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pro vyhledávání: '"Gatti,Davide"'
We address the Reynolds-number dependence of the turbulent skin-friction drag reduction induced by streamwise-travelling waves of spanwise wall oscillations. The study relies on direct numerical simulations of drag-reduced flows in a plane open chann
Externí odkaz:
http://arxiv.org/abs/2409.07230
The ability of streamwise-travelling waves of spanwise velocity to reduce the turbulent skin friction drag is assessed in the compressible regime. Direct numerical simulations are carried out to compare drag reduction in subsonic, transonic and super
Externí odkaz:
http://arxiv.org/abs/2312.09929
Autor:
Elkhazraji, Ali, Shakfa, Mohammad Khaled, Lamperti, Marco, Hakimov, Khaiyom, Djebbi, Khalil, Gotti, Riccardo, Gatti, Davide, Marangoni, Marco, Farooq, Aamir
We report an approach for high-resolution spectroscopy using a widely tunable laser emitting in the molecular fingerprint region. The laser is based on difference-frequency generation (DFG) in a nonlinear orientation-patterned GaAs crystal. The signa
Externí odkaz:
http://arxiv.org/abs/2212.09089
The effect of streamwise-traveling waves of spanwise wall velocity (StTW) on the quasi-streamwise vortices (QSV) populating the near-wall region of turbulent channels is studied via a conditional averaging technique applied to flow snapshots obtained
Externí odkaz:
http://arxiv.org/abs/2208.09955
The separating and reattaching turbulent flow past a rectangular cylinder is studied to describe how small and large scales contribute to the sustaining mechanism of the velocity fluctuations. The work is based on the Anisotropic Generalised Kolmogor
Externí odkaz:
http://arxiv.org/abs/2207.05799
Autor:
Quadrio, Maurizio, Chiarini, Alessandro, Banchetti, Jacopo, Gatti, Davide, Memmolo, Antonio, Pirozzoli, Sergio
Flow control for turbulent skin-friction drag reduction is applied to a transonic airfoil to improve its aerodynamic performance. The study is based on direct numerical simulations (with up to 1.8 billions cells) of the compressible turbulent flow ar
Externí odkaz:
http://arxiv.org/abs/2204.12172
The interaction between small- and large-scale structures, and the coexisting bottom-up and top-down processes are studied in a turbulent plane Couette flow, where space-filling longitudinal rolls appear at relatively low values of the Reynolds numbe
Externí odkaz:
http://arxiv.org/abs/2109.11183
Publikováno v:
J. Fluid Mech. 924 (2021) A25
Turbulent plane Poiseuille and Couette flows share the same geometry, but produce their flow rate owing to different external drivers, pressure gradient and shear respectively. By looking at integral energy fluxes, we pose and answer the question of
Externí odkaz:
http://arxiv.org/abs/2106.14495
The application of drag-control strategies on canonical wall-bounded turbulence, such as periodic channel and zero- or adverse-pressure-gradient boundary layers, raises the question of how to describe control effects consistently for different refere
Externí odkaz:
http://arxiv.org/abs/2106.03547
Autor:
Adami, Giovanni, Gatti, Davide, Rossini, Maurizio, Giollo, Alessandro, Gatti, Matteo, Bertoldo, Francesco, Bertoldo, Eugenia, Mudano, Amy S., Saag, Kenneth G., Viapiana, Ombretta, Fassio, Angelo
Publikováno v:
In Bone February 2024 179
