effective permeability

effective permeability

[ə¦fek·tiv pər·mē·ə′bil·əd·ē]
(physical chemistry)
The observed permeability exhibited by a porous medium to one fluid phase when there is physical interaction between this phase and other fluid phases present.
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2 to about 5 mm, wherein one or more portion(s) of the absorbent structure comprise (s) at least about 90% by weight of superabsorbent polymer particles and require (s) a time to reach an uptake of about 20 g/g (T20) of less than about 440 s as measured according to the K(t) test method; wherein the superabsorbent polymer particles are comprised in the absorbent core, such that the superabsorbent polymer particles are deposited between a first and a second substrate layer, with the first substrate layer facing towards the backsheet and the second substrate layer facing towards the topsheet wherein the one or more portion(s) of the absorbent structure have an effective permeability at about 20 minutes (K20) of at least about 2.
The geometric mean is typically used to estimate effective permeability from small-scale samples (Jensen 1991).
The size of the air gap which will be prepared for the coil is also an important factor for specifying effective permeability as well as for not spoiling the homogeneity of the flux passing through the air gap.
Although oil fluorescence was observed in samples from 6395' to TD, subsequent isolation and testing of the sand yielded no inflow indicating lack of effective permeability in this sand at this location.
to predict the effective permeability coefficients, where [beta] = 0.
o] = original pressure A = surface area of tire innerliner V = contained air volume Q = effective permeability constant of the tire construction T = effective average thickness of the tire components
2 to 5 mm; wherein the absorbent core comprises at least 90% of superabsorbent polymer particles, and wherein the superabsorbent polymer particles comprised by the absorbent core in the front portion or the crotch portion of the absorbent article or by the whole absorbent core require a time to reach an uptake of 20 g/g (T20) of less than 240 s as measured according to the K(t) Test Method wherein the superabsorbent polymer particles comprised by the absorbent core in the front portion or the crotch portion of the absorbent article or by the whole absorbent core have an effective permeability at 20 minutes (K20) of at least 5*10-8 cm2 as measured according to the K(t) Test Method.
The holes that are drilled increase the effective permeability of the coal seam and safely allow any trapped methane to find a pathway to the surface prior to the commencement of mining operations.
Determination of gas permeability in the voids is necessary to determine the effective permeability of the "void and molecular sieve phase.
Human effective permeability values will be estimated from in vitro and animal data using QMPRPlus(TM).

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