Østergaard, MB;
Zhang, M;
Shen, X;
Petersen, RR;
König, J;
Lee, PD;
Yue, Y;
(2020)
High-speed synchrotron X-ray imaging of glass foaming and thermal conductivity simulation.
Acta Materialia
, 189
pp. 85-92.
10.1016/j.actamat.2020.02.060.
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Abstract
Glass foams are attractive thermal insulation materials, thus, the thermal conductivity (λ) is crucial for their performance. Understanding the foaming process is critical for process optimization. Here, we applied high-speed synchrotron X-ray tomography to investigate the change in pore structure during the foaming process, quantifying the foam structures and porosity dynamically. The results can provide guidance for the manufacturing of glass foams. The 3D pore structures were also used to computationally determine λ of glass foams. We used the simulated λ to develop a new analytical model to predict the porosity dependence of λ. The λ values predicted by the new model are in excellent agreement with the experimental data collected from the literature, with an average error of only 0.7%, which performs better than previously proposed models.
| Type: | Article |
|---|---|
| Title: | High-speed synchrotron X-ray imaging of glass foaming and thermal conductivity simulation |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.actamat.2020.02.060 |
| Publisher version: | https://doi.org/10.1016/j.actamat.2020.02.060 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Glass foam, Thermal conductivity, 3D image analysis, Simulation, Porosity |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10093139 |
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