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Time-symmetry breaking in turbulent ...

Jucha, Jennifer.

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Time-symmetry breaking in turbulent multi-particle dispersion

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Time-symmetry breaking in turbulent multi-particle dispersion/ by Jennifer Jucha.
作者:	Jucha, Jennifer.
出版者:	Cham :Springer International Publishing : : 2015.,
面頁冊數:	xii, 113 p. :ill. (some col.), digital ;24 cm.
內容註:	Motivation -- Introduction and Theory -- Experimental Methods,- Two-Particle Dispersion -- Four-Particle Dispersion -- The Effect of Polymers -- Discussion and Perspectives.
Contained By:	Springer eBooks
標題:	Turbulence. -
電子資源:	http://dx.doi.org/10.1007/978-3-319-19192-8
ISBN:	9783319191928 (electronic bk.)

Time-symmetry breaking in turbulent multi-particle dispersion
Jucha, Jennifer.

Time-symmetry breaking in turbulent multi-particle dispersion[electronic resource] /by Jennifer Jucha. - Cham :Springer International Publishing :2015. - xii, 113 p. :ill. (some col.), digital ;24 cm. - Springer theses,2190-5053. - Springer theses..

Motivation -- Introduction and Theory -- Experimental Methods,- Two-Particle Dispersion -- Four-Particle Dispersion -- The Effect of Polymers -- Discussion and Perspectives.

This thesis presents experimental and theoretical investigations of the connection between the time asymmetry in the short-time evolution of particle clusters and the intrinsic irreversibility of turbulent flows due to the energy cascade. The term turbulence describes a special state of a continuous medium in which many interacting degrees of freedom are excited. One of the interesting phenomena observed in turbulent flows is their time irreversibility. When milk is stirred into coffee, for example, highly complex and interwoven structures are produced, making the mixing process irreversible. This behavior can be analyzed in more detail by studying the dispersion of particle clusters. Previous experimental and numerical studies on the time asymmetry in two-particle dispersion indicate that particles separate faster backwards than forwards in time, but no conclusive explanation has yet been provided. In this thesis, an experimental study on the short-time behavior of two- and four-particle dispersion in a turbulent water flow between two counter-rotating propellers is presented. A brief but rigorous theoretical analysis reveals that the observed time irreversibility is closely linked to the turbulence energy cascade. Additionally, it is demonstrated experimentally that the addition of minute amounts of polymers to the flow has a significant impact on multi-particle dispersion due to an alteration of the energy cascade.

ISBN: 9783319191928 (electronic bk.)

Standard No.: 10.1007/978-3-319-19192-8doiSubjects--Topical Terms:

594108
Turbulence.

LC Class. No.: TA357.5.T87

Dewey Class. No.: 532.0527

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