Results 31 to 40 of about 131,723 (308)
Morphology of prestellar cores in pressure-confined filaments [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2018 ABSTRACT Observations of prestellar cores in star-forming filaments show two distinct morphologies. While molecular line measurements often show broad cores, submillimetre continuum observations predominantly display pinched cores compared to the bulk of the filament gas.
Heigl, S. +2 more
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Petroleum Exploration and Development, 2013 Based on the explosive fracturing simulation experiment for low permeability reservoir, growths of the cracks produced by the explosive fracturing in the samples were analyzed.
Peng XU +4 more
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Advances in Materials Science and Engineering, 2021 The effects of confining pressure and pore pressure on the deformation and permeability characteristics of raw coal are studied experimentally. The deformation properties of raw coal by fracture and its permeability evolution laws under the coupling ...
Kangwu Feng, Kequan Wang, Yushun Yang
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Mechanical properties of thermal aged HTPB composite solid propellant under confining pressure
Defence Technology, 2022 With the purpose of investigating the effects of confining pressure and aging on the mechanical properties of Hydroxyl-terminated polybutadiene (HTPB) based composite solid propellant, tensile tests of thermal accelerated aged propellant samples under ...
Zhe-jun Wang, Hong-fu Qiang
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Pressure-confined Lyman-alpha clouds
The Astrophysical Journal, 1989 Results are presented of numerical models of pressure-confined spherical gas clouds which produce absorption resembling the low to intermediate atomic column density lines found in high-redshift QSO spectra. One-dimensional hydrodynamical models including electron conduction are described, and the rate equations are solved to find ionization and ...
E. Baron +3 more
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Study on the damage characteristics of gas-bearing shale under different unloading stress paths.
PLoS ONE, 2019 In order to understand the influence of unloading on the mechanical properties of shale rock, triaxial unloading tests under different stress paths were conducted.
Yintong Guo, Lei Wang, Xin Chang
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The Pressure induced by salt crystallization in confinement [PDF]
Scientific Reports, 2016 AbstractSalt crystallization is a major cause of weathering of rocks, artworks and monuments. Damage can only occur if crystals continue to grow in confinement, i.e. within the pore space of these materials, thus generating mechanical stress. We report the direct measurement, at the microscale, of the force exerted by growing alkali halide salt ...
Desarnaud, J., Bonn, D., Shahidzadeh, N.
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Shiyou jixieTo address challenges such as low operating efficiency and poor descaling effect in jet stimulation operation of deep/ultra-deep wells， the influence of downhole environmental pressure （confining pressure） on jet dynamic pressure has been studied at home
Zhou Shijie +5 more
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Numerical Investigation on the Hydraulic Fracture Evolution of Jointed Shale
Advances in Materials Science and Engineering, 2021 Joints are a common structure of heterogeneous shale rock masses, and in situ stress is the environment in which heterogeneous rock masses can be found. The existence of joint plane and confining pressure difference influences the physical properties of ...
Xiaoxi Men, Jiaxu Jin
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Meikuang Anquan, 2023 The study of coal bump-prone property under confining pressure plays a key role in exploring the formation mechanism of coal burst in deep underground mines.
Chuanjiu ZHANG +3 more
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