LAGHOST: Development of Lagrangian High-Order Solver for Tectonics

Explore the development of LAGHOST (Lagrangian High-Order Solver for Tectonics) in this 46-minute seminar presented by Sungho Lee from the University of Memphis. Delve into the challenges of simulating long-term geological and tectonic processes using a Lagrangian frame, and discover how LAGHOST addresses limitations in existing solvers. Learn about the incorporation of advanced features such as MPI parallelization, GPU acceleration, high-order elements, and adaptive grid refinement. Examine the implementation of viscoelastoplastic rheology and key components like constitutive equations, body force, mass scaling, and Mohr-Coulomb plasticity. Follow the evaluation of LAGHOST through four benchmark tests, including elastic box compression and self-weighted elastic column compaction. Understand the application of dynamic relaxation techniques to achieve quasi-static solutions and larger time-step sizes. Witness the successful simulation of normal fault evolution, showcasing the solver's capability to model significant tectonic phenomena. Gain insights into the ongoing development of this user-friendly, MFEM-based tectonic solver designed to advance research in mountain building, mantle convection, and related geological processes.