Zobrazeno 1 - 10
of 143
pro vyhledávání: '"Barkley, Dwight"'
We consider the propagation of linear gravity waves on the free surface of steady, axisymmetric flows with purely azimuthal velocity. We propose a two-dimensional set of governing equations for surface waves valid in the deep-water limit. These equat
Externí odkaz:
http://arxiv.org/abs/2405.12078
Publikováno v:
Phys. Rev. Lett. 132, 264002 (2024)
Directed percolation (DP), a universality class of continuous phase transitions, has recently been established as a possible route to turbulence in subcritical wall-bounded flows. In canonical straight pipe or planar flows, the transition occurs via
Externí odkaz:
http://arxiv.org/abs/2402.08829
A central obstacle to understanding the route to turbulence in wall-bounded flows is that the flows are composed of complex, highly fluctuating, and strongly nonlinear states. We address this challenge by deriving from the Navier-Stokes equations a s
Externí odkaz:
http://arxiv.org/abs/2309.12879
Publikováno v:
J. Fluid Mech. (2024) 997, A40
Trapped surface waves have been observed in a swimming pool trapped by, and rotating around, the cores of vortices. To investigate this effect, we have numerically studied the free-surface response of a Lamb--Oseen vortex to small perturbations. The
Externí odkaz:
http://arxiv.org/abs/2209.14011
Publikováno v:
Phys. Rev. Fluids 5, 083905 (2020)
Intermittent turbulent-laminar patterns characterize the transition to turbulence in pipe, plane Couette and plane channel flows. The time evolution of turbulent-laminar bands in plane channel flow is studied via direct numerical simulations using th
Externí odkaz:
http://arxiv.org/abs/2002.07435
Autor:
Barkley, Dwight
Publikováno v:
Proc. R. Soc. A. 476, 20200348 (2020)
The mechanism for singularity formation in an inviscid wall-bounded fluid flow is investigated. The incompressible Euler equations are numerically simulated in a cylindrical container. The flow is axisymmetric with swirl. The simulations reproduce an
Externí odkaz:
http://arxiv.org/abs/1902.05993
Autor:
Dessup, Tommy, Tuckerman, Laurette S., Wesfreid, Jose Eduardo, Barkley, Dwight, Willis, Ashley P.
Publikováno v:
Phys. Rev. Fluids 3, 123902 (2018)
The transition from Tayor vortex flow to wavy-vortex flow is revisited. The Self-Sustaining Process (SSP) of Waleffe [Phys. Fluids 9, 883-900 (1997)] proposes that a key ingredient in transition to turbulence in wall-bounded shear flows is a three-st
Externí odkaz:
http://arxiv.org/abs/1808.07253
Publikováno v:
Journal of Applied Physics 123, 065102 (2018)
A dielectric elastomer whose edges are held fixed will buckle, given sufficient applied voltage, resulting in a nontrivial out-of-plane deformation. We study this situation numerically using a nonlinear elastic model which decouples two of the princi
Externí odkaz:
http://arxiv.org/abs/1711.02602
Publikováno v:
J. Fluid Mech. 824, R1 (2017)
We examine the onset of turbulence in Waleffe flow -- the planar shear flow between stress-free boundaries driven by a sinusoidal body force. By truncating the wall-normal representation to four modes, we are able to simulate system sizes an order of
Externí odkaz:
http://arxiv.org/abs/1704.03567
Autor:
Barkley, Dwight
Publikováno v:
Proceedings: Mathematical, Physical and Engineering Sciences, 2020 Aug 01. 476(2240), 1-22.
Externí odkaz:
https://www.jstor.org/stable/27097203
