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UID:DSC-13775
DTSTART;TZID=Europe/Berlin:20171123T130000
SEQUENCE:1511423349
TRANSP:OPAQUE
DTEND;TZID=Europe/Berlin:20171123T140000
URL:https://dresden-science-calendar.de/calendar/de/detail/13775
LOCATION:TUD Materials Science - HAL\, Hallwachsstraße 301069 Dresden
SUMMARY:Eckert: Solidification of metal alloys: electromagnetic flow contro
 l\, in-situ visualization\, phase-field simulations of dendritic morpholog
 ies
CLASS:PUBLIC
DESCRIPTION:Speaker: Prof. Kerstin Eckert\nInstitute of Speaker: Helmholtz-
 Zentrum Dresden-Rossendorf\, Institute for Fluid Dynamics\; TU Dresden\, I
 nstitute of Process Engineering and Environmental Engineering\nTopics:\nMa
 terialien\n Location:\n  Name: TUD Materials Science - HAL (24a)\n  Street
 : Hallwachsstraße 3\n  City: 01069 Dresden\n  Phone: \n  Fax: \nDescripti
 on: Solidification processes extend over a length scale range of about 9 d
 ecades\, starting from the scale of the casting mold\, over the formation 
 of the dendritic microstructure towards the attachment kinetics at the nan
 o-scale. In the talk\, processes on three different length scales are cons
 idered. In the first part\, an overview is given on the works at HZDR cond
 ucted on electromagnetic flow control at the macroscale O(1e-1 m). In part
 icular it is demonstrated how a forced convection\, generated by Lorentz f
 orces in modulated magnetic fields\, can be used for a reduction of undesi
 red macrosegregation. The second part covers in-situ X-ray visualization e
 xperiments of solidification. Using microfocus tubes\, both the interplay 
 between forced and natural convection and the formation of freckles is sho
 wn. Furthermore\, pinch-off of secondary sidearms of dendrites is revealed
  in recent synchrotron experiments. The simulation of pinch-off events by 
 means of phase-field simulations is discussed in the third part. Based on 
 recent simulations\, a general equation is developed for the specific inte
 rfacial area evolution that maps most of the previously performed synchrot
 ron X-ray tomography and isothermal coarsening experiments.
DTSTAMP:20260816T111030Z
CREATED:20171116T075613Z
LAST-MODIFIED:20171123T074909Z
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