Results 11 to 20 of about 20,734 (265)

Dynamic evolution mechanism of water-bearing coal permeability and water film under stress

open access: yesMeitan kexue jishu, 2023
To explore coal permeability evolution mechanism under the comprehensive action of multiple factors including stress - adsorption - water and slippage effect, considering the coal deformation induced by stress - adsorption, the expression of water film ...
Shulei DUAN   +3 more
doaj   +1 more source

A basic model of unconventional gas microscale flow based on the lattice Boltzmann method

open access: yesPetroleum Exploration and Development, 2021
A new method for selecting dimensionless relaxation time in the lattice Boltzmann model was proposed based on similarity criterion and gas true physical parameters.
Yulong ZHAO   +3 more
doaj   +1 more source

A Novel Permeability Model of Coal Considering Gas Slippage and Gas Sorption-Induced Strain

open access: yesEnergies, 2022
As an unconventional natural gas, coalbed methane (CBM) has been recognized as a significant fuel and chemical feedstock that should be recovered. Permeability is a key factor that controls CBM transport in coal.
Man Wang, Junpeng Zou
doaj   +1 more source

Multiscale Apparent Permeability Model of Shale Nanopores Based on Fractal Theory

open access: yesEnergies, 2019
Based on fractal geometry theory, the Hagen−Poiseuille law, and the Langmuir adsorption law, this paper established a mathematical model of gas flow in nano-pores of shale, and deduced a new shale apparent permeability model.
Qiang Wang   +5 more
doaj   +1 more source

EFFECT OF TIRES INFLATION PRESSURE , TILLAGE DEPTH AND FORWARD SPEED ON SOME FIELD PERFORMANCE CRITERIA OF TRACTOR [PDF]

open access: yesMesopotamia Journal of Agriculture, 2011
The research was conducted to investigate the effect of two inflation pressures for the rear tires of tractor 80 and 130 kpa with two plowing depths by using the moldboard plow 15 - 20 and 20 – 25 cm and three different speeds 2.22 , 3.22 and 5.85 km/hr
Mothana A. Al - Jarrah
doaj   +1 more source

Coupled model of deformation and gas flow process with temperature and slippage effect

open access: yesJournal of Hebei University of Science and Technology, 2015
The effects of temperature, slippage effect and effective stress of coal on the coupled mechanism of deformation and gas glow are key issues to control coal and gas outburst and design the methane recovery engineering.
Chunhui ZHANG   +2 more
doaj   +1 more source

Autophagy Governs Protumorigenic Effects of Mitotic Slippage–induced Senescence [PDF]

open access: yesMolecular Cancer Research, 2018
Abstract The most commonly utilized class of chemotherapeutic agents administered as a first-line therapy are antimitotic drugs; however, their clinical success is often impeded by chemoresistance and disease relapse. Hence, a better understanding of the cellular pathways underlying escape from cell death is critical. Mitotic slippage
Rekha Jakhar   +23 more
openaire   +4 more sources

EFFECT OF TWO TYPES (FURROW OPENERS AND CLOSERS) IN ZERO TILLEGE SEEDER ON SOME MECHANIZATION TRAITS [PDF]

open access: yesMesopotamia Journal of Agriculture, 2018
A field experiment was carried out during the agricultural season (2012-2013) in Moderate Rainfall Area-MRA /Nineveh governorate. Italian Gaspardo Sc250 Seeder modified to ZT farming system used in the cultivation of bread wheat.
Saad Al rijabo   +1 more
doaj   +1 more source

Slippage during High-Pressure Torsion: Accumulative High-Pressure Torsion—Overview of the Latest Results

open access: yesMetals, 2023
This overview examines the results of a study of the effect of slippage in high-pressure torsion (HPT). A number of papers in this area and the works of the authors of this overview are considered.
Dmitriy V. Gunderov   +3 more
doaj   +1 more source

EFFECT OF DISK ANGLE AND PLOWING SPEEDS IN SOME PHYSICAL PROPERTIES OF SOIL AND IN THE PERFORMANCE OF VERTICAL DISK PLOW [PDF]

open access: yesMesopotamia Journal of Agriculture, 2006
The research was carried out at Hummaidat township 15km west of Mosul city to investigate the effect of disk angle (35ْ,42ْ,and 48ْ) of the vertical disk plow with three plowing speeds (4.86,7.24 and 9.30)km/hr on number of masses exceeded 10 cm/m2, bulk
Mothana A.AL-Jarrah
doaj   +1 more source

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