Jianfu Zhao
Institute of Mechanics, Chinese Academy of Sciences
Dr. Jian-Fu ZHAO is a professor and the director of the group of microgravity multiphase fluid thermal dynamics, CAS Key Laboratory of Microgravity, Institute of Mechanics, Chinese Academy of Sciences (CAS). He received his B. Sc. degree from Tsinghua University in 1990, M. Sc. degree from Zhejiang University in 1993, and Ph. D. degree from Wuhan University of Hydraulic and Electric Engineering (presently Wuhan University) in 1998. He has been involved in several space experiments aboard the Russian space station MIR and the Chinese recoverable satellites. He is also closely joined in many projects as a principal investigator for ground-based microgravity experiments utilizing the Drop Tower Beijing, the Russian IL-76 reduced gravity plane, and so on. He is also very active in academic exchanges and cooperation both at home and abroad. He is serving as an Associate-Editor of Microgravity Sciences and Technology and member of editorial boards of several national and international journals. He is also serving as a member of two expert committees relevant with the China Manned Space Engineering (CMSE), a member of the Executive Council of Chinese Society of Space Research (CSSR), the President of the National Society of Microgravity Science and Application (NSMSA/CSSR), a member of several committees of other national societies, Chair/Co-Chair and/or member of Orginazing/Scientific Committee for several national/international academic conferences, and so on.
Topic: Bubble Dynamics in Microgravity Nucleate Pool Boiling
Introduction:
Boiling is one of the most effective methods of heat transfer, which is employed widely in component cooling and in various energy conversion systems in normal gravity on the ground, and will be a potential candidate with significant advantages in microgravity environment in space. Due to large difference between the densities of the liquid and its vapor, bubble dynamics, flow structures and heat transfer performances of boiling in different gravity conditions exhibit distinct difference. The applicability of common-used correlations, e.g. the Rohsenow correlation for nucleate pool boiling, diminishes quickly to reduced gravity conditions. On the other hand, microgravity environment aboard spacecraft provides a basic scene in which the effects of gravity are suppressed, and then be conductive to revealing of the mechanism underlying the phenomena with enlarged space and time scales related to bubble growth process. The present lecture will provide a summary on the study of bubble dynamics in microgravity nucleate pool boiling, which mainly obtained from 3 space flight experiments aboard Chinese recoverable satellites RS-22, SJ-8 and SJ-10, from ground-based short-term microgravity experiments in the Drop Tower Beijing, and numerical simulations by using the continuum medium model and the Lattice Boltzmann method. Some new findings relevant with the project vgBOILING will be reported and discussed, too. The project vgBOILING is one of the first batch of scientific experiment tasks aboard the China Space Station (CSS), which is scheduled to be sent to the CSS by the cargo spacecraft Tianzhou-5 in the autumn. The space experiments will be conducted in the Varying Gravity Experimental Rack (VGER) inside the Experimental Module I, namely Wentian, of the CSS.
Raffaella Ocone
Heriot-Watt University
Raffaella Ocone obtained her first degree in Chemical Engineering from the Università di Napoli, Italy and her MA and PhD in Chemical Engineering from Princeton University, USA. She holds the Chair of Chemical Engineering in the School of Engineering and Physical Sciences at Heriot-Watt University (HWU) since 1999. She is a Fellow of the Royal Academy of Engineering (RAEng), the Royal Society of Edinburgh (RSE), the Institution of Chemical Engineers (IChemE), and the Royal Society of Chemistry. In 2007 she was appointed Cavaliere (Knight) of the Order of the Star of Italian Solidarity by the President of the Italian Republic. In The Queen’s 2019 New Year Honours she was appointed Officer of the British Empire (OBE) for services to engineering. Recently she has been announced as one of the top 100 Most Influential Women in the Engineering Sector. The list, produced by board appointments firm Inclusive Boards in partnership with the Financial Times, includes senior leaders from top engineering firms such as Amey, Arup, BAE Systems, and Laing O’Rourke.
Raffaella has taken a leading role in debating the role that ethics plays in engineering and the future of energy supply and its relation to climate change. She has featured on a number of public events including a Panel discussing greenhouse gas removal and the associated technologies at the Global Grand Challenge Summit 2019 organised jointly by the Royal Academy of Engineering (RAEng), the Chinese Academy of Engineering (CAE), and the National Academy of Engineering (NAE). In October 2019, Raffaella also featured in a Panel organised by the RSE at the Festival of Politics at the Scottish Parliament debating whether efforts to improve public knowledge of female scientists are working and spoke at a Panel on “Scotland’s Energy Future: No Easy Options”. The Panel was held as a fringe event organised by the RSE at the SNP Congress in Aberdeen in October 2019. The panel addressed the key themes from the recent RSE inquiry into Scotland’s Energy Future and debated how best Scottish energy policy can meet the competing challenges.
At HWU, Raffaella is the Head of the Multiphase Multiscale Engineering Modelling (MMEM) research group. Raffaella has worked in a number of highly recognised international Institutions such as the Università di Napoli (Italy); Claude Bérnard Université, Lyon (France); Louisiana State University (USA); Princeton University (USA). She was the first “Caroline Herschel Visiting Professor” in Engineering at RUHR Universität, Bochum, Germany (July-November 2017) and the recipient of a Visiting Research Fellowship from the Institute for Advanced Studies, Università di Bologna, Italy (March-April 2018). Raffaella’s main area of research is in the field of modelling complex (multi-phase) reactive systems. Currently she is the EPSRC Established Career Fellow in Particle Technology.
Rachael Smith
Rachael Smith completed her BEng in Chemical Engineering at the University of Queensland, Australia, in 2000, and her PhD in Chemical Engineering from the University of Queensland in 2008. She joined the department of Chemical Engineering at Monash University in Melbourne, Australia as a post-doctoral research fellow in 2008. In February 2012 She joined the department of Chemical and Biological Engineering at the University of Sheffield as a lecturer. She is interested in the study of particulate systems in industries including pharmaceuticals, foods, detergents, biological processing and water, using a combination of experimental and computational simulation tools. Rachael Smith is also a founding member of the Pharmaceutical Engineering Interest Group. Her research interests are Wet granulation design and scale-up, DEM/CFD modelling of particulate processes, drug delivery methods, biological and water systems modelling.
Personal page: https://www.sheffield.ac.uk/cbe/people/academic-staff/rachel-smith.
Bofeng Bai
State Key Laboratory of Multiphase Flow in Power Engineering
Xi’an Jiaotong University
Prof. Baofeng Bai, his research is mainly carried out on the basic theory of orderly energy transformation, multi-phase flow theory of crude oil extraction, high specific energy Breton circular power generation technology, and solid hair jet tube multi-phase flow technology. He got bachelor degree from Xi'an Jiaotong University in 1993, majoring in fluid machinery, and obtained PhD in Power Engineering and Engineering thermophysics in 1999. Presently, he is a second-class professor, doctoral supervisor and leading scholar of Xi'an Jiaotong University. Currently, he is a council member of Chinese Society of Engineering Thermophysics, Deputy Secretary General of the Heat Exchange Equipment Branch Committee of China Boiler Pressure Vessel Standard Committee, and Vice Chairman of the Safety and Energy Efficiency Committee of Heat Exchange. For “Honor”, in 2014, He obtained “The National Science Foundation for Distinguished Youth Project”. It refers to the highest honor for young scientist in China. In 2017, Prof. Bai got the National "10,000 Talents Plan" scientific and technological innovation leaders. For “Awards, won 1 second prize of national technological invention, 2 first prizes of provincial and ministerial science and technology awards, and 4 awards at other provincial and ministerial levels. He served as the deputy editor of JMES (Journal of Mechanical Engineering and Sciences, Proceeding of the British Institution of Mechanical Engineers), and Measurement, Measurement: Sensors, and the editorial board of four Chinese academic journals including Computational Physics and Weapon Equipment Engineering. For achievements, long-term thermal physics theory and application technology research include the high temperature gas-liquid mixing organization method applied to weapon new concept engine in China; high-speed air-liquid mixed airflow total temperature probe technology is applied to the high-altitude test bench; and energy efficiency evaluation method of heat exchanger are used as national standards and specifications and adopted by national policies. Strengthen key projects, equipment pre-research projects, two-machine special projects, etc. In short, Prof. Bai has published more than 300 papers in Chinese and English journals, participated in 4 industry manuals, authorized more than 20 invention patents.
Topic: Supercritical fluids turbulence: progress and perspectives
Introduction:
A supercritical fluid is any substance at a temperature and pressure above its critical point. At this condition, distinct liquid and gas phases do not exist. A transition from a liquid-like to a vapour-like substance occurs continuously in a certain region (i.e. pseudo-critical region), and the thermal-physical properties vary significantly in this region. Turbulent heat transfer is vitally important for the design and optimization of systems and devices in energy utilization and conversion. Unfortunately, developing appropriate turbulence models for supercritical fluids turbulence is still difficult. In this presentation, we introduce the progress and perspectives of supercritical fluids turbulence, including the open issues and our progress on fundamental and modelling theory of turbulent heat transfer, structures and dynamics of supercritical mixing layers. This presentation consists of five parts, including the research background and scientific issues of supercritical fluids turbulence, direct numerical simulation methodology, turbulent fundamentals, turbulent mixing layer, and turbulence modelling theory.
