Fractional calculus has been used to model various hydrologic processes for 15 years. Yet,
there are still major gaps between real-world hydrologic dynamics and fractional-order …

Mixing is the operation by which a system evolves under stirring from one state of simplicity—
the initial segregation of the constituents—to another state of simplicity—their complete …

This review provides an overview of concepts and approaches for the quantification of
passive, non-reactive solute mixing in steady uniform porous media flows across scales …

Random walk (RW) methods are recurring Monte Carlo methods used to model convective
and diffusive transport in complex heterogeneous media. Many applications can be found …

Using index matching and particle tracking, we measure the three-dimensional velocity field
in an isotropic porous medium composed of randomly packed solid spheres. This high …

The interplay between mixing and reactive processes plays a pivotal role in a range of
biogeochemical processes controlling the transport, transformation and turnover of chemical …

The macroscopic properties of fluid flow and transport through porous media are a direct
consequence of the underlying pore structure. However, precise relations that characterize …

Turbulent flows have been used for millennia to mix solutes; a familiar example is stirring
cream into coffee. However, many energy, environmental, and industrial processes rely on …

Fluid flow in porous media drives the transport, mixing, and reaction of molecules, particles,
and microorganisms across a wide spectrum of natural and industrial processes. Current …

The dynamics of solute dispersion and mixing in unsaturated flows is analyzed from
photobleaching experiments in two‐dimensional porous micromodels. This technique …