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Research

modeling surface 
> water using the shallow water equations. Our sponsor was the Delta 
> Modeling group in DWR. We also had some collaboration with  Alex Bayen 
> at UCB and L'Ecole Polytechnique du Paris related to this project

 

 

ASCR Applied Mathematics Base Program

The goal of this DoE ASCR Applied Math project is to develop new algorithms for simulating complex systems that are represented by solutions to partial differential equations (PDE). Such systems are characterized by the presence of multiple physical processes, complex geometries, and multiple length and time scales. In our previous work, we have developed a number of new methods that are required to simulate a variety of complex systems. These include methods for treating problems with… Read More »

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Adaptive Dynamical Core for Climate Applications

We are implementing an atmospheric "dynamic core" for non-hydrostatic atmospheric flows using Chombo. It has a novel higher order time algorithm for thin atmospheres, and an adaptive conservative finite volume discretization of the cubed sphere. Funded under DoE BER's CSSEF program. Hans Johansen (lead) Phil Collela Peter McCorquodale, with Paul Ullrich (ANAG, UC Davis), Bill Collins (LBNL ESD), and Christiane Jablonowski (U Mich). Read More »

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BISICLES for Ice Sheet in Climate applications

Recent observations show that the Greenland and Antarctic ice sheets are losing mass at increasing rates. If recent trends continue, ice sheets will make a dominant contribution to the 21st century sea-level rise (SLR), far exceeding the projections of the IPCC's Fourth Assessment Report, AR4. Growing ice mass losses not only could raise sea level, but also could affect other parts of the climate system, such as the Atlantic Meridional Overturning Circulation and its associated poleward heat… Read More »

CACHE Project

The CACHE project is developing communication avoiding versions of geometric multigrid algorithms (see the SC 12 paper). ANAG is providing the code optimization, compiler transformation techniques and overall numerical implementations to optimize performance for emerging architectures. ANAG Members Brian Van… Read More »

D-TEC

D-TEC will define approaches to construct Domain Specific Languages (DSLs).  Different sorts of DSLs will be targets for this work; DSLs constructed from existing languages without syntax extension (embedded DSLs) and DSLs with syntax extension to existing base languages. D-TEC funded under the DOE OASCR X-Stack project.   ANAG's role is abstract numerical algorithm specification and interaction with the Exascale co-design centers, such as ExACT and CESAR. ANAG Members Phil Collela Brian Van… Read More »

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EFRC-NCGC: Reactive Transport for Carbon Sequestration

The Center for Nanoscale Control of Geologic CO2 is simulating subsurface pore scale models to explicitly resolve the key fluid-fluid (H2O and CO2) and fluid-solid interface. ANAG is contributing a new high performance simulation capability using EB Chombo, to develop new approaches for representing chemical kinetics and interfacial dynamics in Darcy scale numerical models (upscaling). David Trebotich (ANAG lead), Dan Graves, Terry Ligocki, Brian Van Straalen with Greg Miller (CRD/UCD), Mark Adams (Columbia Univ.), Carl Steefel (LBNL/ESD), Sergi Molins (LBNL/ESD). Read More »

Edge Simulation Lab for Plasma Fusion Modeling

The goal of this work is to develop high-resolution methods for solving continuum kinetic systems in complex phase space geometries. The motivating applications relevant to the DOE Office of Science include the solution of kinetic models of fusion edge plasmas, wherein the preponderant magnetic field requires the efficient discretization of a complicated four-, five-, or six-dimensional phase space. The techniques being investigated include conservative high-order methods based on the method… Read More »

FASTMath

ANAG is part of LBNL team for the FASTMath SciDAC Institute. We are scalable mathematical algorithms and software tools for high performance computing architectures, specifically using Chombo and EB Chombo. ANAG Members Phil Collela Daniel Graves Terry Ligocki Daniel Martin Peter McCorquodale Brian Van Straalen… Read More »

Institute for High-Performance Computational Science with Structured Meshes and Particles (HPCS-SMP)

HPCS-SMP is a conceptualization effort for the NSF SI2 program. It proposes an HPC simulation software Institute across multiple science grand challenge areas. Through a series of workshops with domain science simulation experts, we are identifying opportunities to leverage software infrastructure, expertise and collaboration between software developers and application scientists, to evolve new HPC grand challenge simulation capabilities in their fields. Work is a collaboration between… Read More »

XTUNE: Autotuning for Exascale: Self-Tuning Software to Manage Heterogeneity

XTUNE is tasked to develop the first unified autotuning framework that seamlessly integrates programmer-directed and compiler-directed autotuning, so that a programmer and the compiler system can work collaboratively to tune a code, unlike previous systems that place the entire tuning burden on either programmer or compiler. The proposed system will dramatically improve generality and usability of autotuning technology through an integrated, composable collection of tools, including an… Read More »

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Intel Parallel Computing Center for Climate Applications

We are implementing an atmospheric dycore ("dynamical core") for non-hydrostatic atmospheric flows using Chombo. It has a novel higher order time algorithm for thin atmospheres, and an adaptive conservative finite volume discretization of the cubed sphere. Funded under DoE BER's CSSEF program. Hans Johansen (lead) Phil Collela Peter McCorquodale, with Paul Ullrich (ANAG, UC Davis), Bill Collins (LBNL ESD), and Christiane Jablonowski (U Mich). Read More »