Identification

Title

Three-dimensional temporal imaging of X-ray CT imaging of dissolution-driven convection in glass beads

Abstract

The images in this dataset show the mixing of two liquid solutions in a random bead pack as a function of time and in three-dimensions. The working fluids used in this study are solutions of methanol and ethylene-glycol (MEG, fluid 1) and brine (fluid 2). In particular, three mixtures of ethylene-glycol and methanol were prepared that differ in wt% ethylene-glycol, namely 55 wt% (MEG55), 57 wt% (MEG57) and 59 wt% (MEG59). Measurements are conducted using in the regime of Rayleigh numbers, Ra = 2000-5000. X-ray Computed Tomography is applied to image the spatial and temporal evolution of the solute plume non -invasively. The tomograms are used to compute macroscopic quantities including the rate of dissolution and horizontally averaged concentration profiles, and enable the visualisation of the ow patterns that arise upon mixing at a spatial resolution of about (2x2x2) mm3. We observe that the mixing process evolves systematically through three stages, starting from pure diffusion, followed by convection-dominated and shutdown. A modified diffusion equation is applied to model the convective process with an onset time of convection that compares favourably with literature data and an effective diffusion coefficient that is almost two orders of magnitude larger than the molecular diffusivity of the solute. The comparison of the experimental observations of convective mixing against their numerical counterparts of the purely diffusive scenario enables the estimation of a non-dimensional convective mass flux in terms of the Sherwood number, Sh = 0.025Ra. We observe that the latter scales linearly with Ra, in agreement with observations from both experimental and numerical studies on thermal convection over the same Ra regime.

Resource type

nonGeographicDataset

Resource locator

http://www.bgs.ac.uk/ukccs/accessions/index.html#item118273

function: download

http://dx.doi.org/10.5285/f18a68bf-470f-48b7-91a1-9ea412fca419

function: download

Unique resource identifier

code

http://data.bgs.ac.uk/id/dataHolding/13607381

codeSpace

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Additional information source

Liyanage et al (in review) Multidimensonal observations of dissolution-driven convection in simple porous media using X-ray CT scanning to be submitted to Transport in Porous Media

Classification of spatial data and services

Topic category

geoscientificInformation

Keywords

Keyword set

keyword value

originating controlled vocabulary

title

GEMET - INSPIRE themes

reference date

date type

publication

effective date

2008-06-01

Keyword set

keyword value

Porosity

Carbon capture and storage

originating controlled vocabulary

title

BGS Thesaurus of Geosciences

reference date

date type

revision

effective date

2011

Keyword set

keyword value

NERC_DDC

Geographic location

West bounding longitude

East bounding longitude

North bounding latitude

South bounding latitude

Temporal reference

Temporal extent

Begin position

2016

End position

2017

Dataset reference date

date type

creation

effective date

2016

Frequency of update

notApplicable

Quality and validity

Lineage

The experiments have been conducted in a 3L acrylic plastic bowl packed with soda glass ballotini (dp = 0.5 mm, SiLibeads, supplied by VWR, UK). The bowl was scanned using a Universal Systems HD-350 X-ray CT scanner at an actual voxel (pixel) size of 0.47mm x 0.47mm x 2.0mm. The output images are in a proprietary dicom dataset format and include the metadata relating to the image acquisition scanner settings e.g. voxel size. The details of the sample preparation and fluid injection strategy can be found in Liyanage et al. Transport in Porous Media (in review). For image acquisition the following set of parameters was applied: field-of-view (24 x 24) cm2; energy level of radiation 120 eV; tube current 150 mA. Voxel size in the (x-y) plane is (0.4688 x 0.4688) mm2. For subsequent analysis, the latter are averaged over a 5 x 5 rectangular grid to produce (2.3 x 2.3 x 2) mm3 cubic voxels.

Conformity

Conformity report

specification

title

INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology

reference date

date type

publication

effective date

2011

degree

false

explanation

See the referenced specification

Conformity report

specification

title

Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services

reference date

date type

publication

effective date

2010-12-08

degree

false

explanation

See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF

Data format

name of format

Dicom

version of format

Constraints related to access and use

Constraint set

Limitations on public access

Constraint set

Limitations on public access

The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused.

Responsible organisations

Responsible party

organisation name

Qatar Carbonates and Carbon Storage Research Centre

email address

not available

responsible party role

author

Responsible party

organisation name

Qatar Carbonates and Carbon Storage Research Centre

email address

not available

responsible party role

pointOfContact

Responsible party

organisation name

Imperial College London

full postal address

London

United Kingdom

email address

not available

responsible party role

pointOfContact

Responsible party

organisation name

Imperial College London

full postal address

London

United Kingdom

email address

not available

responsible party role

principalInvestigator

Metadata on metadata

Metadata point of contact

organisation name

British Geological Survey

full postal address

The Lyell Centre, Research Avenue South

EDINBURGH

EH14 4AP

United Kingdom

telephone number

+44 131 667 1000

email address

enquiries@bgs.ac.uk

responsible party role

pointOfContact

Metadata date

2020-08-04

Metadata language

eng