The University of Southampton
University of Southampton Institutional Repository

Observation of thermally driven water flow in soils via micro-focus X-ray Computed Tomography

Observation of thermally driven water flow in soils via micro-focus X-ray Computed Tomography
Observation of thermally driven water flow in soils via micro-focus X-ray Computed Tomography
It is well-known that moisture movement and heat transfer often happen simultaneously in unsaturated soils, therefore forming a coupled flow pattern. This process is relevant for ground source heat pump systems, nuclear waste disposal or other areas of energy geotechnology. However, studies on the analysis of water flow in response to thermal variations are still required, especially in terms of quantitative analysis in three-phase unsaturated soil systems. This paper presents a study conducted using advanced microfocus X-ray Computed Tomography (micro-XCT) techniques, which enables both the visualisation of moisture progression and quantification of water change within the soil system. Heat was applied to the soil specimen, inducing heat transfer accompanied with the water flow under the thermal gradient. A series of short scans were operated at different temporal stages during the heating process, enabling the acquisition of representative image data for quantitative analysis. The results in terms of moisture distribution during the heating process have been obtained and interpreted. The study shows that the micro-XCT is able to assess the imposed coupled thermal-moisture flow processes in soils, which will help understand fundamental soil processes and provide quantitative data for the relevant model validation.
Liu, Kui
b139a990-b02b-4d02-b39d-fdde16302ac8
Boardman, Richard
5818d677-5732-4e8a-a342-7164dbb10df1
Loveridge, Fleur
fb5b7ad9-d1b8-40d3-894b-bccedf0e8a77
Powrie, William
600c3f02-00f8-4486-ae4b-b4fc8ec77c3c
Liu, Kui
b139a990-b02b-4d02-b39d-fdde16302ac8
Boardman, Richard
5818d677-5732-4e8a-a342-7164dbb10df1
Loveridge, Fleur
fb5b7ad9-d1b8-40d3-894b-bccedf0e8a77
Powrie, William
600c3f02-00f8-4486-ae4b-b4fc8ec77c3c

Liu, Kui, Boardman, Richard, Loveridge, Fleur and Powrie, William (2018) Observation of thermally driven water flow in soils via micro-focus X-ray Computed Tomography. In UNSAT 2018.

Record type: Conference or Workshop Item (Paper)

Abstract

It is well-known that moisture movement and heat transfer often happen simultaneously in unsaturated soils, therefore forming a coupled flow pattern. This process is relevant for ground source heat pump systems, nuclear waste disposal or other areas of energy geotechnology. However, studies on the analysis of water flow in response to thermal variations are still required, especially in terms of quantitative analysis in three-phase unsaturated soil systems. This paper presents a study conducted using advanced microfocus X-ray Computed Tomography (micro-XCT) techniques, which enables both the visualisation of moisture progression and quantification of water change within the soil system. Heat was applied to the soil specimen, inducing heat transfer accompanied with the water flow under the thermal gradient. A series of short scans were operated at different temporal stages during the heating process, enabling the acquisition of representative image data for quantitative analysis. The results in terms of moisture distribution during the heating process have been obtained and interpreted. The study shows that the micro-XCT is able to assess the imposed coupled thermal-moisture flow processes in soils, which will help understand fundamental soil processes and provide quantitative data for the relevant model validation.

Text
UNSAT2018_KLiu
Download (749kB)

More information

Published date: 9 January 2018

Identifiers

Local EPrints ID: 425398
URI: http://eprints.soton.ac.uk/id/eprint/425398
PURE UUID: 29223b6e-c597-431f-bdda-73a38cc30671
ORCID for Fleur Loveridge: ORCID iD orcid.org/0000-0002-6688-6305
ORCID for William Powrie: ORCID iD orcid.org/0000-0002-2271-0826

Catalogue record

Date deposited: 17 Oct 2018 16:30
Last modified: 08 May 2020 00:25

Export record

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×