6 papers
A Mass-transfer Particle-tracking Method for Simulating Transport with Discontinuous Diffusion Coefficients
Michael J. Schmidt, Nicholas B. Engdahl, Stephen D. Pankavich +1
The problem of a spatially discontinuous diffusion coefficient () is one that may be encountered in hydrogeologic systems due to natural geological features or as…
Reactive Particle-tracking Solutions to a Benchmark Problem on Heavy Metal Cycling in Lake Sediments
Michael J. Schmidt, Stephen D. Pankavich, Alexis Navarre-Sitchler +3
Geochemical systems are known to exhibit highly variable spatiotemporal behavior. This may be observed both in non-smooth concentration curves in space for a single sampling time a…
Numerical Equivalence Between SPH and Probabilistic Mass Transfer Methods for Lagrangian Simulation of Dispersion
Guillem Sole-Mari, Michael J. Schmidt, Stephen D. Pankavich +1
Several Lagrangian methodologies have been proposed in recent years to simulate advection-dispersion of solutes in fluids as a mass exchange between numerical particles carrying th…
Accelerating and parallelizing Lagrangian simulations of mixing-limited reactive transport
Nicholas B. Engdahl, Michael J. Schmidt, David A. Benson
Recent advances in random-walk particle-tracking have enabled direct simulation of mixing and reactions on particles by allowing the particles to interact with each other using a m…
A Lagrangian Method for Reactive Transport with Solid/Aqueous Chemical Phase Interaction
Michael J. Schmidt, Stephen D. Pankavich, Alexis Navarre-Sitchler +1
A significant drawback of Lagrangian (particle-tracking) reactive transport models has been their inability to properly simulate interactions between solid and liquid chemical phas…
On the accuracy of simulating mixing by random-walk particle-based mass-transfer algorithms
Michael J. Schmidt, Stephen D. Pankavich, David A. Benson
Several algorithms have been used for mass transfer between particles undergoing advective and macro-dispersive random walks. The mass transfer between particles is required for ge…