Discussion of Different Model Approaches for the Flow Behavior of Ice |
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| Authors: | Julia Christmann Martin Rückamp Ralf Müller Angelika Humbert |
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| Institution: | 1. Institute of Applied Mechanics, University of Kaiserslautern;2. Section of Glaciology, Alfred-Wegener-Institut Helmholtz Zentrum für Polar- und Meeresforschung, Bremerhaven;3. Section of Glaciology, Alfred-Wegener-Institut Helmholtz Zentrum für Polar- und Meeresforschung, Bremerhaven
Department of Geosciences, University of Bremen |
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| Abstract: | Ice of Antarctic ice shelves is assumed to behave on long-term as an incompressible viscous fluid, which is dominated on short time scales by the elastic response. Hence, a viscoelastic material model is required. The thermodynamic pressure is treated differently in elastic and viscous models. For small deformations, the elastic isometric stress for ν → 0.5 gives similar results to those solving for pressure in an incompressible laminar flow model. A viscous model, in which the thermodynamic pressure is approximated by an elastic isometric stress, can be easily extended to viscoelasticity. (© 2016 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim) |
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