Discussion of Different Model Approaches for the Flow Behavior of Ice

• Published in: PAMM
• Main Authors: Christmann, Julia, Rückamp, Martin, Müller, Ralf, Humbert, Angelika
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Wiley 2016
• Subjects: Antarc*; Antarctic; Ice Shelves
• Online Access: https://epic.awi.de/id/eprint/45857/; https://epic.awi.de/id/eprint/45857/1/Christmann_et_al-2016-PAMM.pdf; https://hdl.handle.net/10013/epic.51950; https://hdl.handle.net/10013/epic.51950.d001

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.