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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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3D characterization of sand particle-to-particle contact and morphology
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Evaluation of contact angle between asphalt binders and aggregates using Molecular Dynamics (MD) method
Abstract not provided
Experiments and modeling of variably permeable carbonate reservoir samples in contact with CO₂-acidified brines
Reactive experiments were performed to expose sample cores from the Arbuckle carbonate reservoir to CO₂-acidified brine under reservoir temperature and pressure conditions. The samples consisted of dolomite with varying quantities of calcite and silica/chert. The timescales of monitored pressure decline across each sample in response to CO₂ exposure, as well as the amount of and nature of dissolution features, varied widely among these three experiments. For all samples cores, the experimentally measured initial permeability was at least one order of magnitude or more lower than the values estimated from downhole methods. Nondestructive X-ray computed tomography (XRCT) imaging revealed dissolution features including “wormholes,” removal of fracture-filling crystals, and widening of pre-existing pore spaces. In the injection zone sample, multiple fractures may have contributed to the high initial permeability of this core and restricted the distribution of CO₂-induced mineral dissolution. In contrast, the pre-existing porosity of the baffle zone sample was much lower and less connected, leading to a lower initial permeability and contributing to the development of a single dissolution channel. While calcite may make up only a small percentage of the overall sample composition, its location and the effects of its dissolution have an outsized effect on permeability responses to CO₂ exposure. The XRCT data presented here are informative for building the model domain for numerical simulations of these experiments but require calibration by higher resolution means to confidently evaluate different porosity-permeability relationships.
Theoretical consideration of contact angle hysteresis using surface-energy-minimization methods
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Energy coupling across low-dimensional contact interfaces at the atomic scale
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A blockchain empowered and privacy preserving digital contact tracing platform
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Nonlinear/linear resonance ultrasound spectroscopy (N/RUS) of additively manufactured 316L stainless steel samples using in-contact and non-contact excitation
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High-resolution of particle contacts via fluorophore exclusion in deep-imaging of jammed colloidal packings
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Search for contact interactions in dilepton events from pp collisions at root s=7 TeV with the ATLAS detector
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Detailed investigation of TLM contact resistance measurements on crystalline silicon solar cells
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Development of 22.5 % p-type tunnel oxide passivated contact solar cells through efficiency enhancement by replacing local Al-BSF in PERC cells with (p+) poly-Si/SiO2 carrier selective contact
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