Permeability


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Related to Permeability: Relative permeability

permeability

[‚pər·mē·ə′bil·əd·ē]
(electromagnetism)
A factor, characteristic of a material, that is proportional to the magnetic induction produced in a material divided by the magnetic field strength; it is a tensor when these quantities are not parallel. Also known as magnetic permeability.
(fluid mechanics)
The ability of a membrane or other material to permit a substance to pass through it.
Quantitatively, the amount of substance which passes through the material under given conditions.
(geology)
The capacity of a porous rock, soil, or sediment for transmitting a fluid without damage to the structure of the medium. Also known as conductivity; perviousness.
(naval architecture)
The percentage of a given space in a ship that can be occupied by water.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

Permeability

A measure of the ability of a material, such as rock or soil, to transmit fluids or air through it.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved

permeability

1. The property of a porous material which permits the passage of water vapor through it. Also See permeance.
2. The property of soil, rock, or mantle which permits water to flow through it.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
The permeability tests were performed with a mixture of glycerin [p.a.
The laminates were produced with EP 2400 epoxy resin provided by Cytec, using the same processing parameters as in the permeability test.
In reality, it is likely that some part of the flow will still flow through the ridged areas; therefore, the real value of the wafer permeability will be between the two values described by Equations 6 and 7.
Take a core (A4) as an example, the relation curve between permeability and load time of effective stress was shown in Fig.8.
Figure 3 shows the changes in the permeability of sandstone under different temperatures and different confining pressures during conventional triaxial compression.
The permeability of granite specimen at different inlet gas pressures and temperatures is as shown in Figure 3.
Because the proportion of N2 in air accounts for 79.8% and it is very convenient to obtain compressed air under the mine, the air injection is selected to enhance the permeability. Therefore, the numerical simulation process uses air as the simulation condition, and the compressed air in the compressed air system is taken as the gas source to conduct the field gas injection permeability enhancement test.
Table 2 presents the means and standard deviations of the values of the permeability coefficients determined for each hydraulic gradient tested and the overall mean of all the results.
Malik, "Regulation of endothelial junctional permeability," Annals of the New York Academy of Sciences, vol.
The relationship between porosity and permeability of each region can be fitted, and the correlation coefficients of fitting equations are reasonably high.
where [[phi].sub.m0] and [k.sub.m0] are the initial porosity and permeability of matrix, [DELTA][[epsilon].sub.v] is total volumetric strain increment, [DELTA][P.sub.m]/[K.sub.s] is the changing in compressive strain, [K.sub.s] is the bulk modulus of the shale grains, [alpha] is the Biot coefficient, [DELTA][[epsilon].sub.s] is the gas sorption-induced volumetric strain increment, and [[epsilon].sub.L] the Langmuir volumetric strain constant representing the volumetric strain at infinite pore pressure.
Permeability values in literature have been measured/calculated in the range of 0.95x[10.sup.-14]-8x[10.sup.13][m.sup.2] for cordierite filters [36, 37, 38, 39, 40], 1.8-9.6x[10.sup.-14][m.sup.2] for the ash layer [34,37,41,42] and 3.2-3.3x[10.sup.-14] [m.sup.2] for the soot layer [34].