Yurij GELFGAT

Professor Yurij GELFGAT Head of Laboratory of Magnetohydrodynamic Technology Institute of Physics, University of Latvia Miera iela 32 Salaspils-1, LV 2169 Latvia Phone: +371 7945 855; mob. 9502314 Fax: +371 790 1214 E-mail: yglf@sal.lv; gelfgat@sal.lv

Born: November 30, 1936, Moscow, Russia

Interests:

Scientific activity is devoted to a complex of theoretical and experimental investigations dealing with physical and applied problems of magnetohydrodynamics (MHD), including:

• study of the influence of different types of electromagnetic fields on behaviour of mono- and multi-phase electrically conducting incompressible media;
• study of stationary and non-stationary hydrodynamic and heat/mass transfer processes in liquid metal media subject to the influence of electromagnetic forces;
• development of physical and technical basis of MHD means for controlling motion, heat and mass transfer phenomena in different modern technologies operating with liquid metal media;
• study and development of new original MHD technologies regarding problems of metallurgy, casting industry, electrical chemistry, etc.;
• development of a scientific base for MHD techniques for the processes of production of semiconductor single crystal and composite materials, modelling and implementation of elements of space technologies under the terrestrial conditions.

Languages: Russian, English, Latvian

Education::

• University of Latvia (Faculty of Mechanics), 1958
• Riga Technical University (Faculty of Mechanics), 1959
• Dr.phys. (Candidate of Science in former USSR, PhD in Western countries). Title of the Thesis: Study of Uniform and Non-Uniform Turbulent MHD Flows Confined by the Walls with Different Electric Conductivity and Roughness, Latvian Academy of Sciences, 1968
• Dr.habil.phys. (Doctor of Science in former USSR). The Title of the Thesis: MHD Means to Control Hydrodynamic Processes in Liquid Metal Media, Leningrad Polytechnic Institute, Russia, 1984
• Professor of Physics (mechanics of liquid and gas, magnetohydrodynamics), 1989

Experience:

• Engineer, State Electrotechnical Factory VEF, Riga, 1959 - 1963
• Head of Department of Mechanisation and Automatization, Research and Manufacturing Company "Kommutator", 1963 - 1964
• Researcher, Senior Researcher, Head of Laboratory and Professor, Institute of Physics,  1964 -

Honours and Awards:

• Honoured Inventor of the Latvian SSR, 1988
• The Latvian Academy of Sciences F.Canders Prize, 1991
• The Latvian Academy of Sciences Presidium First (1977, 1989, 1990) and Second (1973, 1981) Awards
• The  Latvian Academy of Sciences and Joint-stock Company R&D ALFA Prize in Physics and its applications for significant inventions and remarkable results in applied magnetohydrodynamics and material science, 2000
• State Emeritus Scientist, 2004

Professional Activities and Memberships:

• Vice-Chairman, Topical Committee on Electromagnetic Processing of Materials, Council of International Association "Hydromagnetic Phenomena and Applications" (HYDROMAG), 1995 -
• Co-chairman of the Scientific Council, Institute of Physics.
• Editorial Advisory Board and Expert for journal Magnetohydrodynamics
• Expert for journals  Mechanics of Fluid&Gas (Russian Acad. Sci.), Journal of Microgravity Science&Technology, Physics&Chemistry of Material Processing (Russia)
• Chairman, Co-chairman of sessions and a Member of Organising Committees of 12 International scientific Congresses and Conferences, Schools and Seminars
• Member, European Materials Research Society (EMRS)
• Member, Society of Latvian Scientists
• Member, Latvian Physical Society
• Member, Latvian National Committee for Mechanics

Recent/Representative Publications:

Author of 3 monographs, about 235 scientific works and more than 115 patents.

Monographs:

• Yu.M.Gelfgat, O.Lielausis , E.V.Shcherbinin.  Liquid Metal Subject to the Influence of Electromagnetic Forces. 1976, Riga: Zinatne Press, 248 pp. (in Russian)
• Buslovich S., Gelfgat Yu., Kotsinsh I. Automatization of Printed Circuits Soldering. 1976, Moscow: Nauka Press, 216 pp. (in Russian)
• Yu.Gelfgat ,  L.Gorbunov,  I.Vitkovsky.  MHD Throttling and Liquid Metal Flow Control. 1989, Riga: Zinatne Press, 312 pp. (in Russian)

Publications:

• Yu.Gelfgat, L.A.Gorbunov. MHD means for affecting hydrodynamics, heat and mass transfer in single crystal melt growth . In : Metallurgical Technologies, Energy Conversion, and Magnetohydrodynamic Flows (ed.by H.Branover and Y.Unger), Ser. "Progress in Astronautics and Aeronautics", 1992, vol.148, pp.138-157.
• Yu.Gelfgat. Kinetics of break-up of binary liquid metal system with a miscibility gap and its prevention by electromagnetic forces. In: "Immiscible Liquid Metals and Organics" (ed. By L.Ratke), Germany: Informationsgesellschaft, Verlag, 1992, pp.238-250
• Yu.Gelfgat, et al. CdTe crystal growth in the Soviet facility ZONA 4. - Microgravity Science and Technology, 1993, vol.6, Nr.2, pp.88-90
• Yu.Gelfgat. Application of MHD facilities to technology. In: Metallurgical Technologies, Energy Conversion and MHD Flows (ed.H.Branover, Y.Unger), Ser."Progress in Astronautics and Aeronautics" 1993, vol.148, pp.32-49
• Yu.Gelfgat. Electromagnetic field application in the processes of single crystal growth under microgravity. - Acta Astronautica, 1995, vol. 37, pp. 333 - 345.
• J.Priede., Yu.Gelfgat. Mathematical model of the mean electromagnetic forces induced by a rotating magnetic field in a liquid column of a finite length. - Magnetohydrodynamics, 1996, Nr.3, pp.241-251.
• I.Grants, J.Priede, Yu.Gelfgat. MHD flows in a cylindrical duct in rotating and steady magnetic fields. - Magnetohydrodynamics, 1996, Nr.3, pp.210-222.
• Yu.Gelfgat, M.Abricka, J.Krumin. Numerical simulation of MHD rotator action on hydrodynamics and heat transfer in single crystal growth. - J.Crystal Growth, 1997, vol.180, pp.388-400.
• I.Grants, Yu.Gelfgat. Taylor-Gorter instability of a liquid metal flow in a rotating magnetic field. - Magnetohydrodynamics, 1999, vol.35, Nr.2, pp.147-154.
• Y.Gelfgat, J.Krumins, M.Abricka. On melt stirring by a combined magnetic field as a means to intensify preparation of multi-component magnesium alloys. - In: Magnesium 2000 (eds. E.Aghion, D.Eliezer), Magnesium Research Institute (MRI) Ltd., 2000, pp.82-89
• Yu.Gelfgat, A.Bojarevich, G.Gerbeth, A.Cramer. Verfahren und Vorrichtung zur Metallfaserherstellung nach dem Schmelzextraktions-verfahren. Patent of Germany, No DE10000097.5, 2000
• Y.Gelfgat, J.Krumins, B.Q.Li. Effects of system parameters on MHD flows in rotating magnetic fields. - Journal of Crystal Growth, 2000, vol.210, pp.788-796.
• J.Krumins, Yu.Gelfgat, M.Abricka. On the relationship between the type of electromagnetic stirring and heat/mass transfer intensiy in liquid metal melts. - Proceedings of Intern. Scientific Colloquium "Modelling for Saving Resources", Riga, May 17-18, 2001, pp.29-34
• Yu.Gelfgat, J.Krumins, M.Abricka. Influence of alternating magnetic fields on the hydrodynamics and heat/mass transfer in the processes of bulk single crystal growth. – Proc. 4^th Intern. Conference on Single Crystal Growth and Heat Mass Transfer ICSC-2001, Obninsk, Russia, Sept.24-28, 2001, pp.68-79.
• Yu.Gelfgat, M.Abricka, J.Krumins. Influence of alternating magnetic fields on the hydrodynamics and heat/mass transfer in the processes of bulk single crystal growth. – Magnetohydrodynamics, 2001, vol.37, No 4, pp.400-416.
• M.Abricka, Yu.Gelfgat, J.Krumins. Influence of combined electromagnetic fields on the heat/mass transfer in the Bridgman process. – Energy Conservation and Management, 2002, No 43, pp.327-333.
• Yu.Gelfgat, J.Krumins, M.Abricka. On possible simultaneous heating and stirring of the melt in alternating electromagnetic fields different frequences. – Proc. 5^th Intern. PAMIR Conference on Fundamental and Applied MHD, Ramatuelle, France, 2002, vol.2, pp.II13-II18.
• Yu.Gelfgat, J.Krumins, M.Abricka. Investigation of different combinations of steady and alternating magnetic fields on control the hydrodynamics and heat/mass transfer in single crystal growth. – Abstracts of Workshop WG-2 “Use of Magnetic Fields in Crystal Growth”, EU COST action P6, Riga, Latvia, June 18, 2002.
• Yu.Gelfgat, J.Krumins, M.Abricka. On possible simultaneous heating and stirring of the melt at single crystal growth by one indicator of electromagnetic field. – Magnetohydrodynamics, 2003, vol.39, No 2, pp.201-210.
• Yu.Gelfgat, J.Krumins, M.Abricka. On a possibility to use travelling magnetic fields for concurrent hesting and stirring of the melt in crystal growth. – Proceedings of International Scientific Colloquium “Modelling for Electromagnetic Processing”, Hannover, March 24-26, 2003, pp.211-218.
• A.Gelfgat, Yu.Gelfgat. Experimental and numerical study of rotating magnetic field driven flow in cylindrical enclosures with different aspect ratios. – Magnetohydrodynamics, 2004, vol.40, No 2, pp.147-160.
• Yu.Gelfgat, J.Krumins, M.Abricka. On the calculation of the characteristics of motion and heat/mass transfer in combined electromagnetic fields. – Magnetohydrodynamics, 2005, vol.41, No 1, pp.19-38.
• Yu.Gelfgat, M.Skopis, J.Grabis. Electromagnetically driven vortex flow to introduce small solid particles into liquid metal. – Magnetohydrodynamics, 2005, vol.41, No 3, pp.249-254.

   

• Yu.Gelfgat, J.Priede, G.Gerbeth. Verfahren und Vorrichtung zur Herstellung von Einkristallen in Ampullen unter Magnetfeldein-fluss. Patent of Germany, No DE197040075, 1999.
• Yu.Gelfgat, A.Bojarevics, G.Gerbeth, A.Cramer. Verfahren und Vorrichtung zur Metallfaserherstellung nach dem Schmelzextraktions-verfahren. Patent of Germany DE 10000097.5, 2000.
• A.Cramer, G.Gerbeth, Yu.Gelfgat, A.Bojarevics. Die folgenden Amgaben sind den vom Anmelder eingereichten Ungerlagen entnommen. Patent of Germany DE 10000097 A1, 12.07.2001.
• V.W.Ammon, J.Virbulis, E.Tomzig, Yu.Gelfgat, L.Gorbunov. Verfahren und Vorrichtung zum Herstellen eines Einkristals aus Silicium. Patent of Germany DE 10102126 A1, 22.08.2002.

• Yu.M.Gelfgat (Head of Project). Investigation of the MHD Influence on Heat, Mass and Motion Transfer Phenomena in the Processes of Single and Polymaterial Growth from Electrically Conducting Melts. Latvian Council of Science (1991-1993).
• Yu.M.Gelfgat (Head of Project). Investigation of the Interaction of Hydrodynamic and Heat/mass Transfer Phenomena in Melts Crystallising in Electromagnetic Fields. Latvian Council of Science (1994-1996).
• Yu.M.Gelfgat (Head of Project). Investigation of Physical Characteristics of MHD Methods Applied in Crystallisation Processes. Latvian Council of Science (1997-2000).
• Yu.M.Gelfgat (Head of Project). Investigation of Physical Laws of MHD Methods Applied to Control  Crystallisation Processes. Latvian Council of Science (2001 - 2004).
• Yu.M.Gelfgat (Head of Project). Physical Regularities of MHD Methods for Excitation and Suppression of Stationary and Non-stationary Motions in Large Volumes of Electrically Conducting Liquids. Latvian Council of Science (2005 - ).
• Yu.M.Gelfgat (Head of the six Research Contracts). The Investigation of the Electromagnetic Fields Interaction with Molten Metals in Different Technological Devices. Research Centre Rossendorf (Dresden, Germany) 1992-1998
• Yu.M.Gelfgat (Head of the four Research Contracts). The Development and Investigation of MHD Technologies for Silicon Single Crystal Growth. Wacker Siltronic, Wacker -Chemitronic Corporation (Germany). 1995-1997
• Yu.M.Gelfgat (Head of the Research Contract). Study on the Stabilization of the Metallic Sheet Vibration by the Way of an Electromagnetic Procedure, IRSID Company, France, 1999.

Last update 22.11.2005