Esteban Rougier

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Despite the impact that hydraulic fracturing has had on the energy sector, the physical mechanisms that control its efficiency and environmental impacts remain poorly understood in part because the length scales involved range from nanometres to kilometres. We characterize flow and transport in shale formations across and between these scales using(More)
Underground nuclear weapon testing produces radionuclide gases which may seep to the surface. Barometric pumping of gas through explosion-fractured rock is investigated using a new sequentially-coupled hydrodynamic rock damage/gas transport model. Fracture networks are produced for two rock types (granite and tuff) and three depths of burial. The fracture(More)
There is theoretical and observational evidence that asteroids and comets are conglomerations of particles ranging in size from dust grains to boulders. It is well known that energy added to such systems is dissipated by friction, plasticity and fracture. In addition to these physical phenomena, we find that energy can be dissipated in the form of particle(More)
This paper reports on continued research toward establishing a consistent modeling framework for calculating nuclear explosions in earth materials. The model must be consistent with observed phenomena in the near-field by correctly 1) calculating the resulting explosive cavity radius for a given yield and depth of burial, 2) accounting for the correct(More)
This paper reports on research activities developed during the first year of this project. The main tasks accomplished and reported in this paper are: a) the development of new computational equation of state (EOS) for granite. Onedimensional calculations using this EOS captures the first principles physics of the near source region and identifies the(More)
The Source Physics Experiment (SPE-N) was designed to provide a carefully controlled seismic and strong motion data set from buried explosions at the Nevada National Security Site (NNSS). The first experiment in a series (SPE1) was conducted in May of this year. It consisted of a 100 kg high explosive stemmed for coupling at 180 feet below the surface. In(More)
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