Zobrazeno 1 - 10
of 64
pro vyhledávání: '"Beaume, Cédric"'
Neural networks have proven to be remarkably successful for a wide range of complicated tasks, from image recognition and object detection to speech recognition and machine translation. One of their successes is the skill in prediction of future dyna
Externí odkaz:
http://arxiv.org/abs/2111.06783
The nonlinear robustness of laminar plane Couette flow is considered under the action of in-phase spanwise wall oscillations by computing properties of the edge of chaos, i.e., the boundary of its basin of attraction. Three measures are used to quant
Externí odkaz:
http://arxiv.org/abs/2108.07629
Publikováno v:
J. Fluid Mech. 895 (2020) A16
Transition to turbulence dramatically alters the properties of fluid flows. In most canonical shear flows, the laminar flow is linearly stable and a finite-amplitude perturbation is necessary to trigger transition. Controlling transition to turbulenc
Externí odkaz:
http://arxiv.org/abs/1908.03050
Autor:
Lasser, Jana, Nield, Joanna M., Ernst, Marcel, Karius, Volker, Wiggs, Giles F. S., Threadgold, Matthew R., Beaume, Cédric, Goehring, Lucas
Publikováno v:
Phys. Rev. X 13, 011025 (2023)
From fairy circles to patterned ground and columnar joints, natural patterns spontaneously appear in many complex geophysical settings. Here, we investigate the origins of polygonally patterned crusts of salt playa and salt pans. These beautifully re
Externí odkaz:
http://arxiv.org/abs/1902.03600
Unsteady spatially localized states such as puffs, slugs or spots play an important role in transition to turbulence. In plane Couette flow, steady versions of these states are found on two intertwined solution branches describing homoclinic snaking
Externí odkaz:
http://arxiv.org/abs/1806.10097
Autor:
Gvalani, Rishabh, Beaume, Cédric
Spatially localized states play an important role in transition to turbulence in shear flows (Kawahara, Uhlmann & van Veen, Annu. Rev. Fluid Mech. 44, 203 (2012)). Despite the fact that some of them are attractors on the separatrix between laminar an
Externí odkaz:
http://arxiv.org/abs/1604.04355
Publikováno v:
Phys. Rev. E 92(6), 062914 (2015)
The Adler equation with time-periodic frequency modulation is studied. A series of resonances between the period of the frequency modulation and the time scale for the generation of a phase slip is identified. The resulting parameter space structure
Externí odkaz:
http://arxiv.org/abs/1509.03582
The generalized Swift--Hohenberg equation with a quadratic-cubic nonlinearity is used to study the persistence and decay of localized patterns in the presence of time-periodic parametric forcing. A novel resonance phenomenon between the forcing perio
Externí odkaz:
http://arxiv.org/abs/1411.1513
Publikováno v:
Phys. Rev. Lett. 114(3), 034102 (2015)
The theory of stationary spatially localized patterns in dissipative systems driven by time-independent forcing is well developed. With time-periodic forcing related but time-dependent structures may result. These may consist of breathing localized p
Externí odkaz:
http://arxiv.org/abs/1408.1740
Exact coherent states of a linearly stable, plane parallel shear flow confined between stationary stress-free walls and driven by a sinusoidal body force (a flow first introduced by F. Waleffe, Phys. Fluids 9, 883 (1997)) are computed using equations
Externí odkaz:
http://arxiv.org/abs/1407.2980