Multidimensional Imaging of Density Driven Convection in a Porous Medium

File Description SizeFormat 
1-s2.0-S1876610217318428-main.pdfPublished version778.56 kBAdobe PDFView/Open
Title: Multidimensional Imaging of Density Driven Convection in a Porous Medium
Authors: Liyanage, R
Crawshaw
Krevor
Pini, R
Item 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.
Issue Date: 18-Aug-2017
Date of Acceptance: 14-Nov-2016
URI: http://hdl.handle.net/10044/1/51134
DOI: https://dx.doi.org/10.1016/j.egypro.2017.03.1641
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/).
Sponsor/Funder: Qatar Shell Research and Technology Center QSTP LLC
Qatar Petroleum
Funder's Grant Number: 490000724
N/A
Conference Name: 13th International Conference on Greenhouse Gas Control Technologies, GHGT-13
Publication Status: Published
Start Date: 2017-11-14
Finish Date: 2016-11-18
Conference Place: Lausanne
Appears in Collections:Faculty of Engineering
Earth Science and Engineering
Chemical Engineering



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Creative Commons