MoT-Voellmy v. 2025-05-20

[DieterIssler]

This new version fixes one important bug in the code (see closed Issue #1), provides an executable also for Apple Macintosh computers, updates the documentation, and provides several new examples. Users are urged to switch to the new version and discard the old one.

The bug fix concerns the term quantifying extra friction due to the centrifugal force. If curvature effects are turned on in the simulation configuration file, the run-out distance in the old version was almost identical to that without this term. In the new version, it will be shorter than without curvature effects. In typical avalanches, the differences will be a few tens of meters, but it can amount to several hundred meters if the avalanche attains very high speed. This can be seen very clearly in one of the example cases—drawn from the ISeeSnow model intercomparison initiative of the AvaFrame development team at BFW Innsbruck: Run the simulations 1HS_03_null75s_MoT-Voellmy.rcf and 1HS_03_curv75s_MoT-Voellmy.rcf (in the directory ./Examples/2023_ISeeSnow/data/CoulombOnly/Inputs/ and compare the results (for QGIS users, the QGIS project file ./IdealizedTopo.qgz may come in handy).

Full Changelog: v2025-02-10...v2025-05-20

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This discussion was created from the release MoT-Voellmy v. 2025-05-20.