Three-dimensional temporal imaging of X-ray CT imaging of dissolution-driven convection in glass beads
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.
INSPIRE
Identification
- File identifier
- 762484f0-e6f0-5eed-e054-002128a47908 XML
- Resource type
- nonGeographicDataset
Online resource
Resource identifier
- Metadata Language
- English (en)
Encoding
- Format
- Dicom
Projection
Classification of data and services
- Topic category
-
- Geoscientific information
Classification of data and services
Coupled resource
Coupled resource
Classification of data and services
Coupled resource
Coupled resource
Keywords
- GEMET - INSPIRE themes, version 1.0
- BGS Thesaurus of Geosciences
-
- Porosity
- NGDC Deposited Data
- Carbon capture and storage
- UKCCS
Temporal reference
Temporal extent
Temporal extent
- Dataset Reference Date ()
- 2016-07-18
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
Conformity
Conformity
Conformity
Conformity
- Explanation
- See the referenced specification
Restrictions on access and use
- Access constraints
- intellectualPropertyRights
- Access constraints
- 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.
- Access constraints
- Either: (i) the dataset is made freely available, e.g. via the Internet, for a restricted category of use (e.g. educational use only); or (ii) the dataset has not been formally approved by BGS for access and use by external clients under licence, but its use may be permitted under alternative formal arrangements; or (iii) the dataset contains 3rd party data or information obtained by BGS under terms and conditions that must be consulted in order to determine the permitted usage of the dataset. Refer to the BGS staff member responsible for the creation of the dataset if further advice is required. He / she should be familiar with the composition of the dataset, particularly with regard to 3rd party IPR contained in it, and any resultant use restrictions. This staff member should revert to the IPR Section (ipr@bgs.ac.uk ) for advice, should the position not be clear.
Responsible organization (s)
Contact for the resource
- Organisation name
- Qatar Carbonates and Carbon Storage Research Centre
- not available
- Organisation name
- Qatar Carbonates and Carbon Storage Research Centre
- not available
- Organisation name
- Imperial College London
- not available
- Organisation name
- Imperial College London
- not available
Responsible organization (s)
Contact for the resource
- Organisation name
- Qatar Carbonates and Carbon Storage Research Centre
- not available
- Organisation name
- Qatar Carbonates and Carbon Storage Research Centre
- not available
- Organisation name
- Imperial College London
- not available
- Organisation name
- Imperial College London
- not available
Metadata information
Contact for the metadata
- Organisation name
- British Geological Survey
- enquiries@bgs.ac.uk
- Metadata Date
- 2024-04-21
- Metadata Language
- English (en)