Hitoshi Mikada results 5
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Numerical Simulation of Hydraulic Fracturing in Enhanced Geothermal Systems Considering Thermal Stress CracksNARA Subscribed
With the increasing attention to clean and economical energy resources, geothermal energy and enhanced geothermal systems (EGS) have gained much importance in recent years. For the efficient development of deep geothermal reservoirs, it is crucial to understand the mechanical behavior of reservoir rock and its interaction with injected fluid under high-temperature and high confining pressure environments for employing hydrauli...
Full-Waveform Inversion for Imaging Faulted Structures: A Case Study from the Japan Trench Forearc SlopeNARA Subscribed
Full-waveform inversion (FWI) of limited-offset marine seismic data is a challenging task due to the lack of refracted energy and diving waves from the shallow sediments, which are fundamentally required to update the long-wavelength background velocity model in a tomographic fashion. When these events are absent, a reliable initial velocity model is necessary to ensure that the observed and simulated waveforms kinematically f...
Coupled Simulation of Seismic Wave Propagation and Failure Phenomena by Use of an MPS MethodNARA Subscribed
The failure of brittle materials, for example glasses and rock masses, is commonly observed to be discontinuous. It is, however, difficult to simulate these phenomena by use of conventional numerical simulation methods, for example the finite difference method or the finite element method, because of the presence of computational grids or elements artificially introduced before the simulation. It is, therefore, important for r...
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