Multidimensional Imaging of Density Driven Convection in a Porous Medium
File(s)1-s2.0-S1876610217318428-main.pdf (778.56 KB)
Published version
Author(s)
Liyanage, R
Crawshaw
Krevor
Pini, R
Type
Conference Paper
Abstract
Carbon dioxide (CO2) sequestration is a climate change mitigation technique which relies on residual and solubility trapping in injection locations with saline aquifers. The dissolution of CO2 into resident brines results in density-driven convection which further enhances the geological trapping potential. We report on the use of an analogue fluid pair to investigate density-driven convection in 3D in an unconsolidated bead pack. X-ray computed tomography (CT) is used to image density-driven convection in the opaque porous medium non-invasively. Two studies have been conducted that differ by the Rayleigh number (Ra) of the system, which in this study is changed by altering the maximum density difference of the fluid pair. We observe the same general mixing pattern in both studies. Initially, many high density fingers move downward through the bead pack and as time progresses these coalesce and form larger dominate flow paths. However, we also observe that a higher Rayleigh number leads to the denser plume moving faster towards the bottom of the system. Due to the finite size of the system, this in turn leads to early convective shut-down.
Date Issued
2017-08-18
Online Publication Date
2017-08-18
2017-09-25T13:32:40Z
Date Acceptance
2016-11-14
ISSN
1876-6102
Publisher
Elsevier
Start Page
4981
End Page
4985
Journal / Book Title
Energy Procedia
Volume
114
Copyright Statement
© 2017 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license
(http://creativecommons.org/licenses/by-nc-nd/4.0/).
(http://creativecommons.org/licenses/by-nc-nd/4.0/).
Source Database
manual-entry
Sponsor
Qatar Shell Research and Technology Center QSTP LLC
Qatar Petroleum
Grant Number
490000724
N/A
Source
13th International Conference on Greenhouse Gas Control Technologies, GHGT-13
Publication Status
Published
Start Date
2017-11-14
Finish Date
2016-11-18
Country
Lausanne