Mr Guanzhe Cui joined the group

Mr Guanzhe Cui has just started his Master of Philosophy (MPhil) program in March, 2017, and he will work on numerical simulations of multi-component flow in porous media based on Lattice Boltzmann method (LBM). Guanzhe graduated with Master of Architecture and Civil Engineering from School of Civil Engineering and Mechanics at Kunming University of Science and Technology, China in 2016.

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Paper accepted (Fusion Eng. Des.) on effective thermal conductivity

Title: Influence of gas pressure on the effective thermal conductivity of ceramic breeder pebble beds

Author(s): Weijing Dai, Simone Pupeschi, Dorian Hanaor, Yixiang Gan

Fusion Engineering and Design, in press. [DOI][PDF:045_FED_2017]

Figure: Gas pressure related size dependency of the contact units.

Abstract: Lithium ceramics have been considered as tritium breeder materials in many proposed designs of fusion breeding blankets. Heat generated in breeder pebble beds due to nuclear breeding reaction must be removed by means of actively cooled plates while generated tritiums is recovered by purge gas slowly flowing through beds. Therefore, the effective thermal conductivity of pebble beds that is one of the governing parameters determining heat transport phenomenon needs to be addressed with respect to mechanical status of beds and purge gas pressure. In this study, a numerical framework combining finite element simulation and a semi-empirical correlation of gas gap conduction is proposed to predict the effective thermal conductivity. The purge gas pressure is found to vary the effective thermal conductivity, in particular with the presence of various sized gaps in pebble beds. Random packing of pebble beds is taken into account by an approximated correlation considering the packing factor and coordination number of pebble beds. The model prediction is compared with experimental observation from different sources showing a quantitative agreement with the measurement.

Keywords: effective thermal conductivity; ceramic breeding materials; pebble beds; granular materials; gas pressure

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Ms Yongmei Zhang joined the group

Ms Yongmei Zhang has just started her PhD program in March, 2017, and she will work on the mechanics of interfaces. Yongmei graduated with Master of Engineering in Solid Mechanics from the School of Aerospace, Xi’an Jiaotong University, China in 2016.

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PostDoc Opening in Carbon Storage

A postdoctoral research associate in carbon storage has been advertised in the School of Civil Engineering, Faculty of Engineering and IT at the University of Sydney. The official advertisement by The University of Sydney can be found via https://goo.gl/wqsvLl

The Postdoctoral Research Associate will undertake a project funded by the Australian Research Council on CO2 storage, named “Assessing reservoir performance for carbon storage in saline aquifers.” The Chief Investigators include A/Professor Luming Shen, Dr Federico Maggi, Dr Yixiang Gan, Professor Abbas El-Zein, Dr Zhejun Pan.


The project aims at developing and testing a modelling framework to assess the injectivity, storage capacity, and containment of supercritical CO2 injected in deep saline aquifers.The project broadly covers multiphase flow in porous/fractured geological materials, and emphasizes physical, hydraulic, and geomechanical processes at multiple spatial and temporal scales. The project is expected to provide a validated computational framework that can be used by stakeholders to improve analysis and assessment of reservoir performance under various scenarios of CO2 injection operations and boundary environmental conditions. This opening is fundamentally based on the development of advanced computational frameworks but it is part of a greater effort that also involves in-situ data collection and experimental laboratory tests conducted by other participants to this project. The project is led by A/Prof Luming Shen in the School of Civil Engineering at the University of Sydney, and involves the collaboration of the Commonwealth Scientific and Industrial Research Organization (CSIRO) in Australia.

 

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ModVal14, Karlsruhe, Germany

From 2-3 March, 2017, Dr Gan attended the 14th Symposium on Fuel Cell and Battery Modeling and Experimental Validation (ModVal14), Karlsruhe, Germany. In the conference, the recent work in the research group on “Universality of the emergent scaling in finite random binary percolation networks” was presented.

The presentation slides can be viewed and downloaded via:

2017_Gan_ModVal14_s

 

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Paper accepted (PLOS ONE) on RC networks

Title: Universality of the Emergent Scaling in Finite Random Binary Percolation Networks

Author(s): Chongpu Zhai, Dorian Hanaor, Yixiang Gan

PLOS ONE, in press. [DOI:10.1371/journal.pone.0172298]

Figure: (Left) A lattice network containing randomly distributed resistors and capacitors; (Right) Normalised admittance module as a function of frequency.

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Visitors from KIT

Mr Simone Pupeschi and Mrs Marigrazia Mascardini are visiting us from Karlsruhe Institute of Technology (KIT), Germany from Jan to April, 2017. They have previously visited us in 2015, with the photo attached from their last visit. 

Simone and Mari are two final-year PhD students at KIT and have been working on thermo-mechanical behaviour of tritium breeder materials under extreme loading conditions (high temperature and neutron irradiation) for nuclear fusion reactors (i.e., ITER and Fusion for Energy projects). 

Photo from a Thai dinner taken on 1/2/2017, from left: Simone, Ratna, Yixiang, Mari and Simon.

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Inaugural Sydney Research Accelerator (SOAR) Fellows launch

Last week, Dr Gan attended the launch event of the Inaugural Sydney Research Accelerator (SOAR) Fellows. The fellows from the University’s new Sydney Research Accelerator (SOAR) program came together last week for a networking morning tea with the Vice-Chancellor, Dr Michael Spence, and Deputy Vice-Chancellor (Research), Professor Duncan Ivison.

In its first year, the program will enable 10 early-career and 10 mid-career researchers to further their research in important areas such as preventing melanoma, preparing for the next global pandemic, building more powerful batteries for electric cars and helping those from disadvantaged backgrounds access education.

Group photo (from left): Deputy Vice-Chancellor (Research) Professor Duncan Ivison with SOAR Fellows Associate Professor Xiaoke Yi, Associate Professor Karl Maton, Dr Yixiang Gan, Associate Professor Chris Ling, Dr Wojciech Chrzanowski, Associate Professor Tara Murphy, Dr Stefanie Schurer, Dr Jane Lê, Associate Professor Paulo Ferreira, Associate Professor Michael Valenzuela, Associate Professor Anne Cust, Associate Professor Susan Park, Associate Professor Anika Gauja.

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A few photos from the event (1/12/2016).

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IWMEM2016 workshop

International Workshop on Mechanics of Energy Materials (IWMEM2016) has been successfully hosted at The University of Sydney, 14-15 November, 2o16.

The workshop contained 22 presentations, regarding a wide range of research on challenging engineering problems in energy systems, and 40 participants from Germany, China, India, USA and Australia. After the presentations, an open discussion session has been carried out for variety of questions faced in the current trends in energy systems, and the plan to host the next IWMEM in Suzhou, China, 2017.

The group photo is taken in front of The University of Sydney Quadrangle.

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Also, there are some photos during our open discussion sessions:

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Mingchao awarded Endeavour Research Fellowship

Our previous visiting PhD student, Mr Mingchao Liu,from Tsinghua University has been awarded with Endeavour Research Fellowship from Australian Government. This prestige fellowship will support him to conduct a six-month research project at The University of Sydney in 2017.

Congratulations to Mingchao.

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More details about Endeavour Scholarships and Fellowships (link):

The Endeavour Scholarships and Fellowships are the Australian Government’s competitive, merit-based scholarships and fellowships providing opportunities for Australians to undertake study, research or professional development overseas and for overseas citizens to do the same in Australia.

The Endeavour Scholarships and Fellowships build Australia’s reputation for excellence in the provision of education and research, support the internationalisation of the Australian higher education and research sectors and offer high-achieving Australians opportunities to increase their knowledge and expertise in their field.

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