Difficulties of subsurface liquid front tracking in porous media with terahertz pulsed imaging

M. Al-Sharabi; T. Mudley; D. Markl; P. Bawuah; A. P. Karttunen; C. J. Ridgway; P. A.C. Gane; J. Ketolainen; K. E. Peiponen; T. Rades; J. A. Zeitler

doi:10.1109/IRMMW-THz.2019.8874143

Difficulties of subsurface liquid front tracking in porous media with terahertz pulsed imaging

M. Al-Sharabi, T. Mudley, D. Markl, P. Bawuah, A. P. Karttunen, C. J. Ridgway, P. A.C. Gane, J. Ketolainen, K. E. Peiponen, T. Rades, J. A. Zeitler

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution book

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Abstract

Terahertz pulsed imaging (TPI) coupled with a customised flow cell has previously been used successfully to study liquid transport in porous media, such as powder compacts. In some samples, the tracking of the liquid front remains challenging when the refractive indices of liquid and sample are similar and hence little contrast is observed. In this work, we found that even when the relative difference between the refractive indices of liquid and sample is high, it can still be challenging to track the reflection peak of water in some samples while it works fine in others. It is hypothesised that this is due to the formation of a water gradient in these samples due to their specific microstructure and we explore methods to overcome this limitation.

Original language	English
Title of host publication	2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)
Place of Publication	Piscataway, N.J.
Publisher	IEEE
Number of pages	2
ISBN (Electronic)	9781538682852
DOIs	https://doi.org/10.1109/IRMMW-THz.2019.8874143
Publication status	Published - 21 Oct 2019
Event	44th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2019 - Paris, France Duration: 1 Sept 2019 → 6 Sept 2019

Publication series

Name	International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
Volume	2019-September
ISSN (Print)	2162-2027
ISSN (Electronic)	2162-2035

Conference

Conference	44th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2019
Country/Territory	France
City	Paris
Period	1/09/19 → 6/09/19

Keywords

terahertz pulsed imaging
refractive index
powder compacts

Access to Document

10.1109/IRMMW-THz.2019.8874143

Al-Sharabi-etal-IRMMW-2019-Difficulties-of-subsurface-liquid-front-tracking-in-porousAccepted author manuscript, 593 KB

Cite this

Al-Sharabi, M., Mudley, T., Markl, D., Bawuah, P., Karttunen, A. P., Ridgway, C. J., Gane, P. A. C., Ketolainen, J., Peiponen, K. E., Rades, T., & Zeitler, J. A. (2019). Difficulties of subsurface liquid front tracking in porous media with terahertz pulsed imaging. In 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz; Vol. 2019-September). IEEE. https://doi.org/10.1109/IRMMW-THz.2019.8874143

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abstract = "Terahertz pulsed imaging (TPI) coupled with a customised flow cell has previously been used successfully to study liquid transport in porous media, such as powder compacts. In some samples, the tracking of the liquid front remains challenging when the refractive indices of liquid and sample are similar and hence little contrast is observed. In this work, we found that even when the relative difference between the refractive indices of liquid and sample is high, it can still be challenging to track the reflection peak of water in some samples while it works fine in others. It is hypothesised that this is due to the formation of a water gradient in these samples due to their specific microstructure and we explore methods to overcome this limitation.",

keywords = "terahertz pulsed imaging, refractive index, powder compacts",

author = "M. Al-Sharabi and T. Mudley and D. Markl and P. Bawuah and Karttunen, {A. P.} and Ridgway, {C. J.} and Gane, {P. A.C.} and J. Ketolainen and Peiponen, {K. E.} and T. Rades and Zeitler, {J. A.}",

note = "{\textcopyright} 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting /republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.; 44th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2019 ; Conference date: 01-09-2019 Through 06-09-2019",

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Al-Sharabi, M, Mudley, T, Markl, D, Bawuah, P, Karttunen, AP, Ridgway, CJ, Gane, PAC, Ketolainen, J, Peiponen, KE, Rades, T & Zeitler, JA 2019, Difficulties of subsurface liquid front tracking in porous media with terahertz pulsed imaging. in 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz, vol. 2019-September, IEEE, Piscataway, N.J., 44th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2019, Paris, France, 1/09/19. https://doi.org/10.1109/IRMMW-THz.2019.8874143

Difficulties of subsurface liquid front tracking in porous media with terahertz pulsed imaging. / Al-Sharabi, M.; Mudley, T.; Markl, D. et al.
2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). Piscataway, N.J.: IEEE, 2019. (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz; Vol. 2019-September).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution book

TY - GEN

T1 - Difficulties of subsurface liquid front tracking in porous media with terahertz pulsed imaging

AU - Al-Sharabi, M.

AU - Mudley, T.

AU - Markl, D.

AU - Bawuah, P.

AU - Karttunen, A. P.

AU - Ridgway, C. J.

AU - Gane, P. A.C.

AU - Ketolainen, J.

AU - Peiponen, K. E.

AU - Rades, T.

AU - Zeitler, J. A.

N1 - © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting /republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

PY - 2019/10/21

Y1 - 2019/10/21

N2 - Terahertz pulsed imaging (TPI) coupled with a customised flow cell has previously been used successfully to study liquid transport in porous media, such as powder compacts. In some samples, the tracking of the liquid front remains challenging when the refractive indices of liquid and sample are similar and hence little contrast is observed. In this work, we found that even when the relative difference between the refractive indices of liquid and sample is high, it can still be challenging to track the reflection peak of water in some samples while it works fine in others. It is hypothesised that this is due to the formation of a water gradient in these samples due to their specific microstructure and we explore methods to overcome this limitation.

AB - Terahertz pulsed imaging (TPI) coupled with a customised flow cell has previously been used successfully to study liquid transport in porous media, such as powder compacts. In some samples, the tracking of the liquid front remains challenging when the refractive indices of liquid and sample are similar and hence little contrast is observed. In this work, we found that even when the relative difference between the refractive indices of liquid and sample is high, it can still be challenging to track the reflection peak of water in some samples while it works fine in others. It is hypothesised that this is due to the formation of a water gradient in these samples due to their specific microstructure and we explore methods to overcome this limitation.

KW - terahertz pulsed imaging

KW - refractive index

KW - powder compacts

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DO - 10.1109/IRMMW-THz.2019.8874143

M3 - Conference contribution book

AN - SCOPUS:85074699248

T3 - International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz

BT - 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)

PB - IEEE

CY - Piscataway, N.J.

T2 - 44th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2019

Y2 - 1 September 2019 through 6 September 2019

ER -

Al-Sharabi M, Mudley T, Markl D, Bawuah P, Karttunen AP, Ridgway CJ et al. Difficulties of subsurface liquid front tracking in porous media with terahertz pulsed imaging. In 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). Piscataway, N.J.: IEEE. 2019. (International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz). doi: 10.1109/IRMMW-THz.2019.8874143

Difficulties of subsurface liquid front tracking in porous media with terahertz pulsed imaging

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Keywords

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