing
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