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pro vyhledávání: '"Cossu, Carlo"'
Autor:
Cossu, Carlo
The influence of stable and unstable stratification on the amplification of coherent structures in turbulent channel flows is investigated by computing the linear response to stochastic forcing. The responses to momentum and thermal forcing are consi
Externí odkaz:
http://arxiv.org/abs/2304.07032
Autor:
Cossu, Carlo Andrea1 (AUTHOR) ca.cossu@tuks.co.za, Ochai, Sunday Ochonu1,2,3 (AUTHOR), Troskie, Milana1 (AUTHOR), Hartmann, Axel4 (AUTHOR), Godfroid, Jacques5 (AUTHOR), de Klerk, Lin-Mari6 (AUTHOR), Turner, Wendy7 (AUTHOR), Kamath, Pauline8,9 (AUTHOR), van Schalkwyk, Ockert Louis1,6,10 (AUTHOR), Cassini, Rudi11 (AUTHOR), Bhoora, Raksha1 (AUTHOR), van Heerden, Henriette1 (AUTHOR), Chen, Nan-Hua (AUTHOR) chnhlh@126.com
Publikováno v:
Transboundary & Emerging Diseases. 12/12/2024, Vol. 2024, p1-17. 17p.
Publikováno v:
In Ocean Engineering 15 December 2024 314 Part 1
Autor:
Cossu, Carlo
Wake redirection is a promising approach designed to mitigate turbine-wake interactions which have a negative impact on the performance and lifetime of wind farms. It has recently been found that substantial power gains can be obtained by tilting the
Externí odkaz:
http://arxiv.org/abs/2009.13901
Autor:
Cossu, Carlo
Wind turbine wakes negatively impact downwind turbines in wind farms reducing their global efficiency. The reduction of wake-turbine interactions by actuating control on yaw angles and induction factors is an active area of research. In this study, t
Externí odkaz:
http://arxiv.org/abs/2007.01617
Large-scale motions, also known as superstructures, are dynamically relevant coherent structures in a wall-bounded turbulent flow, that span the entire domain in wall-normal direction and significantly contribute to the global energy and momentum tra
Externí odkaz:
http://arxiv.org/abs/2004.08862
Publikováno v:
Journal of Fluid Mechanics, 867, pp. 969-984 (2019)
The ability of linear stochastic response analysis to estimate coherent motions is investigated in turbulent channel flow at friction Reynolds number Re$_\tau$ = 1007. The analysis is performed for spatial scales characteristic of buffer-layer and la
Externí odkaz:
http://arxiv.org/abs/1901.04356
Travelling-wave solutions are shown to bifurcate from relative periodic orbits in plane Poiseuille flow at Re = 2000 in a saddle-node infinite period bifurcation. These solutions consist in self-sustaining sinuous quasi-streamwise streaks and quasi-
Externí odkaz:
http://arxiv.org/abs/1601.01227
Large-scale motions in wall-bounded turbulent flows are frequently interpreted as resulting from an aggregation process of smaller-scale structures. Here, we explore the alternative possibility that such large-scale motions are themselves self-sustai
Externí odkaz:
http://arxiv.org/abs/1509.04434
Autor:
Cossu, Carlo
Global and local absolute instabilities of 2D wakes are known to be stabilized by spanwise periodic modulations of the wake profile. The present study shows that this stabilizing effect is of general nature and can be mimicked by enforcing spanwise p
Externí odkaz:
http://arxiv.org/abs/1404.3191