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Investigation of Lorentz Force Velocimetry Using Electromagnets

Journal of Iron and Steel Research International 2012年第S1期19卷 106-109页

作者： SANTARA Fatoumata Bintou KARCHER Christian thess andre Institute of Thermodynamics and Fluid Mechanics Ilmenau University of TechnologyIlmenau 100565 98684Germany

The present work is an analysis on the ElectroMagnetic Lorentz Force Velocimetry(EM-LFV).This noncontact flow measurement technique is based on evaluating the Lorentz force generated by the interactions of an electrically conducting fluid with a localized magnetic field that is produced by *** and numerical calculations were carried out as a continuation of a previous work published by thess et *** objective is to establish the behavior of the Lorentz force as a function of the main geometric parameters considered in the studied geometry. Thus we present here the evolution of the Lorentz force induced in a translating cylindrical solid body and the coefficient of sensitivity of the flowmeter thanks to numerical simulations in respect with the main geometrical parameters of the problem.

关键词： computational magneto-hydrodynamics Lorentz force velocimetry electromagnet

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Lorentz Force Velocimetry for Poorly Conducting Fluids-Development and Validation of a Novel Flow Rate Measurement Device

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Journal of Iron and Steel Research International 2012年第S2期19卷 613-616页

作者： WEGFRASS andre RESAGK Christian DIETHOLD Christian FRHLICH Thomas WERNER Michael HALBEDEL Bernd thess andre Institute of Thermodynamics and Fluid Mechanics Department of Mechanical EngineeringIlmenau University of Technology Institute of Process Measurement and Sensor Technology Department of Mechanical EngineeringIlmenau University of Technology Institute of Inorganic-nonmetallic Materials Department of Mechanical EngineeringIlmenau University of Technology

The paper demonstrated the feasibility of Lorentz Force Velocimetry for flow rate measurements of weakly conducting electrolytes using experimental results on salt water flow exposed to a permanent magnet *** innovative flow measurement technique allows the non-contact determination of flow rates and relies on the interaction between a magnetic field and a moving conducting *** an electrically conducting fluid moves through the magnetic field a Lorentz force is generated and acts on the measurement *** present report provides an overview about the experimental setups and the first measurement results.

关键词： Lorentz force velocimetry flow measurement electrolytes non-contact measurement

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Lorentz Force Sigmometry

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Journal of Iron and Steel Research International 2012年第S1期19卷 123-126页

作者： Mladen Zec Robert P.Uhlig Marek Ziolkowski Hartmut Brauer andre thess Department of Advanced Electromagnetics Ilmenau University of TechnologyIlmenau 100565 98684 Germany Institute of Thermodynamics and Fluid Mechanics llmenau University of TechnologyIlmenau 100565 98684Germany

The present communication reports a new technique for the contactless measurement of the specific electrical conductivity of a solid conductor or an electrically conducting *** term the technique 'Lorentz Force Sigmometry' where the neologism 'Sigmometry' is derived fiom the Greek letter sigma,often used to denote the electrical *** force sigmometry(abbreviated LoFoS)is based on similar principles as the traditional eddy current testing but allows a larger penetration depth and is less sensitive to variations in the distance between the sensor and the *** we formulate the theory of LoFoS and numerically compute the calibration function which is necessary for determining the unknown electrical conductivity from the measurement of a Lorentz force.

关键词： electrical conductivity Lorentz force finite element method

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