26 citations · 73 across the 7 of their papers we have counts for
7 papers
A Unified Theory for Chaotic Mixing in Porous Media: from Pore Networks to Granular Systems
Daniel Lester, Joris Heyman, Yves Meheust +1
Recent studies have revealed the central role of chaotic stretching and folding at the pore scale in controlling mixing within porous media, whether the solid phase is discrete (as…
Is Chaotic Advection Inherent to Heterogeneous Darcy Flow?
Daniel R. Lester, Michael G. Trefry, Guy Metcalfe +1
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…
Linking Dispersion and Stirring in Randomly Braiding Flows
Daniel R. Lester, Michael G. Trefry, Guy Metcalfe
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 f…
When Do Complex Transport Dynamics Arise in Natural Groundwater Systems?
J. Wu, D. R. Lester, M. G. Trefry +1
In a recent paper (Trefry et al., 2019) we showed that the interplay of aquifer heterogeneity and poroelasticity can produce complex transport in tidally forced aquifers, with sign…
Chaotic Advection at the Pore Scale: Mechanisms, Upscaling and Implications for Macroscopic Transport
D. R. Lester, M. G. Trefry, Guy Metcalfe
The macroscopic spreading and mixing of solute plumes in saturated porous media is ultimately controlled by processes operating at the pore scale. Whilst the conventional picture o…
Mixing of discontinuously deforming media
Lachlan D. Smith, Murray Rudman, Daniel R. Lester +1
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…
Bifurcations and degenerate periodic points in a three dimensional chaotic fluid flow
Lachlan D. Smith, Murray Rudman, Daniel R. Lester +1
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 stabil…