Results 11 to 20 of about 5,144,321 (345)
Journal of Marine Science and Engineering, 2022 The mechanical properties of hydrate-bearing strata in clayey-silt sediments are significantly different from those of either conventional reservoirs or hydrate-bearing sandy sediments, which poses great challenges for wellbore stability analyses.
Xiaofeng Sun +4 more
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GRAVITATIONAL COLLAPSE WITH TANGENTIAL PRESSURE [PDF]
International Journal of Modern Physics D, 2011 Using the general formalism for spherical gravitational collapse developed in [P. S. Joshi and I. H. Dwivedi, Class. Quant. Grav.16 (1999) 41; P. S. Joshi and R. Goswami, Phys. Rev. D76 (2007) 084026], we investigate here the final fate of a spherical distribution of a matter cloud, where radial pressures vanish but tangential pressures are nonzero ...
Malafarina, Daniele, Joshi, Pankaj S.
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Frontiers in Physics, 2021 For horizontal wells in Longmaxi Formation, oil-based drilling fluid that soaks for a long time is more likely to cause a wellbore collapse. Therefore, in this paper, the downhole core method of shale formation, in Longmaxi Formation, was adopted. First,
Fan Zhang +5 more
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Metals, 2022 To evaluate the collapse pressure of the steel–composite hybrid cylinders under external pressure without excessive computational cost, an analytical formula was derived in this study. The rationality of the derived formula was verified by the comparison
Xinlong Zuo +4 more
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Pressure-Induced Collapse of Magnetic Order in Jarosite [PDF]
Physical Review Letters, 2020 We report a pressure-induced phase transition in the frustrated kagom material jarosite at ~45 GPa, which leads to the disappearance of magnetic order. Using a suite of experimental techniques, we characterize the structural, electronic, and magnetic changes in jarosite through this phase transition.
Ryan A. Klein +14 more
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Collapse pressure measurement of single hollow glass microsphere using single-beam acoustic tweezer
Ultrasonics Sonochemistry, 2022 Microbubbles are widely used in medical ultrasound imaging and drug delivery. Many studies have attempted to quantify the collapse pressure of microbubbles using methods that vary depending on the type and population of bubbles and the frequency band of ...
Jinhee Yoo +4 more
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The acoustic pressure generated by the cavitation bubble expansion and collapse near a rigid wall
, 2021 We analyze systematically the acoustic transients emitted during the collapse of a laser-induced cavitation bubble for 0.4 ≤ γ ≤ 5.2. γ is the standoff parameter, the ratio of the distance between the bubble's nucleation place and its maximum size.
S. R. Gonzalez-Avila +2 more
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X-ray study of pressure-collapsed fullerite [PDF]
Physical Review B, 1993 X-ray-diffraction studies are described for a new phase of carbon called collapsed fullerite (CF) that was produced by application of high pressure to fullerite (${\mathrm{C}}_{60}$). At \ensuremath{\sim}20 GPa there is an irreversible transition to a phase that has neither the (111) Bragg peak of diamond nor any of the Bragg peaks associated with the ...
Kosowsky, S. D. +5 more
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Magnetic Collapse in Fe3Se4 under High Pressure
Materials, 2022 Electronic structure and magnetic properties of Fe3Se4 are calculated using the density functional approach. Due to the metallic properties, magnetic moments of the iron atoms in two nonequivalent positions in the unit cell are different from ionic values for Fe3+ and Fe2+ and are equal to M1=2.071μB and M2=−2.042μB, making the system ferrimagnetic ...
Lyudmila V. Begunovich +2 more
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AIP Advances, 2022 A lattice Boltzmann pseudopotential cavitation model with tunable surface tension and large density and viscosity coefficient ratios was used to simulate near-wall cavitation bubble collapse.
Jinchao He +5 more
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