1- Human Heart Medicine Applications Based on CFD
Prof. Dr. Dean Vucinic, BelgiumVesalius College (VeCo)
Vrije Universiteit Brussel (VUB)
Faculty of Electrical Engineering, Computer Science and Information Technology, University of Osijek, Croatia
Prof. Dr. Ir. Dean Vučinić, has joined Vesalius College (VeCo), which is affiliated to the Vrije Universiteit Brussel (VUB), as senior scientist and advisor in 2017. He has been affiliated to VUB since 1988. Before joining VeCo, he was guest professor and senior research scientist at the VUB Faculty of Engineering Sciences (IR) as member of two of its departments: Mechanical Engineering (MECH) and Electronics & Informatics (ETRO).
He is part-time associate professor at the Faculty of Electrical Engineering, Computer Science and Information Technology (FERIT), University of Osijek, holding the chair of Visual Computing.
His work is mostly related to Research and Development (R&D) projects, and his interest covers the topics of Scientific Visualization, Modelling and Simulation, Optimization methodologies and techniques, which are very often found together in solving complex problems within the multidisciplinary engineering and computer science domains.
His Ph.D. thesis became a book in 2010, ISBN 978-3-8383-3500-1. In the early 90's he developed "CFView - Computational Field Visualization System", the first-time-ever interactive visualization software adapted to numerical simulation solvers, completely based on the object-oriented technology, and fully implemented in C++. It has to be noted that VUB spin-off NUMECA is still using his software after more than 20 years, and in addition, more than 20 VUB PhD-s applied CFView in their visualization and data analysis tasks.
During almost 30 years at VUB, he successfully participated in more than 20 European projects under the European Frameworks, EUREKA/ITEA and Tempus educational programs.
He is author of more than 50 scientific papers in international reviewed journals and conference proceedings, and in addition, author of several book chapters.
He is member of International Advisory Boards and Scientific Committees of Journals and Conferences, acting as chair, session organizer, reviewer and editor of respective papers proceedings.
Due to his international presence, he is promoting and encouraging international cooperation in research and development, and education, just mentioning some of the realized initiatives with USA, Canada, Russia, Brazil, India and Japan, among others.
He is the European Commission expert in H2020 and member of international organizations as follows: AIAA, IEEE, ACM, SAE & ASME.
2- Repair and Maintenance of Density Profile in a Salinity Gradient Solar Pond
Prof. Dr. Aliakbar Akbarzadeh, AustraliaAliakbar Akbarzadeh received his Ph.D. in Mechanical Engineering from University of Wyoming in USA(1975).
He has worked as an academic at Pahlavi (Shiraz) University, University of Melbourne, UC Berkeley, and RMIT University in Melbourne Australia.
At present Aliakbar is a Professor in the School of Aerospace, Mechanical, and Manufacturing Engineering and also the Leader of the Energy Conservation and Renewable Energy Group.
He has been the first supervisor of about 40 PhD candidates to completion.
He has over 100 refereed publications and three books.
Aliakbar who is a thermodynamicist has been working for the last 30 years on salinity gradient solar ponds as a source of industrial process heat and at present his research team is world leader on industrial applications of solar ponds.
In the past 10 years he has been working on applications of thermoelectric generators for power generation from waste heat and renewable sources, as well as thermal energy storage systems .
3- From Cavitation to Bubble
My fundamental research work started from the cavitation phenomenon in hydraulic components, such as pump and valve.
The cavitationin hydraulic componentscausesmanyundesirable effects, for example noise, vibration and cavitation erosion.
I did experiments to know the relations between the component’s structural parameters and noise.
By high speed photography, I got the details how the cavitation evolves in hydraulic components. Some innovations were proposed and tested by experiments.
In order to prevent the cavitation, the structure of the hydraulic component became more and more complex.As we know, the cavitation inception is because of the expansion of nuclei in the fluid medium.
I investigated a special kind of nuclei “antibubble”, how to generate it, collapse it, and control its life.Also I studied how the air get into the liquid to form the bubble.
I found something interesting during the drop impact the liquid surface.
Prof. Dr. Jun Zou, ChinaEducation:
09/1995..06/2000: B.S., Zhejiang University, Hangzhou, China.
9/2001..09/2006: Ph.D., Zhejiang University, Hangzhou, China.
12/2006..12/2008 Assistant Professor, Department of Mechanical engineering, Zhejiang University 01/2009..12/2013 Associate Professor, Department of Mechanical engineering, Zhejiang University
04/2012..05/2014 Visiting Professor, Department of Mechanical engineering, University of Minnesota at twin city, MN
01/2014..present Professor, Department of Mechanical engineering, Zhejiang University
Award and Honors:
09/2011 Distinguished Young Scholar of Zhejiang University.
01/2013 Excellent Youth Scholars of National Natural Science Foundation of China.
01/2015 Distinguished Young Scholars of Natural Science Foundation of Zhejiang Province.
01/2017 Changjiang Youth Scholars of the Ministry of Education of China.
Present Interests of Research:
● Bubble dynamics and Cavitation
● Droplets and jets
● Granular matter
● Soft robotics
4- Heat and Mass Transfer under Supersaturated Frosting Conditions
Field observations of the operation of industrial freezers indicate that many are improperly designed as evidenced by large amounts of snow-like formations on the freezer coil and on the walls and ceiling of the freezer itself.
These formations result from the presence of ice fog inside the freezer, which is tied to the presence of supersaturated air in the freezer.
This condition is more likely to exist at lower air temperatures since the moisture carrying capacity of the air is significantly reduced at those temperatures.
As the moisture level rises beyond the saturation amount, the excess moisture can only exist in the form of suspended liquid droplets or suspended ice crystals, depending on whether the temperature is above or below the freezing point of water, respectively.
The significance of the presence of air-borne ice crystals in the vicinity of cold surfaces is that they tend to deposit on those surfaces in a predominantly convection-driven process and at a pace commensurate with the amount and speed of the suspended particles.
This mechanism is usually coupled with a diffusion-driven mechanism due to the humidity ratio difference between the bulk air and the air in the vicinity of the cold surface.
Formations resulting from the convection-driven mechanism have been observed to cause degradation in the coil heat transfer performance at significantly faster rates than those formations associated with the diffusion-driven mechanism.
Experimental evidence also suggests a larger defrost energy penalty in the case of accumulations associated with suspended ice crystals.
This lecture reports on results of a multiyear investigation at the Wayne K. and Lyla L. Masur HVAC Laboratory at the University of Florida of industrial freezer performance under ice foggy conditions.
The lecture is supported by video and still images of formations of the types described above as well as of iced-up coils during defrosting.
We wanted to determine the relationship between those formations and the prevailing freezer conditions.
We also wanted to search for a demarcation line between snow-like formations and the more traditional formations and to correlate the findings with those predicted using psychrometric theory.
We have developed new psychrometric charts that can be used for supersaturated moist air at freezer temperatures. The new body of data generated from this study should help the refrigeration engineer and the industrial freezer operator to avoid ice foggy freezer operation and thus reduce the frequency, duration, and energy penalty of the defrost cycle.
Prof. Dr. S.A. Sherif, USA
Professor of Mechanical and Aerospace Engineering
Director Industrial Assessment Center
Director Wayne K. and Lyla L. Masur HVAC Laboratory
University of Florida
232 MAE-B Building, P.O. Box 116300
Gainesville, FL 32611-6300, USA
Dr. S.A. Sherif is a tenured Professor of Mechanical and Aerospace Engineering and is the Founding Director of the Wayne K. and Lyla L. Masur HVAC Laboratory and the Director of the Industrial Assessment Center.
He served as Co-Director of the Southeastern Center for Industrial Energy Intensity Reduction at the University of Florida (2009-2013).
He is a Fellow of ASME, a Fellow of ASHRAE, an Associate Fellow of AIAA, a Member of Commission B-1 on Thermodynamics and Transfer Processes of the International Institute of Refrigeration, a Member of the Advisory Board of Directors of the International Association for Hydrogen Energy, and a NASA Faculty Fellow. He served as the 2013-2014 Chair of the ASME Heat Transfer Division Executive Committee (2009-2016) and a member of the ASME’s Basic Engineering Group Operating Board (2010-2014).
He is also a past chair for the ASME Advanced Energy Systems Division, the K-19 Committee on Environmental Heat Transfer of the ASME Heat Transfer Division (2003-2007), the Coordinating Group on Fluid Measurements (1992-1994) and the Fluid Applications and Systems Technical Committee (2008-2010) of the ASME Fluids Engineering Division.
He also served as a past chair of the Steering Committee of the Intersociety Energy Conversion Engineering Conference (2001-2003), ASHRAE’s Standards Project Committee 41.6 on Measurement of Moist Air Properties (1989-1994), and ASHRAE’s TC1.1 Committee on Thermodynamics and Psychrometrics (2012-2013).
He also served as a member of the ASME’s Energy Resources Board (2001-2003) and was the Board’s representative to the ASME’s International Mechanical Engineering Congress Committee (2003-2006).
He was the Head of the Refrigeration Section of ASHRAE (2004-2008), the Technical Conference Chair of the 2008 ASME Summer Heat Transfer Conference, a member of the ASME Frank Kreith Energy Award Selection Committee (2005-2011), and the General Conference Chair of the 2013 ASME Summer Heat Transfer Conference.
He is Technical Editor of the ASME Journal of Thermal Science and Engineering Applications (2014-2019), a Subject Editor of Solar Energy (2004-present), and a Subject Editor Emeritus of the International Journal of Hydrogen Energy (2011-present).
He is a past Associate Technical Editor of the ASME Journal of Heat Transfer (7/2007-7/2011) and the ASME Journal of Thermal Science and Engineering Applications (2011-2014). He is also a past Subject Editor of the International Journal of Hydrogen Energy (5/2005-12/2010).
He is a member of the Editorial Boards of 22 thermal science journals.
He is the recipient of the E.K. Campbell Award of Merit from ASHRAE in 1997 for “outstanding service and achievement in teaching” and a “TIP” teaching award from the University of Florida in 1998.
He is the recipient of the 2001 Kuwait Prize in Applied Sciences, a Heat Transfer Division 75th Anniversary Medal (2013), an ASHRAE Distinguished Service Award (2003), an ASHRAE Exceptional Service Award (2010), two Best Paper Awards, one from AIAA (2005) and another from ASME (2005), and numerous certificates of appreciation from ASME, AIAA, ASHRAE, and NASA.
In 2007, he received a Superior Accomplishment Award from the University of Florida and in 2008 was elected as an ASHRAE Distinguished Lecturer.
Dr. Sherif has over 400 refereed publications and two US patents and is the primary editor of the CRC/Taylor & Francis Handbook of Hydrogen Energy.
5- Computational Models for Hydrodynamics and Kinetics of Minerals Flotation Machines- A Review
Prof. Dr. Saad Ragab, USAProfessor
Engineering Science and Mechanics Department, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
Direct and large eddy simulations of turbulence, hydrodynamic stability and transition, computational fluid dynamics, aerodynamics, gas dynamics and heat transfer, naval hydrodynamics, free-surface flow, hydrodynamic design using CFD, and optimization techniques.
1979: Ph.D.,Engineering Mechanics, Virginia Polytechnic Institute and State University
1974: M.S., Aeronautical Engineering, University of Cairo, Egypt
1970: B.S., Aeronautical Engineering, University of Cairo, Egypt
6- Computational Mechanics with Meshless Methods
The structure of a novel meshless solution procedure for calculation of solid and fluid mechanics problems, coupled with the electromagnetic fields, is presented.
The multiphysics solution framework is coupled to multiple scales by incorporating the cellular automata and the phase-field concepts of microstructure evolution.
The solution procedure is defined on a set of nodes which can be non-uniformly distributed.
The domain and boundary of interest are divided into overlapping influence areas.
On each of them, the fields are represented by the collocation with radial basis functions or by least squares approximation on a related sub-set of nodes present in the influence area.
In the case of cellular automata modelling, the transition rules are defined for the states of the set of nodes in the influence area.
The timestepping is performed in an explicit way.
All governing equations are solved in their strong form, i.e no integrations are performed.
The polygonisation is not present.
The large deformation and growth problems are handled by node redistribution and activation of additional nodes, respectively.
The solution procedure can be easily and efficiently adapted in node redistribution and/or refinement sense, which is of utmost importance when coping with fields exhibiting sharp gradients such as phase field variable or enthaply in phase-change problems.
Step by step benchmarking of the method is represented, followed by some large scale industrial examples such as the grain structure formation in continuous casting of steel, turbulence modelling with solidification, electromagnetic casting of aluminium alloys, etc.
The results of the new approach are compared with the analytical solutions, well documented bench-mark solutions and commercial packages.
The method is extremly simple to code and accurate, allowing straightforward parallelization.
Besides this, the inclusion of complicated physics can be performed in a straightforward manner, reducing the developement time.
The coding in 2D or 3D is almost identical.
Applications to several large scale industrial problems are shown, particularly in the field of thermomechanical processing of steel and aluminum alloys. A selection of related representative references of the team is given.
Prof. Dr. Božidar ŠarlerEDUCATION AND AFFILIATIONS
RESEARCH FIELD AND ACHIEVEMENTS