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Gunter Gerbeth on Muck Rack

Gunter Gerbeth

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Articles

Numerical and experimental investigation of electromagnetic separation control using different wave forms

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By Thomas Albrecht, Helmholtz-Zentrum Dresden-Rossendorf, Gunter Gerbeth, Tom Weier
| tu-dresden.de
We investigate the separated flow around an inclined flat plate at a Reynolds number of 104 by Direct Numerical Simulation (DNS) and time-resolved Particle Image Velocity (PIV). Flow separation is suppressed using sinusoidally and rectangularly oscillating Lorentz forces in streamwise direction. An rms momentum coefficient of 2.25% increases the time-averaged lift, deduced from PIV by a global momentum approach, by 20-45%.
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Model Experiments for Flow Phenomena in Crystal Growth

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By Olf Pätzold, Kaspars Dadzis, Gunter Gerbeth
| Color Research & Application Verified
Original Paper Kaspars Dadzis PDF PDF Share Abstract The concept of a physical model experiment is introduced and discussed in the context of melt and gas flows in bulk crystal growth processes. Such experiments allow one to "extract" selected physical phenomena from the full complexity of a real crystal growth process and “transfer” them to material systems with an easier access for experimental measurements.
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