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problems:calving [Elmer/Ice Wiki]

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Calving

Elmer/Ice includes the ability to predict and simulate the evolution of a calving glacier in 2D and in 3D.

2D Calving

The 2D calving model operates on flowline domains, and consists of 2 main solvers: Calving2D which computes crevasse penetration and predicts calving events, and TwoMeshes which modifies the mesh geometry in response to calving.

A simple 2D calving test case can be found in elmerice/Tests/Calving2D.

3D Calving

Requirements: gmsh installation (compiled from source??)

The 3D calving model is significantly more complex than the 2D model, due to the comparative difficulty of identifying calving events in a 3D domain (Calving3D), as well as the requirement for complete remeshing following calving events (Remesh).

The repeated unsupervised remeshing in the 3D calving model occasionally produces low-quality or degenerate 3D elements, which cause problems for the flow solution. Various strategies have been employed in the Remesh solver to reduce the frequency of these problematic meshes. Additionally, the auxiliary solver CheckFlowConvergence can be used to check that the flow solution has converged, and take appropriate action if not.

Crevasse Depth Calving Criterion

Both the 2D and 3D calving models implement the 'Crevasse Depth Calving Criterion', which predicts calving events based on the penetration of surface and basal crevasses.

problems/calving.1491986574.txt.gz · Last modified: 2017/04/12 08:42 by jtodd
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