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pro vyhledávání: '"Pereira, R. M."'
We carry out an in-depth analysis of a recently introduced vortex gas model of homogeneous and isotropic turbulence. Direct numerical simulations are used to provide a concrete physical interpretation of one of the model's constituent fields: the deg
Externí odkaz:
http://arxiv.org/abs/2312.01155
Eddy-Viscous Modeling and the Topology of Extreme Circulation Events in Three-Dimensional Turbulence
We discuss the role of particular velocity field configurations -- instantons, for short -- which are supposed to dominate the flow during the occurrence of extreme turbulent circulation events. Instanton equations, devised for the stochastic hydrody
Externí odkaz:
http://arxiv.org/abs/2206.14533
Autor:
Moriconi, L., Pereira, R. M.
Recent numerical explorations of extremely intense circulation fluctuations at high Reynolds number flows have brought to light novel aspects of turbulent intermittency. Vortex gas modeling ideas, introduced alongside such developments, have led to a
Externí odkaz:
http://arxiv.org/abs/2204.12862
Publikováno v:
Phys. Rev. E 102, 041102 (2020)
Statistical properties of circulation encode relevant information about the multi-scale structure of turbulent cascades. Recent massive computational efforts have posed challenging theoretical issues, as the dependence of circulation moments upon Rey
Externí odkaz:
http://arxiv.org/abs/2006.16725
Autor:
PEREIRA, R. M. F.
Publikováno v:
Repositório Institucional da UFESUniversidade Federal do Espírito SantoUFES.
Made available in DSpace on 2018-08-01T23:31:14Z (GMT). No. of bitstreams: 1 tese_12306_ROSE MARY FRAGA PEREIRA TESE FINAL.pdf: 1656517 bytes, checksum: 1a891befb8c918112a83fe42b27c6093 (MD5) Previous issue date: 2018-01-29
Objetiva-se analisar
Objetiva-se analisar
Externí odkaz:
http://repositorio.ufes.br/handle/10/8543
Autor:
Sosa-Correa, W., Pereira, R. M., Macêdo, A. M. S., Raposo, E. P., Salazar, D. S. P., Vasconcelos, G. L.
Publikováno v:
Phys. Rev. Fluids 4, 064602 (2019)
Skewness and non-Gaussian behavior are essential features of the distribution of short-scale velocity increments in isotropic turbulent flows. Yet, although the skewness has been generally linked to time-reversal symmetry breaking and vortex stretchi
Externí odkaz:
http://arxiv.org/abs/1812.03199
Publikováno v:
Phys. Rev. E 99, 033104 (2019)
We study the onset of intermittency in stochastic Burgers hydrodynamics, as characterized by the statistical behavior of negative velocity gradient fluctuations. The analysis is based on the response functional formalism, where specific velocity conf
Externí odkaz:
http://arxiv.org/abs/1810.09626
Publikováno v:
Physica A vol. 514, 741-757 (2019)
We perform a detailed analytical study of the Recent Fluid Deformation (RFD) model for the onset of Lagrangian intermittency, within the context of the Martin-Siggia-Rose-Janssen-de Dominicis (MSRJD) path integral formalism. The model is based, as a
Externí odkaz:
http://arxiv.org/abs/1711.06339
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