Electromagnetic Control of Electron Beam Evaporation: Numerical Simulation

  • U. Lüdtke
  • Ch. Karcher
Part of the Lecture Notes in Computational Science and Engineering book series (LNCSE, volume 21)


During electron beam evaporation of liquid metals, the strong energy input induces strong temperature gradients along the free surface and in the interior of the melt. Thus, the liquid metal is subject to both thermocapillary and natural convection. The vigorous convective motion within the melt leads to highly unwelcome heat losses through the walls of the crucible. The strong convective heat transfer limits the temperature rise in the hot spot and, therefore, the thermodynamic efficiency of the evaporation process. The present paper aims to demonstrate that melt-flow can be effectively controlled by using external magnetic fields in order to considerably reduce the convective heat losses. We employ numerical simulations based on the finite element method to study the effects of a rotating magnetic field on convective heat transfer in a liquid metal heated locally at its free surface


Free Surface Nusselt Number Liquid Metal Lorentz Force Electron Beam Evaporation 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2002

Authors and Affiliations

  • U. Lüdtke
    • 1
  • Ch. Karcher
    • 2
  1. 1.Department for ElectroheatIlmenau University of TechnologyIlmenauGermany
  2. 2.Department for Mechanical EngineeringIlmenau University of TechnologyIlmenauGermany

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