Large-scale effects on the decay of rotating helical and non-helical turbulence
Turbulent mixing in geophysics is often affected by the presence of rotation, which renders the flow anisotropic at large scales. Helicity (correlation between the velocity and its curl) has relevance for atmospheric and astrophysical flows and can also affect mixing. In this paper, decaying three-d...
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| Formato: | Acta de conferencia Capítulo de libro |
| Lenguaje: | Inglés |
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2010
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| Acceso en línea: | Registro en Scopus DOI Handle Registro en la Biblioteca Digital |
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| LEADER | 10389caa a22011177a 4500 | ||
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| 001 | PAPER-7418 | ||
| 003 | AR-BaUEN | ||
| 005 | 20230518203710.0 | ||
| 008 | 190411s2010 xx ||||fo|||| 10| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-79551583529 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 030 | |a PHSTE | ||
| 100 | 1 | |a Teitelbaum, T. | |
| 245 | 1 | 0 | |a Large-scale effects on the decay of rotating helical and non-helical turbulence |
| 260 | |c 2010 | ||
| 270 | 1 | 0 | |m Teitelbaum, T.; Departamento de Fí Sica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires and CONICET, 1428 Buenos Aires, Argentina; email: teitelbaum@df.uba.ar |
| 506 | |2 openaire |e Política editorial | ||
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| 504 | |a Mininni, P.D., Pouquet, A., Helicity cascades in rotating turbulence (2009) Phys. Rev., 79 (2), p. 026304A4 - International Centre for Theoretical Physics (ICTP); National Science Foundation (NSF); Air Force Office of Scientific Research (AFOSR); Eur. Off. Aerosp. Res. Dev. (EOARD) AFOSR; Department of Energy (DOE) | ||
| 520 | 3 | |a Turbulent mixing in geophysics is often affected by the presence of rotation, which renders the flow anisotropic at large scales. Helicity (correlation between the velocity and its curl) has relevance for atmospheric and astrophysical flows and can also affect mixing. In this paper, decaying three-dimensional (3D) turbulence is studied via direct numerical simulations (DNS) for an isotropic non-rotating flow and for rotating flows with and without helicity. We analyze the cases of moderate Rossby number and large Reynolds number, focusing on the behavior of the energy spectrum at large scales and studying its effect on the time evolution of the energy and integral scales for E(k)∼k4 initial conditions. In the non-rotating case, we observe the classical energy decay rate t-10/7 and a growth of the integral length proportional to t2/7 in agreement with the prediction obtained assuming conservation of the Loitsyanski integral. In the presence of rotation we observe a decoupling in the decay of the modes perpendicular to the rotation axis from the remaining 3D modes. These slow modes show a behavior similar to that found in two-dimensional (2D) turbulence, whereas the 3D modes decay as in the isotropic case. We phenomenologically explain the decay considering integral conserved quantities that depend on the large-scale anisotropic spectrum. The decoupling of modes is also observed for a flow with a net amount of helicity. In this case, the 3D modes decay as an isotropic fluid with a constant, constrained integral length and the 2D modes decay as a constrained rotating fluid with maximum helicity. © 2010 The Royal Swedish Academy of Sciences. |l eng | |
| 593 | |a Departamento de Fí Sica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires and CONICET, 1428 Buenos Aires, Argentina | ||
| 593 | |a NCAR, PO Box 3000, Boulder, CO 80307-3000, United States | ||
| 690 | 1 | 0 | |a ANISOTROPIC SPECTRA |
| 690 | 1 | 0 | |a ASTROPHYSICAL FLOWS |
| 690 | 1 | 0 | |a CONSERVED QUANTITY |
| 690 | 1 | 0 | |a ENERGY DECAY RATES |
| 690 | 1 | 0 | |a ENERGY SPECTRA |
| 690 | 1 | 0 | |a HELICAL TURBULENCE |
| 690 | 1 | 0 | |a HELICITIES |
| 690 | 1 | 0 | |a INITIAL CONDITIONS |
| 690 | 1 | 0 | |a ISOTROPIC FLUIDS |
| 690 | 1 | 0 | |a LARGE-SCALE EFFECTS |
| 690 | 1 | 0 | |a ROSSBY NUMBERS |
| 690 | 1 | 0 | |a ROTATING FLOW |
| 690 | 1 | 0 | |a ROTATING FLUIDS |
| 690 | 1 | 0 | |a ROTATION AXIS |
| 690 | 1 | 0 | |a SLOW MODE |
| 690 | 1 | 0 | |a THREE-DIMENSIONAL (3D) |
| 690 | 1 | 0 | |a TIME EVOLUTIONS |
| 690 | 1 | 0 | |a TURBULENT MIXING |
| 690 | 1 | 0 | |a TWO-DIMENSIONAL (2D) TURBULENCE |
| 690 | 1 | 0 | |a ANISOTROPY |
| 690 | 1 | 0 | |a MIXING |
| 690 | 1 | 0 | |a REYNOLDS NUMBER |
| 690 | 1 | 0 | |a ROTATION |
| 690 | 1 | 0 | |a ROTATIONAL FLOW |
| 690 | 1 | 0 | |a SPECTROSCOPY |
| 690 | 1 | 0 | |a THREE DIMENSIONAL |
| 690 | 1 | 0 | |a TURBULENCE |
| 690 | 1 | 0 | |a TURBULENT FLOW |
| 690 | 1 | 0 | |a DECAY (ORGANIC) |
| 700 | 1 | |a Mininni, P.D. | |
| 711 | 2 | |c Trieste |d 27 July 2009 through 7 August 2009 |g Código de la conferencia: 83718 | |
| 773 | 0 | |d 2010 |g v. T142 |p Phys Scr T |n Physica Scripta T |x 02811847 |t 2nd International Conference and Advanced School on Turbulent Mixing and Beyond, TMB-2009 | |
| 856 | 4 | 1 | |u https://www.scopus.com/inward/record.uri?eid=2-s2.0-79551583529&doi=10.1088%2f0031-8949%2f2010%2fT142%2f014003&partnerID=40&md5=ba229e47e6a2a41b7a2fe3dee594e3ed |y Registro en Scopus |
| 856 | 4 | 0 | |u https://doi.org/10.1088/0031-8949/2010/T142/014003 |y DOI |
| 856 | 4 | 0 | |u https://hdl.handle.net/20.500.12110/paper_02811847_vT142_n_p_Teitelbaum |y Handle |
| 856 | 4 | 0 | |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02811847_vT142_n_p_Teitelbaum |y Registro en la Biblioteca Digital |
| 961 | |a paper_02811847_vT142_n_p_Teitelbaum |b paper |c PE | ||
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