A general model for welding of ash particles in volcanic systems validated using in situ X-ray tomography (2019)
Journal Article
Wadsworth, F. B., Vasseur, J., Schauroth, J., Llewellin, E. W., Dobson, K. J., Havard, T., …Heap, M. J. (2019). A general model for welding of ash particles in volcanic systems validated using in situ X-ray tomography. Earth and Planetary Science Letters, 525, Article 115726. https://doi.org/10.1016/j.epsl.2019.115726

Welding occurs during transport and deposition of volcanic particles in diverse settings, including pyroclastic density currents, volcanic conduits, and jet engines. Welding rate influences hazard-relevant processes, and is sensitive to water concent... Read More about A general model for welding of ash particles in volcanic systems validated using in situ X-ray tomography.

Topological inversions in coalescing granular media control fluid-flow regimes (2017)
Journal Article
Wadsworth, F., Vasseur, J., Llewellin, E., Dobson, K., Colombier, M., von Aulock, F., …Dingwell, D. (2017). Topological inversions in coalescing granular media control fluid-flow regimes. Physical Review E, 96(3), Article 033113. https://doi.org/10.1103/physreve.96.033113

Sintering—or coalescence—of viscous droplets is an essential process in many natural and industrial scenarios. Current physical models of the dynamics of sintering are limited by the lack of an explicit account of the evolution of microstructural geo... Read More about Topological inversions in coalescing granular media control fluid-flow regimes.

Sintering of viscous droplets under surface tension (2016)
Journal Article
Wadsworth, F. B., Vasseur, J., Llewellin, E., Schauroth, J., Dobson, K., Scheu, B., & Dingwell, D. (2016). Sintering of viscous droplets under surface tension. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 472(2188), Article 20150780. https://doi.org/10.1098/rspa.2015.0780

We conduct experiments to investigate the sintering of high-viscosity liquid droplets. Free-standing cylinders of spherical glass beads are heated above their glass transition temperature, causing them to densify under surface tension. We determine t... Read More about Sintering of viscous droplets under surface tension.