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All Outputs (7)

The force required to operate the plunger on a French press (2021)
Journal Article
Wadsworth, F. B., Vossen, C. E., Heap, M. J., Kushnir, A., Farquharson, J. I., Schmid, D., …Kendrick, J. E. (2021). The force required to operate the plunger on a French press. American Journal of Physics, 89, Article 769. https://doi.org/10.1119/10.0004224

The French press is a popular device for brewing coffee, comprising a cylindrical beaker—or “jug”—fitted with a lid and plunger with a fine wire mesh filter. The plunger is used to drive the solid coffee particles to the bottom of the jug, separating... Read More about The force required to operate the plunger on a French press.

Permeability of packs of polydisperse hard spheres (2021)
Journal Article
Vasseur, J., Wadsworth, F. B., Coumans, J. P., & Dingwell, D. B. (2021). Permeability of packs of polydisperse hard spheres. Physical Review E, 103(6), https://doi.org/10.1103/physreve.103.062613

The permeability of packs of spheres is important in a wide range of physical scenarios. Here, we create numerically generated random periodic domains of spheres that are polydisperse in size and use lattice-Boltzmann simulations of fluid flow to det... Read More about Permeability of packs of polydisperse hard spheres.

Volcanic Unrest at Taupō Volcano in 2019: Causes, Mechanisms and Implications (2021)
Journal Article
Illsley‐Kemp, F., Barker, S. J., Wilson, C. J., Chamberlain, C. J., Hreinsdóttir, S., Ellis, S., …Wadsworth, F. B. (2021). Volcanic Unrest at Taupō Volcano in 2019: Causes, Mechanisms and Implications. Geochemistry, Geophysics, Geosystems, 22(6), https://doi.org/10.1029/2021gc009803

Taupō volcano, New Zealand, is a large caldera volcano that has been highly active through the Holocene. It most recently erupted ∼1,800 years ago but there have been multiple periods of historic volcanic unrest. We use seismological and geodetic ana... Read More about Volcanic Unrest at Taupō Volcano in 2019: Causes, Mechanisms and Implications.

Pressure-Driven Opening and Filling of a Volcanic Hydrofracture Recorded by Tuffisite at Húsafell, Iceland: A Potential Seismic Source (2021)
Journal Article
Unwin, H. E., Tuffen, H., Phillips, E., Wadsworth, F. B., & James, M. R. (2021). Pressure-Driven Opening and Filling of a Volcanic Hydrofracture Recorded by Tuffisite at Húsafell, Iceland: A Potential Seismic Source. Frontiers in Earth Science, 9, https://doi.org/10.3389/feart.2021.668058

The opening of magmatic hydraulic fractures is an integral part of magma ascent, the triggering of volcano seismicity, and defusing the explosivity of ongoing eruptions via outgassing magmatic volatiles. If filled with pyroclastic particles, these fr... Read More about Pressure-Driven Opening and Filling of a Volcanic Hydrofracture Recorded by Tuffisite at Húsafell, Iceland: A Potential Seismic Source.

Rapid alteration of fractured volcanic conduits beneath Mt Unzen (2021)
Journal Article
Yilmaz, T. I., Wadsworth, F. B., Gilg, H. A., Hess, K., Kendrick, J. E., Wallace, P. A., …Dingwell, D. B. (2021). Rapid alteration of fractured volcanic conduits beneath Mt Unzen. Bulletin of Volcanology, 83(5), Article 34. https://doi.org/10.1007/s00445-021-01450-7

The nature of sub-volcanic alteration is usually only observable after erosion and exhumation at old inactive volcanoes, via geochemical changes in hydrothermal fluids sampled at the surface, via relatively low-resolution geophysical methods or can b... Read More about Rapid alteration of fractured volcanic conduits beneath Mt Unzen.

Mechanical Compaction of Crustal Analogs Made of Sintered Glass Beads: The Influence of Porosity and Grain Size (2021)
Journal Article
Carbillet, L., Heap, M. J., Baud, P., Wadsworth, F. B., & Reuschlé, T. (2021). Mechanical Compaction of Crustal Analogs Made of Sintered Glass Beads: The Influence of Porosity and Grain Size. Journal of Geophysical Research. Solid Earth, 126(4), Article e2020JB021321. https://doi.org/10.1029/2020jb021321

The fundamentals of our understanding of the mechanical compaction of porous rocks stem from experimental studies. Yet, many of these studies use natural materials for which microstructural parameters are intrinsically coupled, hampering the diagnosi... Read More about Mechanical Compaction of Crustal Analogs Made of Sintered Glass Beads: The Influence of Porosity and Grain Size.