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Teitelbaum T, Mininni PD. Effect of helicity and rotation on the free decay of turbulent flows. Phys Rev Lett. 2009;103(1):014501doi: 10.1103/PhysRevLett.103.014501.
Teitelbaum, T., & Mininni, P. D. (2009). Effect of helicity and rotation on the free decay of turbulent flows. Physical review letters, 103(1), 014501. https://doi.org/10.1103/PhysRevLett.103.014501
Teitelbaum, T, and Mininni, P D. "Effect of helicity and rotation on the free decay of turbulent flows." Physical review letters vol. 103,1 (2009): 014501. doi: https://doi.org/10.1103/PhysRevLett.103.014501
Teitelbaum T, Mininni PD. Effect of helicity and rotation on the free decay of turbulent flows. Phys Rev Lett. 2009 Jul 03;103(1):014501. doi: 10.1103/PhysRevLett.103.014501. Epub 2009 Jun 29. PMID: 19659150.
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Phys Rev Lett. 2009 Jul 03;103(1):014501. doi: 10.1103/PhysRevLett.103.014501. Epub 2009 Jun 29.

Effect of helicity and rotation on the free decay of turbulent flows.

Physical review letters

T Teitelbaum, P D Mininni

Affiliations

  1. Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires and CONICET, Ciudad Universitaria, 1428 Buenos Aires, Argentina.

PMID: 19659150 DOI: 10.1103/PhysRevLett.103.014501

Abstract

The self-similar decay of energy in a turbulent flow is studied in direct numerical simulations with and without rotation. Two initial conditions are considered: one nonhelical (mirror symmetric) and one with maximal helicity. While in the absence of rotation the energy in the helical and nonhelical cases decays with the same rate, in rotating flows the helicity content has a major impact on the decay rate. These differences are associated with differences in the energy and helicity cascades when rotation is present. The properties of the structures in the flow at late times are also discussed.

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