Zobrazeno 1 - 10
of 149
pro vyhledávání: '"Guido Boffetta"'
Autor:
Guido Boffetta
Publikováno v:
Atmosphere, Vol 14, Iss 11, p 1688 (2023)
The transition from two-dimensional to three-dimensional turbulence is a fascinating problem which finds applications in the study of geophysical flows. This paper briefly reviews the research in this field with emphasis on the role of rotation and s
Externí odkaz:
https://doaj.org/article/9f082831335244138af24daec0fca98e
Publikováno v:
Physical Review X, Vol 4, Iss 4, p 041006 (2014)
In statistically homogeneous turbulent flows, pressure forces provide the main mechanism to redistribute kinetic energy among fluid elements, without net contribution to the overall energy budget. This holds true in both two-dimensional (2D) and thre
Externí odkaz:
https://doaj.org/article/0e8583be208d4618a44b7871561ee15e
Publikováno v:
Physical Review Fluids. 7
We study the dynamics of a dilute solution of rigid rodlike polymers in a viscous fluid at low Reynolds number by means of numerical simulations of a simple rheological model. We show that the rotational dynamics of polymers destabilizes the laminar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7deb92a90664a27bfb5475f88c5823a9
https://doi.org/10.1103/physrevfluids.7.083301
https://doi.org/10.1103/physrevfluids.7.083301
Autor:
Filippo De Lillo, Matteo Borgnino, Guido Boffetta, Kristian Gustafsson, Bernhard Mehlig, Massimo Cencini
Many phytoplankters are able to swim, and are thus not passively transported by the flow. Although usually weak, ocean turbulence can affect the motion of one-celled organisms in nontrivial ways. It is known that an ellipsoidal body can be rotated by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::37ec3fab5d75caf8b55911dca9526c82
https://doi.org/10.5194/egusphere-egu22-13293
https://doi.org/10.5194/egusphere-egu22-13293
Autor:
Guido Boffetta, Stefano Musacchio
Publikováno v:
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 380
We study the effects of dimensional confinement on the evolution of incompressible Rayleigh–Taylor mixing both in a bulk flow and in porous media by means of numerical simulations of the transport equations. In both cases, the confinement to two-di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d6577cf590ac031b79a63661bec43f92
https://doi.org/10.1098/rsta.2021.0084
https://doi.org/10.1098/rsta.2021.0084
Autor:
Jacco H. Snoeijer, Brad Rubin, Roberto Zenit, Howard A. Stone, Michael Brenner, Petros Koumoutsakos, Sanjiva K. Lele, Eric S. G. Shaqfeh, Bruce R. Sutherland, Guowei He, David Quéré, Nicolas Hadjiconstantinou, Eckart Meiburg, Emmanuel Villermaux, Eric Lauga, Peter J. Schmid, Cecile Cottin-Bizonne, Guido Boffetta, Beverley McKeon, Luminita Danaila
Publikováno v:
Physical review fluids, 6(12):120001. American Physical Society
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f8c5b529c8c674cf1f140f5d49678374
https://doi.org/10.1103/physrevfluids.6.120001
https://doi.org/10.1103/physrevfluids.6.120001
Publikováno v:
European Journal of Mechanics - B/Fluids. 74:260-264
We present a technique for measuring the two-dimensional surface water wave elevation both in space and time based on the low-cost Microsoft Kinect sensor. We discuss the capabilities of the system and a method for its calibration. We illustrate the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8b3c05e857a634ea9b31535142e246ea
https://doi.org/10.1016/j.euromechflu.2018.08.017
https://doi.org/10.1016/j.euromechflu.2018.08.017
The effect of geometrical confinement on Rayleigh-Taylor mixing in porous media is investigated by means of numerical simulations. We find a dimensional transition from three-dimensional to two-dimensional phenomenology when the density plumes become
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f838a6ef50cfe03d62d94b3a012805fe
http://hdl.handle.net/2318/1802422
http://hdl.handle.net/2318/1802422
We report of a series of laboratory experiments and numerical simulations of freely-decaying rotating turbulent flows confined in domains with variable height. We show that the vertical confinement has important effects on the formation of large-scal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::571c24f1bc1c40458b2c142ac4c38815
http://hdl.handle.net/2318/1765316
http://hdl.handle.net/2318/1765316
Publikováno v:
Physical review fluids (Online) 5 (2020). doi:10.1103/PhysRevFluids.5.094302
info:cnr-pdr/source/autori:Sozza A.; Cencini M.; Musacchio S.; Boffetta G./titolo:Drag enhancement in a dusty Kolmogorov flow/doi:10.1103%2FPhysRevFluids.5.094302/rivista:Physical review fluids (Online)/anno:2020/pagina_da:/pagina_a:/intervallo_pagine:/volume:5
info:cnr-pdr/source/autori:Sozza A.; Cencini M.; Musacchio S.; Boffetta G./titolo:Drag enhancement in a dusty Kolmogorov flow/doi:10.1103%2FPhysRevFluids.5.094302/rivista:Physical review fluids (Online)/anno:2020/pagina_da:/pagina_a:/intervallo_pagine:/volume:5
Particles suspended in a fluid exert feedback forces that can significantly impact the flow, altering the turbulent drag and velocity fluctuations. We study flow modulation induced by particles heavier than the carrier fluid in the framework of an Eu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b0bc3ae138eedff052e591e364a895b5
http://arxiv.org/abs/2006.09331
http://arxiv.org/abs/2006.09331