Two-Dimensional Decaying Elastoinertial Turbulence

We numerically simulate two-dimensional, decaying elastoinertial turbulence using the finitely extensible, nonlinear, elastic spring model. We vary the polymer concentration over seven decades, and observe two turbulent elastoinertial regimes. In the weakly coupled regime only the small scale struct...

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Bibliographic Details
Published in:Physical review letters 2019-10, Vol.123 (14), p.144502-144502, Article 144502
Main Author: Gillissen, J. J. J.
Format: Article
Language:English
Subjects:
Computer simulation
Decay rate
Drag reduction
Polymers
Shock waves
Turbulence
Two dimensional models
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Summary:We numerically simulate two-dimensional, decaying elastoinertial turbulence using the finitely extensible, nonlinear, elastic spring model. We vary the polymer concentration over seven decades, and observe two turbulent elastoinertial regimes. In the weakly coupled regime only the small scale structures change, while in the strongly coupled regime all structures change. This regime is dominated by elastoinertial shock waves with drag reduction properties; i.e., the energy decay rate decreases when the polymer concentration increases.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.123.144502