Measure method of effective diffusion in gas oscillating in channels of variable radius or porous medium
The paper discusses a new technique for measuring the diffusion coefficient of vapor of a volatile fluid in air in long straight channels or porous media. The proposed experimental technique is universal and allows a) determining the coefficient of molecular diffusion of vapor of a volatile liquid i...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-01-01
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| Series: | MethodsX |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2215016121003447 |
| _version_ | 1819099463881326592 |
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| author | Denis Polezhaev Victor Kozlov Antonio Viviani |
| author_facet | Denis Polezhaev Victor Kozlov Antonio Viviani |
| author_sort | Denis Polezhaev |
| collection | DOAJ |
| description | The paper discusses a new technique for measuring the diffusion coefficient of vapor of a volatile fluid in air in long straight channels or porous media. The proposed experimental technique is universal and allows a) determining the coefficient of molecular diffusion of vapor of a volatile liquid in air; b) calculating the coefficient of effective diffusion of vapor in oscillating air. The proposed technique was tested in the study of the diffusion of 2-propanol vapor in air at rest and oscillating air in a channel of variable radius and a porous medium consisting of randomly packed hard spheres of equal diameter and was found to be relevant. Initial experiments with a porous medium show that the proposed experimental technique can also be used to estimate the diffusive tortuosity of porous media. The results of studies, finished and planned, are useful for understanding the physical processes taking place in various technical operations including wood and food drying, drug delivery, etc. • The new experimental technique provides accurate measurement of the molecular diffusion coefficient of vapor of a volatile fluid in air. • The experimental setup allows measuring the enhanced mass transfer of vapor of a volatile fluid in oscillating air in a straight channel of constant/variable radius and a porous medium. • The additional advantage of the present technique is that it enables the estimation of the diffusive tortuosity of a porous medium. |
| first_indexed | 2024-12-22T00:47:17Z |
| format | Article |
| id | doaj.art-d03670e71b9243aea1bfc5425cb287b2 |
| institution | Directory Open Access Journal |
| issn | 2215-0161 |
| language | English |
| last_indexed | 2024-12-22T00:47:17Z |
| publishDate | 2021-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | MethodsX |
| spelling | doaj.art-d03670e71b9243aea1bfc5425cb287b22022-12-21T18:44:32ZengElsevierMethodsX2215-01612021-01-018101552Measure method of effective diffusion in gas oscillating in channels of variable radius or porous mediumDenis Polezhaev0Victor Kozlov1Antonio Viviani2Perm State Humanitarian Pedagogical University, Laboratory of Vibrational Hydromechanics, Perm, Russia; Corresponding author.Perm State Humanitarian Pedagogical University, Laboratory of Vibrational Hydromechanics, Perm, RussiaUniversità della Campania “Luigi Vanvitelli”, Dipartimento d'Ingegneria, Aversa (CE), ItalyThe paper discusses a new technique for measuring the diffusion coefficient of vapor of a volatile fluid in air in long straight channels or porous media. The proposed experimental technique is universal and allows a) determining the coefficient of molecular diffusion of vapor of a volatile liquid in air; b) calculating the coefficient of effective diffusion of vapor in oscillating air. The proposed technique was tested in the study of the diffusion of 2-propanol vapor in air at rest and oscillating air in a channel of variable radius and a porous medium consisting of randomly packed hard spheres of equal diameter and was found to be relevant. Initial experiments with a porous medium show that the proposed experimental technique can also be used to estimate the diffusive tortuosity of porous media. The results of studies, finished and planned, are useful for understanding the physical processes taking place in various technical operations including wood and food drying, drug delivery, etc. • The new experimental technique provides accurate measurement of the molecular diffusion coefficient of vapor of a volatile fluid in air. • The experimental setup allows measuring the enhanced mass transfer of vapor of a volatile fluid in oscillating air in a straight channel of constant/variable radius and a porous medium. • The additional advantage of the present technique is that it enables the estimation of the diffusive tortuosity of a porous medium.http://www.sciencedirect.com/science/article/pii/S2215016121003447Molecular diffusionEffective diffusionOscillationsPorous mediumTortuosity |
| spellingShingle | Denis Polezhaev Victor Kozlov Antonio Viviani Measure method of effective diffusion in gas oscillating in channels of variable radius or porous medium MethodsX Molecular diffusion Effective diffusion Oscillations Porous medium Tortuosity |
| title | Measure method of effective diffusion in gas oscillating in channels of variable radius or porous medium |
| title_full | Measure method of effective diffusion in gas oscillating in channels of variable radius or porous medium |
| title_fullStr | Measure method of effective diffusion in gas oscillating in channels of variable radius or porous medium |
| title_full_unstemmed | Measure method of effective diffusion in gas oscillating in channels of variable radius or porous medium |
| title_short | Measure method of effective diffusion in gas oscillating in channels of variable radius or porous medium |
| title_sort | measure method of effective diffusion in gas oscillating in channels of variable radius or porous medium |
| topic | Molecular diffusion Effective diffusion Oscillations Porous medium Tortuosity |
| url | http://www.sciencedirect.com/science/article/pii/S2215016121003447 |
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