Zobrazeno 1 - 10
of 99
pro vyhledávání: '"Lester, Daniel R."'
At all scales, porous materials stir interstitial fluids as they are advected, leading to complex distributions of matter and energy. Of particular interest is whether porous media naturally induce chaotic advection at the Darcy scale, as these stirr
Externí odkaz:
http://arxiv.org/abs/2412.05419
Many random flows, including 2D unsteady and stagnation-free 3D steady flows, exhibit non-trivial braiding of pathlines as they evolve in time or space. We show that these random flows belong to a pathline braiding \emph{universality class} that quan
Externí odkaz:
http://arxiv.org/abs/2412.05407
Global organization of 3-dimensional (3D) Lagrangian chaotic transport is difficult to infer without extensive computation. For 3D time-periodic flows with one invariant we show how constraints on deformation that arise from volume-preservation and p
Externí odkaz:
http://arxiv.org/abs/1911.04607
Autor:
Abood, Kareem, Das, Tanmoy, Lester, Daniel R., Usher, Shane P., Stickland, Anthony D., Rees, Catherine, Eshtiaghi, Nicky, Batstone, Damien J.
Publikováno v:
In Water Research 1 July 2022 219
Publikováno v:
Proceedings of the National Academy of Sciences of the United States of America, 2020 Jun . 117(24), 13359-13365.
Externí odkaz:
https://www.jstor.org/stable/26968483
Publikováno v:
Chaos 27, 043102 (2017)
Understanding the mechanisms that control three-dimensional (3D) fluid transport is central to many processes including mixing, chemical reaction and biological activity. Here a novel mechanism for 3D transport is uncovered where fluid particles are
Externí odkaz:
http://arxiv.org/abs/1608.02889
Publikováno v:
Phys. Rev. Fluids 1, 074004 (2016)
We develop a continuous time random walk (CTRW) approach for the evolution of Lagrangian velocities in steady heterogeneous flows based on a stochastic relaxation process for the streamwise particle velocities. This approach describes persistence of
Externí odkaz:
http://arxiv.org/abs/1608.02208
Publikováno v:
Chaos 26, 023113 (2016)
Mixing of materials is fundamental to many natural phenomena and engineering applications. The presence of discontinuous deformations - such as shear banding or wall slip - creates new mechanisms for mixing and transport beyond those predicted by cla
Externí odkaz:
http://arxiv.org/abs/1602.05245
Publikováno v:
Chaos 26(5), 053106 (2016)
Analysis of the periodic points of a conservative periodic dynamical system uncovers the basic kinematic structure of the transport dynamics, and identifies regions of local stability or chaos. While elliptic and hyperbolic points typically govern su
Externí odkaz:
http://arxiv.org/abs/1602.04929
Fluid deformation and strain history are central to wide range of fluid mechanical phenomena ranging from fluid mixing and particle transport to stress development in complex fluids and the formation of Lagrangian coherent structures (LCSs). To under
Externí odkaz:
http://arxiv.org/abs/1602.05273