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Interface instability of an inelastic normal collision

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Abstract

The interface of two normal colliding media is always unstable. This is true even for both media showing the same density. The common precondition for a Rayleigh–Taylor instability “the lighter medium pushes the heavier” is generalised for the case that two media experience different accelerations in a short period after colliding. The arithmetic average of the accelerations determines the evolution of the wavy interface shape. The theory is applicable for various technologies of impact welding, such as explosion and magnetic pulse welding.

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  1. Chair of Fluid Systems, Technische Universität Darmstadt, Otto-Berndt-Straße 2, 64287, Darmstadt, Germany

    P. F. Pelz & M. M. G. Kuhr

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  1. P. F. Pelz
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  2. M. M. G. Kuhr
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Correspondence to P. F. Pelz.

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Pelz, P.F., Kuhr, M.M.G. Interface instability of an inelastic normal collision. Arch Appl Mech 88, 1945–1951 (2018). https://doi.org/10.1007/s00419-018-1420-8

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  • DOI: https://doi.org/10.1007/s00419-018-1420-8

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