Evaluation of pore size distribution via fluid-fluid displacement porosimetry: The viscous bias

Maalal, Otman; Prat, Marc; Peinador, René Israel; Lasseux, Didier

doi:10.1016/j.ijmultiphaseflow.2022.103983

Cited by 3 publications

(11 citation statements)

References 25 publications

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“…22 However, one of the main disadvantages of capillary flow porometry is that it assumes that a porous material can be represented as a bundle of parallel cylindrical tubes with circular cross-sections. 10,20,[22][23][24][25] After all, it is widely acknowledged 18,22,23,25,26 that most filter media have a complex porous structure. Viswanathan et al 24 pointed out that this simplified representation of the porous geometry, which neglects the complexities associated with an irregular crosssection of the pores, can be a source of error in the estimated filter properties.…”

Section: € Angeslev€ a Et Almentioning

confidence: 99%

“…Moreover, Maalal et al 22 stated that 'the pressure drop between two adjacent pore bodies can be controlled by the constriction connecting them when this constriction is sufficiently narrow compared to the pore body size'. Maalal et al 20 stated that the constrictions in the pore space that correspond to the throat play an essential role because the menisci tend to get pinned in the constrictions during a drainage process, which is the result of capillary effects. As well as these points, Mourhatch et al 19 mentioned that the flow and transport processes through the porous materials are strong functions of the pore distribution in the pore space and their connection to one another.…”

Section: € Angeslev€ a Et Almentioning

confidence: 99%

“…This technique is described and used in several technical papers 4,13–26 and has many advantages, one of which is the possibility to measure numerous characteristics of a porous material, such as the largest and mean pore sizes, the PSD, gas permeability, and the envelope surface area. This nondestructive technique does not damage the sample and thus allows the reuse of the sample several times.…”

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confidence: 99%

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confidence: 99%

“…Maalal et al. 20 stated that the constrictions in the pore space that correspond to the throat play an essential role because the menisci tend to get pinned in the constrictions during a drainage process, which is the result of capillary effects. As well as these points, Mourhatch et al.…”

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confidence: 99%

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An improved procedure for calculating the pore size distribution of filter cloths in capillary flow porometry

Ängeslevä

Salmimies

Häkkinen

2023

Textile Research Journal

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Pore size distribution is one of the most important structural characteristics of filter cloths and can, in theory, be used to predict filtration performance. Capillary flow porometry is a common method to determine the pore diameter(s) and the pore size distribution of a porous material. Equipment applying this method has many advantages, but data processing and further calculations still require refining to be fit for purpose in calculations of flow capacity. The present study aims to develop a new procedure for processing volumetric flow rate data and corresponding pressure, which are measured by capillary flow porometry. The processed data are further used to calculate the pore size distribution of textile materials. Six industrial samples of polypropylene filter cloth were examined using scanning electron microscopy and capillary flow porometry. The raw data measured by the capillary flow porometer were processed using the developed method that considers changes in flow regimes as pressure increases. In addition, the nonideality of pores, originating from tortuosity, an irregular cross-sectional shape of the pore, and the number of pores, were considered in calculations by combining all these characteristics in one single parameter. This work shows that pores in a textile material are not ideal cylinders. The standard pore size distribution calculations should consider an imperfect pore structure and, therefore, be corrected.

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Section: € Angeslev€ a Et Almentioning

confidence: 99%

Section: € Angeslev€ a Et Almentioning

confidence: 99%

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confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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An improved procedure for calculating the pore size distribution of filter cloths in capillary flow porometry

Ängeslevä

Salmimies

Häkkinen

2023

Textile Research Journal

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Pore network simulations of thin porous medium characterization by evapoporometry

Maalal

Prat

Lasseux

2023

International Journal of Multiphase Flow

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Assessment of the Pore Diameter Measured in Gas-Liquid Displacement Porometry: Effect of the Capillary Constant

Ängeslevä

Salmimies²,

Rideal³

et al. 2023

J Por Media

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Determining pore sizes of porous media accurately is essential for many reasons. The standard ASTM F316 describing calculations used in gas-liquid displacement (GLD) porometry includes a factor B or a capillary constant. The standard does not explain the nature of this factor and the reasons for using its value. This work aimed to investigate the capillary constant, to understand its meaning and applicability in calculating the pore diameter. Another goal was to assess the pore diameter measured in GLD porometry by comparing it with pore diameters measured with image analysis and cut point test methods. Seven filter media samples with as simple a structure as possible were analyzed. An investigation of the capillary constant revealed at least five different approaches, of which all are by no means applied for the calculations of pore size. Using the 2 approach described in standard ASTM F316 to adjust the values obtained by GLD porometry was found unsuitable for the simply structured samples studied in this work. This work showed that the pore diameters measured by GLD porometry were most comparable with the other studied techniques when using Silwick as the wetting liquid. The raw data of bubble point pore and mean flow pore diameters measured by GLD porometry were similar to the largest pore sizes and mean pore diameters measured by image analysis and cut point test methods. This, in turn, confirmed the absence of the need to use any constants for calculating the pore diameters for the samples studied in this work.

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Evaluation of pore size distribution via fluid-fluid displacement porosimetry: The viscous bias

Cited by 3 publications

References 25 publications

An improved procedure for calculating the pore size distribution of filter cloths in capillary flow porometry

An improved procedure for calculating the pore size distribution of filter cloths in capillary flow porometry

Pore network simulations of thin porous medium characterization by evapoporometry

Assessment of the Pore Diameter Measured in Gas-Liquid Displacement Porometry: Effect of the Capillary Constant

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