Results 11 to 20 of about 16,352 (264)
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.
openaire +4 more sources
Geofluids, 2021 In order to obtain the mechanical behavior and permeability characteristics of coal under the coupling action of stress and seepage, permeability tests under different confining pressures in the process of deformation and destruction of briquette coal ...
Ma Haifeng +6 more
doaj +1 more source
Experimental study on permeability characteristics of gas-containing raw coal under different stress conditions [PDF]
Royal Society Open Science, 2018 The present experimental study on permeability characteristics for raw coal under different stress states is implemented by applying the triaxial self-made ‘THM coupled with servo-controlled seepage apparatus for gas-containing coal’; the result ...
Dongming Zhang +5 more
doaj +1 more source
Meitan kexue jishu, 2023 Deep buried rock is often in a non-hydrostatic initial ground stress field, and the different stress states lead to different rock response under dynamic loading.
Shizheng FANG +4 more
doaj +1 more source
ON THE COAGULATION AND SIZE DISTRIBUTION OF PRESSURE CONFINED CORES [PDF]
The Astrophysical Journal, 2013 Observations of the Pipe Nebula have led to the discovery of dense starless cores. The mass of most cores is too small for their self gravity to hold them together. Instead, they are thought to be pressure confined. The observed dense cores' mass function (CMF) matches well with the initial mass function (IMF) of stars in young clusters.
Huang, Xu, Zhou, Tingtao, Lin, D. N. C.
openaire +3 more sources
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
openaire +3 more sources
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
doaj +3 more sources
Acoustic waves in granular packings at low confinement pressure [PDF]
Review of Scientific Instruments, 2020 Elastic properties of a granular packing show a nonlinear behavior determined by its discrete structure and nonlinear inter-grain force laws. Acoustic waves show a transition from constant, pressure-dependent sound speed to a shock-wave-like behavior with an amplitude-determined propagation speed.
Karsten Tell +4 more
openaire +3 more sources
Effects of Confinement and Pressure on the Vibrational Behavior of Nano-Confined Propane
The Journal of Physical Chemistry A, 2018 Fluids confined in nanopores exhibit significant deviations in their structure and dynamics from the bulk behavior. Although phase, structural, and diffusive behaviors of confined fluids have been investigated and reported extensively, confinement effects on the vibrational properties are less understood.
Siddharth Gautam +5 more
openaire +3 more sources
Geofluids, 2021 This manuscript studied the effects of variable axial pressure loading rate and variable confining pressure unloading rate on the deformation behavior and seepage characteristics of raw coal under alternate loading and unloading of axial pressure and ...
Kangwu Feng +3 more
doaj +1 more source