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Transport in Porous Media, 2018
Changes in gas pressure or external stress cause changes in permeability; furthermore, the severity of stress disturbance in these situations can easily produce plastic yielding in the coal seam. Variations in coal seam permeability are also different between the elastic and plastic zones during the process of gas drainage.
Cun Zhang +4 more
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Changes in gas pressure or external stress cause changes in permeability; furthermore, the severity of stress disturbance in these situations can easily produce plastic yielding in the coal seam. Variations in coal seam permeability are also different between the elastic and plastic zones during the process of gas drainage.
Cun Zhang +4 more
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2012
In order to solve the evolution equations [Eqs. (4.36)–(4.38)] for the variables ρ, T, and X, we need to be able to express the auxiliary functions P, F, and q in terms of these variables. Additional physics must be included to accomplish this.
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In order to solve the evolution equations [Eqs. (4.36)–(4.38)] for the variables ρ, T, and X, we need to be able to express the auxiliary functions P, F, and q in terms of these variables. Additional physics must be included to accomplish this.
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2000
Having considered the average energy of an ideal gas, we now turn to the calculation of another simple mechanical property, namely the pressure P: the force per unit area that a gas exerts on the walls of its container. This Lecture presents three physically distinct calculations of P.The first calculation uses a direct approach based on Gibbs’s ...
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Having considered the average energy of an ideal gas, we now turn to the calculation of another simple mechanical property, namely the pressure P: the force per unit area that a gas exerts on the walls of its container. This Lecture presents three physically distinct calculations of P.The first calculation uses a direct approach based on Gibbs’s ...
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Ga(U)Ge pressure and absolute pressure
Journal of Chemical Education, 1979Air is progressively removed from a test tube; the pressure inside is measured using a standard tire-pressure gauge that is found to read atmospheric pressure when the test tube is fully evacuated.
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Gas‐gas equilibrium: High pressure limits
The Canadian Journal of Chemical Engineering, 1974AbstractRecent experimental studies of phase behavior in mixtures of light gases, at pressures up to ten thousand atmospheres, provide information about high pressure boundaries to regions of gas‐gas equilibrium. It is shown that these regions are generally bounded on the high pressure side by a three‐phase region of the type solid‐gas‐gas, which ...
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