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 proceedingConference contributionScientificpeer-review

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 languageEnglish
Title of host publicationIRMMW-THz 2019 - 44th International Conference on Infrared, Millimeter, and Terahertz Waves
PublisherIEEE Computer Society
Number of pages2
ISBN (Electronic)9781538682852
DOIs
Publication statusPublished - Sep 2019
MoE publication typeA4 Article in a conference publication
EventInternational Conference on Infrared, Millimeter, and Terahertz Waves - Paris, France
Duration: 1 Sep 20196 Sep 2019
Conference number: 44

Publication series

NameInternational Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
Volume2019-September
ISSN (Print)2162-2027
ISSN (Electronic)2162-2035

Conference

ConferenceInternational Conference on Infrared, Millimeter, and Terahertz Waves
Abbreviated titleIRMMW-THz
CountryFrance
CityParis
Period01/09/201906/09/2019

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