student profile: Mr Weijing Dai


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Thesis work

Thesis title: Effective thermal conductivity of compacted granular materials

Supervisors: Dorian HANAOR, Yixiang GAN

Thesis abstract:

Granular materials are defined as the materials that constituted by powders, grains, piles and other discrete particulates, which are considered as composites and mixtures in terms of chemical formation. The application of granular materials covers many traditional industries and emerges in the rapid development of energy technologies. Thus the understanding of the thermal properties of granular materials is the key issue. Effective thermal conductivity is one of the most important properties to evaluate these thermal applications. Because of the heterogeneous nature and discrete structure of granular materials, the effective thermal conductivity of these materials is not only determined by the intrinsic thermal conductivities of the constituents and inter-phases, but also affected by the packing structure inside the particulate system, contact interaction between particles, and external factors like mechanical state, electrical fields, and temperature. Therefore, a comprehensive understanding of the effective thermal conductivity of granular materials should clarify the correlation between the effective thermal conductivity and the parameters of the materials, and introduce explicit routes to adjust the effective thermal conductivity by the control of the changeable parameters. To cover these two objectives in this research, the effective thermal conductivity will be studied both theoretically and experimentally. 

Selected publications

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Journals

  • Dai, W., Pupeschi, S., Hanaor, D., Gan, Y. (2017). Influence of gas pressure on the effective thermal conductivity of ceramic breeder pebble beds. Fusion Engineering and Design, 118, 45-51. [More Information]

Conferences

  • Dai, W., Gan, Y. (2017). Measurement of effective thermal conductivity of compacted granular media by the transient plane source technique. Powders & Grains 2017 - 8th International Conference on Micromechanics on Granular Media, France: EDP Sciences. [More Information]
  • Dai, W., Gan, Y., Hanaor, D. (2016). Effective thermal conductivity of submicron powders: A numerical study. The 2nd Australasian Conference on Computational Mechanics (ACCM 2015), Switzerland: Trans Tech Publications. [More Information]

2017

  • Dai, W., Pupeschi, S., Hanaor, D., Gan, Y. (2017). Influence of gas pressure on the effective thermal conductivity of ceramic breeder pebble beds. Fusion Engineering and Design, 118, 45-51. [More Information]
  • Dai, W., Gan, Y. (2017). Measurement of effective thermal conductivity of compacted granular media by the transient plane source technique. Powders & Grains 2017 - 8th International Conference on Micromechanics on Granular Media, France: EDP Sciences. [More Information]

2016

  • Dai, W., Gan, Y., Hanaor, D. (2016). Effective thermal conductivity of submicron powders: A numerical study. The 2nd Australasian Conference on Computational Mechanics (ACCM 2015), Switzerland: Trans Tech Publications. [More Information]

Note: This profile is for a student at the University of Sydney. Views presented here are not necessarily those of the University.