Results 111 to 120 of about 725 (153)

Fast Reconstruction Algorithm for Contactless Inductive Flow Tomography

2020 10th International Conference on Advanced Computer Information Technologies (ACIT), 2020
The contactless inductive flow tomography is a measurement technique for the determination of the flow structure of an electrically conducting liquid. The procedure is based on the measurement of the magnetic field and can potentially be applied for visualisation and online-monitoring of industrial processes as, for example, continuous steel casting or
Wondrak, T., Jacobs, R. T., Faber, P.
openaire   +3 more sources

Recent progress on contactless inductive flow tomography

PAMM, 2009
AbstractThe contactless inductive flow tomography (CIFT) is a technique to reconstruct the velocity in electrically conducting melts using magnetic fields. One of its application could be the velocity reconstruction in the mould of the continuous casting process.
Wondrak, T., Stefani, F., Gundrum, T., Gerbeth, G.   +3 more
openaire   +4 more sources

Recent developments in the application of contactless inductive flow tomography

2018 International Applied Computational Electromagnetics Society Symposium (ACES), 2018
In many industrial processes dealing with liquid metals or semiconductors, the quality of the resulting product is directly affected by the flow of the melt. These melts are often too hot or too aggressive for direct flow measurement with conventional techniques.
Matthias Ratajczak, Thomas Wondrak, Frank Stefani   +2 more
openaire   +3 more sources

Singularity consideration in the integral equations for contactless inductive flow tomography

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, 2018
Purpose The contactless inductive flow tomography is a procedure that enables the reconstruction of the global three-dimensional flow structure of an electrically conducting fluid by measuring the flow-induced magnetic flux density outside the melt and by subsequently solving the associated linear inverse problem.
Jacobs, R. T., Wondrak, T., Stefani, F.
openaire   +4 more sources

Flow Visualization by Means of Contactless Inductive Flow Tomography in the Presence of a Magnetic Brake

Journal for Manufacturing Science and Production, 2015
AbstractIn continuous casting DC magnetic fields perpendicular to the wide faces of the mold are used to control the flow in the mold. Especially in this case, even a rough knowledge of the flow structure in the mold would be highly desirable. The contactless inductive flow tomography (CIFT) allows to reconstruct the dominating two-dimensional flow ...
Ratajczak, M., Wondrak, T., Timmel, K., Stefani, F., Eckert, S.   +4 more
openaire   +4 more sources

Flow Control in the Model of a Continuous Caster by Using Contactless Inductive Flow Tomography

Minerals, Metals and Materials Series, 2019
The global flow pattern of liquid metal in the slab mold of a continuous caster is difficult to control, as it cannot be measured in real-time by conventional methods. Contactless inductive flow tomography (CIFT) can easily provide real-time information about the flow structure (double or single roll) and the angle of the jet coming out of the ...
Glavinić, I., Abouelazayem, S., Ratajczak, M., Schurmann, D., Eckert, S., Stefani, F., Hlava, J., Wondrak, T.   +7 more
openaire   +4 more sources

Challenges in contactless inductive flow tomography for Rayleigh--Bénard convection cells

Magnetohydrodynamics, 2022
Contactless inductive flow tomography (CIFT) can reconstruct the complex 3-dimensional flow structure of the large-scale circulation in liquid metal filled Rayleigh-Bénard (RB) convection cells. The method relies on the precise measurement of weak magnetic fields induced by currents in the conducting liquid arising from the fluid motion in combination ...
Sieger, M., Mitra, R., Schindler, F., Vogt, T., Stefani, F., Eckert, S., Wondrak, T.   +6 more
openaire   +3 more sources

Increasing electromagnetic compatibility of Contactless Inductive Flow Tomography

2015 IEEE International Symposium on Electromagnetic Compatibility (EMC), 2015
In many metallurgical and silicon crystal growth applications the knowledge about the flow field of the respective liquid metals is vital for proper process management. The high temperatures and the opaqueness of those melts set severe restrictions on the applicable flow measurement methods.
Wondrak, T., Ratajczak, M., Gundrum, T., Stefani, F., Krauthäuser, H. G., Jacobs, R. T.   +5 more
openaire   +2 more sources

Enhancing robustness and applicability of contactless inductive flow tomography

2015 IEEE SENSORS, 2015
Measuring the flow velocity in hot, chemically aggressive and opaque melts is a challenging task even for today's measurement techniques. The contactless inductive flow tomography (CIFT) could provide a solution by applying magnetic fields to an electrically conducting melt and measuring the small flow-induced magnetic perturbances outside of the ...
Ratajczak, M., Wondrak, T., Zürner, T., Stefani, F.   +3 more
openaire   +2 more sources

Some methodological improvements of the contactless inductive flow tomography

International Journal of Applied Electromagnetics and Mechanics, 2009
The goal of contactless inductive flow tomography (CIFT) is the velocity reconstruction in electrically conducting melts which are used in many metallurgical and crystal growth applications. In this paper, we discuss some recent methodological improvements of this method, in particular the automatic search for an optimum regularisation parameter and ...
Wondrak, T., Stefani, F., Gundrum, T., Gerbeth, G.   +3 more
openaire   +2 more sources