StagYYFreeSurface (StagYYFS): A testbed for free-surface methods in geodynamical simulations using the finite volume (staggered-grid finite difference) discretization.

Software for computation of test cases documented in three manuscripts submitted to Geoscientific Model Development by Timothy Gray, Paul J. Tackley and Taras V. Gerya Variational Stokes method applied to free surface boundaries in numerical geodynamic models. https://doi.org/10.5194/egusphere-2025-6354 Lagrangian tracking methods applied to free surface boundaries in numerical geodynamic models. egusphere-2025-6546. https://doi.org/10.5194/egusphere-2025-6546 Volume of Fluid method applied to free surface boundaries in numerical geodynamic models. egusphere-2025-6547. https://doi.org/10.5194/egusphere-2025-6547 Version notes: V2 & V3: Name of package changed (e.g. in copyright statements & makefile), otherwise no change in software. V2 has a messed up file list so best to refer to V3.