On Modelling of Surface Deformations during Plasma Disruptions
Plasma facing components in tokamak type fusion reactors are subjected to intense heat loads during plasma disruptions, causing melting and evaporation of the metallic surface layer. Simultaneously, large eddy currents are induced in the plasma facing components which interact with the large background magnetic field, hence producing substantial forces which have strong influence on component integrity and life time, and may cause surface deformations of the melt layer. The shapes of the free surface of the molten layers of pure tungsten metal that are produced under the influence of external body forces arising from electromagnetic fields, were studied by using a two-dimensional transient computer program which solves the equations of motion in two-phase system, with monotonically varying external body forces both in space and time. It is demonstrated that external body forces, having an outward direction from the plane of the test piece, influence the free surface significantly. Results are presented for different disruption times and for a range of external body forces varying linearly in space and in time.
Bibliographic Reference: Article: Fusion Technology (1999)
Record Number: 199911411 / Last updated on: 1999-10-01
Original language: en
Available languages: en