Liquid Metal Magnetohydrodynamics

ISBN-13: 9789401069397 / Angielski / Miękka / 2011 / 481 str.

J. J. Lielpeteris; R. J. Moreau

Opis

Liquid metal MHO is within the scope of two series of international conferences. One is the International Congress on "MHD Power Generation", held every four years, which includes technical and economical aspects as well as scientific questions. The other if the Beer-Sheva Seminar on "MHO Flows and Turbulence", held every three years in Israel. In addition to these well established meetings, an IUTAM Symposium was previously organized in Cambridge (UK) in 1982 on "Metallurgical Applications of MHD" by the late Arthur Shercliff. It was focussed on a very specific subject developing radiply from the middle of the 1970's. The magnetic field was generally AC, including frequencies high enough for the skin-depth to be much smaller than the typical length scale of the liquide pool. And the development of new technologies, or the improvement of existing ones, was the main justification of most of the researches presented and discussed. Only two participants from Eastern countries attended this Symposium. By the middle of the 1980's we felt that on this very same topic ideas had reached much more maturity than in 1982. We also realized that a line of research on MHD flows related to fusion reactors (tokamaks) was developing significantly, with particular emphasis on flows at large interaction parameter.

Spis treści

Session A : Large Interaction Parameter.- Liquid metal in a strong magnetic field (General Lecture).- Numerical solutions of three-dimensional MHD flows in strong non-uniform transverse magnetic fields.- MHD-flows at high Rm, N and Ha.- MHD pressure drop of liquid metal flow in circular and rectangular ducts under transverse magnetic field.- Linear approximation application limits in MHD-flow theory for strong magnetic fields. Experimental results.- Session B : Fusion Related Flows.- Application of the core flow approach to MHD fluid flow in geometric elements of a fusion reactor blanket.- Experimental and theoretical work on MHD at the kernforschungszentrum Karlsruhe. The MEKKA-program.- Liquid metal turbulent flow phenomena and their implications on fusion reactor blanket design.- Experimental investigation of 3-D MHD flows at high Hartmann number and interaction parameter.- Magnetohydrodynamics in nuclear energetics (General lecture).- Poster Session 1 : DC Fields.- Liquid metal flows with polydispersed solid and gaseous inclusions.- Dispersion of small particles in MHD flows.- Two-phase flows studies in mercury-air liquid metal MHD generators.- Liquid metal MHD generators in two-phase flow systems.- Modelling of magnetohydrodynamic two-phase flow in pipe.- Melt magnetohydrodynamics of single crystal growth.- The effect of electromagnetic field on semiconductor single crystal growth and characteristics.- Gas bubbles motion during vacuum treatment of liquid aluminium in MDV-type devices.- MHD turbulence decay behind spatial grids.- The effect of a uniform magnetic field on stability, transition and turbulence as a control means for liquid metal flow mixing.- Session C : Current Carrying Melts.- Electrically induced vortical flows (General lecture).- Liquid metal flow near magnetic neutral points.- Modelling of electrically induced flows for studying current carrying melts of electrometallurgical devices.- Session D : Aluminium Reduction Cells.- Amplitude evolution of interfacial waves in aluminium reduction cells.- Physical and mathematical modeling of MHD-processes in aluminium reduction cells.- On the analysis by perturbation methods of the anodic current fluctuations in an electrolytic cell for aluminium production.- Session E : AC Stirring.- Fluid flows induced by alternating magnetic (General lecture).- Fluid metal flow study in an induction furnace based on numerical simulation.- A high frequency induction furnace for oxide melting.- Directional melt-flow in channel induction furnaces.- Characteristic properties of MHD flow in magnetodynamic pumps.- Session F : Electromagnetic Shaping.- Deflection of a stream of liquid metal by means of an alternating magnetic field.- The shape of liquid metal jets under a uniform transverse magnetic field.- Electromagnetic control of liquid metal free surfaces.- Deformation of an electrically conducting drop in a magnetic field.- Controlled decomposition of liquid metal jets and films in technological and power devices.- Poster Session 2 : AC Fields.- More accurate skin-depth approximation.- Overall and local thickness measurement of layers with differing electrical properties.- Determination of MHD machine parameters using the 1D model of a non-uniform flow.- Experimental and theoretical studies on the stability of induction pumps at large Rm numbers.- 3500 m3/h MHD pump for fast breeder reactor.- Self-excitation of liquid metal MHD generators.- Comprehensive study on the MHD phenomena in the metal pool with the single-phase induction coil.- Grain refinement in continously cast ingots of light metals by electromagnetic casting.- Liquid metal flow control using AC fields.- Session G : Measurements.- Diagnostics of liquid metal flows using fibre-optic velocity sensor.- On local measurements of the up and downstream magnetic wake of a cylinder at low magnetic Reynolds number.- Metallurgical aspects of electromagnetic processing of materials (General lecture).- Session H : Dynamo Theory.- Liquid metal MHD and the geodynamo (General lecture).- The helical MHD dynamo.- The Ponomarenko dynamo.- MHD phenomena in fast neutron reactors with a liquid metal heat carrier.- Session I : Turbulence.- The effect of initial and boundary conditions upon the formation and development of MHD turbulence structure.- Two-dimensional MHD turbulence.- MHD instabilities and turbulence in liquid metal shear flows.- Session J : Stability with Uniform Field.- Dispersion and chaos in linear arrays of vortices.- Stability of magnetohydrodynamic flow over a stretching sheet.- Stability of closed azimuthal jet of liquid metal.