` ESA space debris studies: hypervelocity impact sample Photo Published on Twitter 12/4/21 Recent Experiments by European Space Agency Highlight Importance of Hydrocode Modeling PISALE simulations of off-normal impact of steel projectile on Al capture full 3D affects ABSTRACT: The solution of partial differential equations (PDEs) on modern HPC platforms is essential to the continued success of research and modeling for a wide variety of areas, especially groundwater flow and transport modeling in Pacific islands. The project implements an innovative combination of advanced mathematical techniques of Arbitrary Lagrangian Eulerian (ALE) methods with Adaptive Mesh Refinement (AMR), including parallel software tools to dynamically adapt the grids and special Lagrangian-flow methods that allow for the simulation of complex regional groundwater flow with dynamic freshwater and seawater interaction in heterogeneous volcanic rocks. The PISALE (Pacific Island Structured-AMR with ALE) software aims at a publicly available sustainable branch of the software and will provide accurate and scalable simulations of complex groundwater flow processes in the Hawaiian islands. The status of our ongoing project will be presented with student involvement, course development, and future plans. Other applications of PISALE are discussed as well. Student Involvement, Broader Impact, and Future Plans Course Development UH CEE 696-003 “Advanced Modeling in Groundwater Engineering” was offered in Fall 2022. The course delivered the concept/theory of ALE-AMR with a few PISALE applications. Future Plans • Flow module will be added and coupled with solute transport equations • The accuracy and scalability for island-scale freshwater-seawater interaction application will be tested Groundwater Flow and Transport Application in Hawaiian Aquifers Preliminary Results Motivation Kona, HI from NSF ‘Ike Wai project Rotzoll et al., 2010 Groundwater is the major source for public supply in Hawaiʻi. Groundwater resources exist as freshwater lens floated on top of seawater. However, groundwater availability is limited by recharge/precipitation and seawater intrusion. Current drought conditions and future sea level rise will impact the freshwater resources in Hawaiʻi. The PISALE project will support island-scale numerical simulation of density-driven flow and transport : 1. to evaluate groundwater availability 2. to design sustainable water use planning 3. to understand the effect of climate change and sea level rise on island water resources Mathematical Model for Density-Driven Flow Groundwater Flow head h(ρ), velocity v (LLNL’s MFEM) Salt Transport c(v) Methodology Flow and Transport with Heterogeneous Hydraulic Conductivity Field t = 0 [yr] t = 12.6 [yr] t = 25.2 [yr] PI Koniges hosted a PISALE workshop for researchers from U of Minnesota during ICCFD11 (left). Outreach efforts on Maui where PI Koniges and colleagues show current and old HPC hardware to local students (Right) Additional and Proposed PISALE Applications Seeded by NSF Funding • As a direct result of our NSF CSSI funded project we now have new application areas using the PISALE Framework: ALE (Arbitrary Lagrangian Eulerian) dynamics and structured AMR (Adaptive Mesh Refinement) Experiment Workshop & Outreach: Acknowledgement We would like to thank many additional members of the PISALE team. The PISALE code applications are supported by the National Science Foundation, under Office of Advanced Cyber Infrastructure Award Number 2005259, the U.S. Department of Energy, Office of Science, under Fusion Energy Sciences Research Division Award Number DE-SC0021374, and the Office of Naval Research, under ONR MURI Award Number N00014- 20-1-2682. This research used resources of the National Energy Research Scientific Computing Center (NERSC), a U.S. Department of Energy Office of Science User Facility located at Lawrence Berkeley National Laboratory, operated under Contract No. DE-AC02-05CH11231 using NERSC awar