1987 - 1991 : M.Sc. Applied Mathematics, Twente University
(Prof. P.J. Zandbergen & Dr. B.H. Gilding)
1991 - 1996 : Ph.D Physics & Astronomy, Utrecht University
(Prof. W.P.M De Ruijter & Prof. H.A. Dijkstra)
English (fluent)
German (working professional, actively upgrading to fluent)
Swedish (fluent)
Dutch (fluent, native)
1996 - 1998 : PostDoc VU (Free University of Amsterdam),
Faculty of Earth Sciences, Marine and Sedimentary Geology
1998 - 2000 : Advisor / Researcher at Delft Hydraulics,
section Marine and Estuarine Systems
2000 - 2005 : Researcher, Philips Research The Netherlands (Nat.Lab.),
Software Architectures Group
2005 - 2008 : Research Scientist, ABB Corporate Research Västerås - Sweden
2008 - 2010 : Senior Scientist, ABB Corporate Research Västerås - Sweden
2010 - 2013 : Principal Scientist & Power Transformer Global Architecture Team member, ABB Corporate Research Västerås & ABB Power Products / Transformers (PPTR) - Sweden
2013 - 2014 : Team Leader PPTR Technology Centre @ Corporate Research ABB Power Products / Transformers - Sweden
2014 - now : Principal Scientist & Power Transformer Global Architecture Team member, ABB Power products / Transformers Bad Honnef - Germany
Global R&D, Strategy & Roadmap development, Technology Transfer, Transformer design, Design optimization, Design Reviews, Computational Physics (CFD & Thermo-hydrodynamic network models), Fluid Dynamics, Heat Transfer, Mass Transfer, Technology Management, Reduced-Order modeling, Standardization, Standards Development, Customer Support (external & internal), Project Assessment (>10, Gate Model), Software Engineering, Special Education, Student Counseling, Electronics Hardware Design, Digital Electronics, Microcontrollers & Sensor Applications
2007 : Patent WO-2007069207 (together with W. van der Linden, W. Baks, M. Bodlaender)
2013 : Patent Filing (SE-1318901) (together with T. Laneryd, R. Bel Fdhila, A. Gustafsson)
2008 - 2013 : Representing ABB in CIGRE Working Group A2.38 (Transformer Thermal Modeling)
2012 - now : Reviewer, IEEE Transactions on Power Systems / Power Delivery
First author (Kranenborg et al.):
Double-diffusive Flow Patterns in the Unicellular Flow Regime: Attractor Structure and Flow Development, in: Double-Diffusive Convection, AGU Geophysical Monograph 94, eds: Fernando & Brandt, pp. 89-96, 1995.
The structure of (linearly) stable double diffusive flow patterns in a laterally heated stratified liquid, Phys. Fluids 7(3), pp. 680-682, 1995.
On the evolution of double-diffusive intrusions into a stably stratified liquid: A study of the layer merging process, Int. J. Heat Mass Transfer 41, 2743-2756, 1998.
Double diffusive layer formation near a cooled liquid-solid boundary, Int. J. Heat Mass Transfer 41, 1873-1884, 1998.
Numerical Study on Mixed Convection and Thermal Streaking in Power Transformer Windings, EuroTherm2008, 5th European Thermal-Sciences Conference, Eindhoven, The Netherlands, 2008
Co-author:
A bifurcation study of double diffusive flows in a laterally heated stably stratified liquid layer, Int. J. Heat Mass Transfer 39, 2699-2710, 1996 (with H.A. Dijkstra).
On the evolution of double-diffusive intrusions into a stably stratified liquid: the physics behind self-propagating layers, Int. J. Heat Mass Transfer 41, 2113-2124, 1998 (with H.A.Dijkstra).
Layer formation in double diffusive convection (overview article), in: Time-dependent Nonlinear Convection (Advances in Fluid Mechanics), ed: P.A. Tyvand, Computational Mechanics Publications, pp. 139-176, 1998 (with H.A. Dijkstra and J. Molemaker).
Modelling grain-size distributions. A comparison of two models and their numerical solution, Tectonophysics, 320, 347--374, 2000. (with T. Den Bezemer, H. Kooi and S. Cloetingh).
Thermal modeling of power transformer radiators using a porous medium based CFD approach, THERMACOMP 2011, Dalian, China, 2011
Biotemp® Transformers in the Modern Substation, CIGRE International Colloquium Transformer Research and Asset Management, Zagreb, May 2012
CFD study of non-guided laminar mixed convection of a high Prandtl number fluid in a transformer winding-like geometry, International Heat Transfer Conference, IHTC 15, Japan, 2014
Hot Spot Determination in Transformer Windings through CFD Analysis, CIGRE WorkSpot VII Conference, Rio de Janeiro, Brazil, 2014
2013 : Mattia Montanari (CRNS Nantes, France): Multi-physics CFD-based Reduced-Order Modeling Approaches Using Commercial Codes
2012 : Yuhe Jiao (KTH Stockholm): CFD Study on the Thermal Performance of Transformer Disc Windings Without Oil Guides
2011 : Maria Hjalmars (KTH Stockholm): Optimization Study on Oil Flow and Temperature Distribution in Power Transformer Windings Using Global Optimization Methods
Microcontroller network concept : Proprietary network architecture combining power delivery and intelligent (battery-less) node communications using non-polarized two-wire connections (link)
Technology & School : Introduction of modern electronics (microcontrollers) in primary schools
- Experience - My work has centered on heat and mass transfer related problems, ranging from practical aspects (customer contacts, product design, design architecture and process, standards improvements, software implementation) to theoretical approaches (modeling, CFD simulations etc.).
- Double-Diffusive Convection - I have made my Ph.D. work on double-diffusive convection available on this site using a dedicated set of webpages.
These pages contain scientific results on this multi-component, density-driven flow type, obtained with several different approaches like dynamical systems analysis (bifurcation and stability analysis) ...
and detailed direct numerical simulations ...
and these small-scale results end up in a single formula describing the large-scale effect of these flows ...
Moreover, the page contains a unique video showing flow development ...
and a practical guide for creating such a type of layered oceanic flow in a cup of coffee!