33 citations · 102 across the 7 of their papers we have counts for
7 papers
The Rheology of Granular Mixtures with Varying Size, Density, Particle Friction and Flow Geometry
Eric C. P Breard, Luke Fullard, Josef Dufek
Employing the discrete element method, we study the rheology of dense granular media mixtures, varying in size, density, and frictional properties of particles, across a spectrum f…
A generalized Townsend's theory for Paschen curves in planar, cylindrical, and spherical geometries
Jeremy A. Riousset, Joshua Méndez Harper, Josef Dufek +3
In this work, we focus on plasma discharges produced between two electrodes with a high potential difference, resulting in the ionization of the neutral particles supporting a curr…
Aeolian sediment transport on Io from lava-frost interactions
George D. McDonald, Joshua Méndez Harper, Lujendra Ojha +4
Surface modification on Jupiter's volcanically active moon, Io, has to date been attributed almost exclusively to lava emplacement and volcanic plume deposits. Here we demonstrate…
Charge injection into the atmosphere by explosive volcanic eruptions through triboelectrification and fragmentation charging
Joshua Méndez Harper, Corrado Cimarelli, Valeria Cigala +2
Volcanic eruptions are associated with a wide range of electrostatic effects. Increasing evidence suggests that high-altitude discharges (lightning) in maturing plumes are driven b…
Detection of spark discharges in an agitated Mars dust simulant isolated from foreign surfaces
Joshua Méndez Harper, Josef Dufek, George McDonald
Numerous laboratory experiments, starting in the Viking Lander era, have reported that frictional interactions between Martian analog dust grains can catalyze electrostatic process…
Microphysical effects of water content and temperature on the triboelectrification of volcanic ash on long timescales
Joshua Méndez Harper, Leah Courtland, Josef Dufek +1
The effects of water and temperature on the triboelectrification of granular materials have been reported by numerous authors, but have not been studied robustly in the context of…