Dr. Yasser Safa

Persönliches Profil

Tätigkeit an der ZHAW

Senior Research, Project Leader
Institute for Computational Physics


home.zhaw.ch/~safa

Arbeits- und Forschungsschwerpunkte, Spezialkenntnisse

Airborne Wind Energy Research, Structural Mechanics Analysis and Design, Multi-Physics Modelling, Thermodynamic of Phase Changes, Fuel Cell Technology.

Aus- und Fortbildung

⌘ 2005 PhD ès. Sciences Techniques
The Section of Mathematics at EPFL, The Swiss Federal Institute of Technology, Lausanne,

Thesis: Numerical Simulation of Thermal and Magnetohydrodynamic Phenomena in Hall-Héroult Cells
A joint development project with Rrio Tinto Alcan,


⌘ 2000 DEA (Master of Advanced Study in Modelling and Intensive Computing)
Partnership: INRIA Rennes France, Univeristy of Reims France, Lebanese University and EPFL Lausanne

Thesis: Optimization of Electrical Current Lines in The Cathode Collector Bar of Aluminum Electrolysis Cell
In collaboration between EPFL and Rrio Tinto Alcan,


⌘ 1998 Civil Engineer Degree
Lebanese University

Thesis: Computational Study on the Underground Nuclear Wast Storage.
A research project in collaboration with Ecole de Mines of Nancy, Polytechnic Institute of Lorraine, France,

Beruflicher Werdegang

⌘ Since 07/2009 Senior Scientist
ZHAW, Zurich University of Applied Sciences, Winterthur, Switzerland.

Topics: Two-Phase Flow, Wind Energy, Transport Phenomena, Thermal Stress Analysis, Fuel Cell Technology


⌘ 2008 Research Associate

ZHAW, ICP

Tasks: Numerical code developer

⌘ 2006 - 07/2008 Postdoctoral Researcher
Geneva University.

Topics: Thermodynamics of Phase Equilibrium at Cryogenic Temperature, Helium and Hydrogen Applications


⌘ (06 - 09)/2006 Academic Guest
Institute of Computational Science (IcoS), ETHZ, Swiss Federal Institute of Technology, Zürich.

Topics: Reaction-diffusion Problem With Concentration Driven Deformation, Simulation Methods Using Particles, Parallel Computing


⌘ 2001 – 2006 Research Assistant
EPFL, Swiss Federal Institute of Technology, Lausanne

Topics: Development of Alumnium Reduction Cells Technology: Structural Mechanics, Thermal, Hydrodynamics and Electromagnetics, Numerical Code Implementation, Teaching of Numerical Analysis

Mitglied in Netzwerken

• The Swiss Federal Institute of Technology Lausanne, EPFL
• 2006-2008, Geneva University
• The Swiss Federal Institute of Technology, Zürich ETHZ
• Until 2006, Collaboration with Rrio Tinto Alcan
• Since 2008 Collaboration with Hexis
• 2008-2010 Collaboration with The Paul Scherrer Institute, PSI Electrochemistry Laboratory

Projekte

• Novel approaches for investigating local corrosion and mechanical degradation of multiphasic alloys / Stellv. ProjektleiterIn / Projekt laufend
• Designing smart wave guides and phononic cloaks using metamaterials / ProjektleiterIn / Projekt abgeschlossen
• Innovative rotor design of a new airborne wind power system / ProjektleiterIn / Projekt abgeschlossen
• Nonlinear Thermo-Mechanics of Surface Growth for Additive Manufacturing Applications / ProjektleiterIn / Projekt abgeschlossen
• A computational framework for simulation of dynamic delamination in composite blades and wings / ProjektleiterIn / Projekt abgeschlossen
• Design-Spaces zur Entwicklung von Sensor- und Aktorsystemen sowie Komponenten mit erhöhter Robustheit bezüglich Herstellung und Lebensdauer / ProjektleiterIn / Projekt abgeschlossen
• Developing a Rotor Model of a Novel Lighter-Than-Air System of a Wind Power Turbine / ProjektleiterIn / Projekt abgeschlossen
• Testing a new method for characterization and optimization of the adhesion strength of ceramic and metallic coatings / ProjektleiterIn / Projekt abgeschlossen

Publikationen

• Soleiman Fallah, Arash; Giannakeas, Ilias N.; Mella, Rizgar; Wenman, Mark R.; Safa, Yasser; Bahai, Hamid,

  2020.

  On the computational derivation of bond-based peridynamic stress tensor.

  Journal of Peridynamics and Nonlocal Modeling.

  Verfügbar unter: https://doi.org/10.1007/s42102-020-00036-9

• Fallah, Arash; Ghajari, Mazdak; Safa, Yasser,

  2019.

  Computational modelling of dynamic delamination in morphing composite blades and wings.

  The International Journal of Multiphysics.

  13(4), S. 393-430.

  Verfügbar unter: https://doi.org/10.21152/1750-9548.13.4.393

• Safa, Yasser; Hocker, Thomas,

  2015.

  A validated energy approach for the post-buckling design of micro-fabricated thin film devices.

  Applied Mathematical Modelling.

  39(2), S. 483-499.

  Verfügbar unter: https://doi.org/10.1016/j.apm.2014.05.038

• Safa, Yasser; Hocker, Thomas; Prestat, Michel; Evans, Anna,

  2014.

  Post-buckling design of thin-film electrolytes in micro-solid oxide fuel cells.

  Journal of Power Sources.

  250, S. 332-342.

  Verfügbar unter: https://doi.org/10.1016/j.jpowsour.2013.10.125

• Evans, Anna; Prestat, Michel; Tölke, R.; Schlupp, M. V. F.; Gauckler, L. J.; Safa, Yasser; Hocker, Thomas; Courbat, J.; Briand, D.; de Rooij, N. F.; Courty, D.,

  2012.

  Residual stress and buckling patterns of free-standing yttria-stabilized-zirconia membranes fabricated by pulsed laser deposition.

  Fuel Cells.

  12(4), S. 614-623.

  Verfügbar unter: https://doi.org/10.1002/fuce.201200028

• Safa, Yasser; Flueck, M.; Rappaz, J.,

  2009.

  Numerical simulation of thermal problems coupled with magnetohydrodynamic effects in aluminium cell.

  Applied Mathematical Modelling.

  33(3), S. 1479-1492.

  Verfügbar unter: https://doi.org/10.1016/j.apm.2008.02.011

• Safa, Yasser; Pfenniger, Daniel,

  2008.

  Equation of state and stability of the helium-hydrogen mixture at cryogenic temperature.

  The European Physical Journal B.

  66(3), S. 337-352.

  Verfügbar unter: https://doi.org/10.1140/epjb/e2008-00438-8

• Safa, Yasser,

  2005.

  Simulation numérique des phénomènes thermiques et magnétohydrodynamiques dans une cellule de hall-héroult.

  Lausanne:

  École polytechnique fédérale de Lausanne.

  Verfügbar unter: https://doi.org/10.5075/epfl-thesis-3185

• Safa, Yasser,

  2011.

  Helium thermodynamics, analytical model

  .

  In:

  Helium : characteristics, compounds, and applications.

  New York:

  Nova Science Publishers.

  S. 191-208.

• Rappaz, J.; Flueck, M.; Safa, Yasser,

  2006.

  Influence of thermo-hydraulic fields on structural mechanics of aluminum reduction cells [Paper].

  In:

  Light Metals 2006 : proceedings of the technical sessions presented by the TMS Aluminum Committee at the 135th TMS Annual Meeting, San Antonio, Texas, USA, March 12-16, 2006.

  135th TMS Annual Meeting and Exhibition, San Antonio, USA, 12-16 March 2006.

  TMS - The Minerals, Metals & Materials Society.

  S. 433-438.

• Safa, Yasser,

  2005.

  Determination and influence of the ledge shape on electrical potential and fluid motion in a smelter [Paper].

  In:

  Light metals 2005 : proceedings of the technical sessions presend by the TMS Aluminum Committee at the 134th TMS Annual Meeting, San Francisco, California, February 13-17, 2005.

  134th Annual Meeting & Exhibition (TMS 2005), San Francisco, USA, 13-17 February 2005.

  TMS - The Minerals, Metals & Materials Society.

  S. 461-468.

• Evans, Anna; Prestat, Michel; Tölke, René; Gauckler, Ludwig J.; Hocker, Thomas; Safa, Yasser; Briand, Danick; Courbat, Jérôme; De Rooij, Nico,

  2012.

  Residual stress and buckling patterns of yttria-stabilised-zirconia thin films for micro-solid oxide fuel cell membranes [Paper].

  In:

  Mogensen, M. B.; Armstrong, T.; Gür, T. M.; Yokokawa, H.; Zhou, X.-D., Hrsg.,

  Ionic and mixed conducting ceramics.

  221st ECS Meeting, Seattle, Washington, 6-10 May 2012.

  Pennington:

  The Electrochemical Society.

  S. 475-479.

  ECS Transactions ; 45, 1.

  Verfügbar unter: https://doi.org/10.1149/1.3701338

• Safa, Yasser; Hocker, Thomas,

  2009.

  Numerical simulation of reactive transport phenomena in the hexis SOFC-system [Paper].

  In:

  Singhal, S. C.; Yokokawa, H., Hrsg.,

  Solid Oxide Fuel Cells 11 (SOFC-XI).

  11th International Symposium on Solid Oxide Fuel Cells (SOFC-XI), Vienna, Austria, 4-9 October 2009.

  Pennington:

  S. 1221-1230.

  ECS Transactions ; 25, 2.

  Verfügbar unter: https://doi.org/10.1149/1.3205651

• Safa, Yasser,

  2005.

  Numerical simulations of thermo-magneto-hydrodynamic phenomena [Paper].

  In:

  Numerical Swiss Colloquium, Zürich, 24 March 2005.

• Safa, Yasser; Hocker, Thomas,

  2016.

  Developed numerical approach of the melt-crystals phase-changing kinetics in solidification process.

  In:

  11th International Conference of Multiphysics, Winterthur, 8-9 December 2016.

• Hocker, Thomas; Safa, Yasser; Meier, Daniel Christoph,

  2016.

  Kontrolliertes Kühlen von Kakaobutter und Modellierung der Kristallisation von Kakaobutter.

  In:

  Choco Tec 2016 - der Schokoladenkongress des Jahres, Köln, Deutschland, 6-8 December 2016.

• Safa, Yasser,

  2015.

  Developed model of the phase change kinetics in cocoa butter, simulation of cooling and solidification processe.

  In:

  Meeting Day of Swiss Chocolate Industry "AK-Schoko Treffen", Zurich, 2015.

• Safa, Yasser,

  2014.

  A new phase mixture approach for the gas-liquid flow in shale reservoir.

  In:

  2nd International Symposium on Energy Challenges and Mechanics (ECM2) Aberdeen, UK, 19-21 August 2014.

• Safa, Yasser; Hocker, Thomas,

  2012.

  A validated model of membrane mechanics for micro SOFC.

  In:

  9th Symposium on Fuel Cell and Battery Modeling and Experimental Validation (ModVal 9), Sursee, 2.-4. April 2012.

• Prestat, Michel René; Evans, A.; Tölke, R.; Schlupp, M. V. F.; Scherrer, B.; Yáng, Z.; Martynczuk, J.; Pecho, Omar; Ma, H.; Laffranchini, S.; Bieberle-Hütter, A.; Gauckler, L. J.; Safa, Yasser; Hocker, Thomas; Muralt, P.; Yan, Y.; Courbat, J.; Briand, D.; de Rooij, N. F.,

  2012.

  Miniaturized free-standing SOFC membranes on silicon chips (A0704).

  In:

  10th European SOFC Forum 2012, Lucerne, Switzerland, 26–29 June 2012.

• Safa, Yasser; Hocker, Thomas,

  2011.

  A new model for detailed simulation of multiple transport and conversion processes in SOFC stack repeat units.

  In:

  8th Symposium on Fuel Cell Modeling and Experimental Validation (ModVal8), Bonn, Germany, 8-9 March 2011.

• Hocker, Thomas; Niffenegger, M.; Safa, Yasser; Chahine, E.,

  2011.

  Buckling-driven crack growth in elastic plate devices.

  In:

  21. Symposium Simulationstechnik (ASIM 2011), Winterthur, Schweiz, 7.–9. September 2011.

• Safa, Yasser,

  2011.

  Mathematica implementation of new simulation codes for challenging industrial applications.

  In:

  XIII. Berliner Mathematica-Tag, Berlin, Deutschland, 2. Dezember 2011.

• Schumacher, Jürgen; Safa, Yasser,

  2010.

  Modeling two-phase flow in the gas diffusion layer of a proton exchange membrane fuel cell.

  In:

  7th Symposium on Fuel Cell Modeling and Experimental Validation, Morges, 23-24 March 2010.

• Safa, Yasser; Schumacher, Jürgen O.,

  2009.

  Numerical modeling of the two-phase transport in a PEM fuel cell.

  In:

  Proceedings of the Third European Fuel Cell Technology & Applications Conference : presented at 3rd European Fuel Cell Technology and Applications Conference, December 15 - 18, 2009, Rome, Italy.

  European Fuel Cell Technology & Applications Piero Lunghi Conference (EFC2009), Rome, Italy, 15-18 December 2009.

• Schumacher, Jürgen; Safa, Yasser,

  2009.

  Numerical simulation of transport phenomena in PEM fuel cells.

  In:

  Algoritmy 2009 - Conference on Scientific Computing, Podbanske, Slovakia, 15-20 March 2009.

  Slovak University of Technology, Bratislava.

• Safa, Yasser,

  2005.

  Cuve de hall-héroult en thermomagnétohydrodynamique.

  In:

  Le 2ème Congrès National de Mathématiques Appliquées et Industrielles, Evian, France, 23-27 May 2005.

• Safa, Yasser,

  2004.

  Thermal calculations of reduction cells coupled with magnetohydrodynamic effect.

  In:

  Workshop in Numerical Simulations for Aluminum Industry, Lausanne, 2004.

Patente und Patentanmeldungen

• Safa, Yasser,

  2019.

  Appareil aéroporté pour la production d'énergie éolienne.

  Patentnummer CH715129 A2

  (2019-12-30)

  .

  Verfügbar unter: https://worldwide.espacenet.com/patent/search?q=pn%3DCH715129A2

• Safa, Yasser,

  2018.

  Appareil aéroporté pour la production d’énergie éolienne à haute altitude.

  Patentnummer CH713455 A2

  (2018-08-15)

  .

  Verfügbar unter: https://worldwide.espacenet.com/patent/search?q=pn%3DCH713455A2

• Safa, Yasser,

  2017.

  Appareil pour la production d’énergie éolienne grâce aux courants d’air en haute altitude.

  Patentnummer CH712386 A1

  (2017-10-31)

  .

  Verfügbar unter: https://worldwide.espacenet.com/patent/search?q=pn%3DCH712386A1

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