Pure Tungsten Metal
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Plasma facing components in tokamak type fusion reactors are subjected to intense heat loads during plasma disruptions. The influence of high heat fluxes on the depth of heat affected zones on pure tungsten metal, had been studied by using a two-dimensional transient computer model which solves the equations of motion and energy. Results are presented for a range of energy densities and disruption times. It is demonstrated, that the presence of surface tension creates convective flows, hence exercising an influence on the flow intensities and resulting depths of tungsten molten layers during plasma disruptions. The calculated depths of molten layers are also compared with other mathematical models that have been based on the assumption that heat is transported through the material by conduction only.
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