Soil-Air Permeability Measurement with a Transient Pressure Buildup Method

Cho, Jong Soo; Ellett, D.M.

doi:10.1089/hwm.1995.12.365

Cited by 1 publication

(3 citation statements)

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“…The simulation is based on solving the set of fundamental equations for P (equation (15) or (16)) with proper boundary (equation (18)) and initial conditions.…”

Section: Inverse Methodsmentioning

confidence: 99%

“…13 Unsteady gas flow is used extensively to determine permeability of soil in field tests 14 or in laboratory tests with dropping 13,22 or raising pressure methods (DPMs or RPMs). 15…”

Section: Porous Materialsmentioning

confidence: 99%

“…[5][6][7][8][9][10][11] Experimentally, compared with liquid measurement, the use of gas has an advantage of short experimental time due to low gas viscosity, and hence, gas permeability measurement has been extensively applied to materials with small permeabilities, such as rocks, soils, membranes and ceramics. [12][13][14][15] Following a review of theoretical and experimental aspects of gas flow in porous media ('Fundamentals on gas flow through porous media' and 'Review on permeability measurements using gas' sections), this article proposes a methodology to measure fabric inplane permeability using a transient one-dimensional (1D) gas flow using vacuum ('Permeability measurement of fibrous material using vacuum' section). A thorough study of the transport of a compressible fluid is performed.…”

Section: Introductionmentioning

confidence: 99%

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Gas transport in fibrous media: Application to in-plane permeability measurement using transient flow

Hou

Comas-Cardona

Binétruy

et al. 2012

Journal of Composite Materials

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International audienceThis article introduces a methodology to measure in-plane permeability of fibrous media using a transient one-dimensional air flow with absolute pressures ranging from 10(3) to 10(5)Pa. The method, based on the measurement of gas pressure at the boundaries throughout the transient flow, is convenient, clean and fast, avoids usage of a gas flow meter and offers a way to study the gas transport within fibrous media. The transport of a compressible fluid is described by several models to comply with different flow regimes which can occur during the experimental measurements. A thermal analysis is given to verify the validity of isothermal conditions during the tests. The permeability, only depending on the fibrous structure, is determined by inverse method, fitting the simulation results to the experimental data obtained using raising or dropping pressure methods. The deviation from Darcy's law caused by gas sliding effect is analysed and a relative parameter of fabric material shows a dependence in permeability, with a similar trend as the Klinkenberg sliding parameter in soils and rocks

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“…The simulation is based on solving the set of fundamental equations for P (equation (15) or (16)) with proper boundary (equation (18)) and initial conditions.…”

Section: Inverse Methodsmentioning

confidence: 99%

“…13 Unsteady gas flow is used extensively to determine permeability of soil in field tests 14 or in laboratory tests with dropping 13,22 or raising pressure methods (DPMs or RPMs). 15…”

Section: Porous Materialsmentioning

confidence: 99%