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Code of Conduct

NERSC Initiative for Scientific Exploration (NISE) 2011 Awards

Towards High Performance Urban Canopy Flows

Joe Prusa, Teraflux Corporation

Associated NERSC Project: Continuous Dynamic Grid Adaptation in a Global Atmospheric Model (m612)
Principal Investigator: William Gutowski, Iowa State University

NISE Award: 400,000 Hours
Award Date: March and June 2011

Advanced and flexible modeling capabilities that enable the simulation of polliution transport and dispersion processes possible in complex terrain and urban environments are of interest because the potential effect of chemical and biological agent release on the population within the cities is still a serious concern.

The aim of this proposal is to advance an efficient and scalable approach for pollution transport and dispersion (T&D) within complex urban environments. The urban canopy introduces strong multiscale inhomogeneities spanning spatial scales from sub-meter to kilometers and beyond.

The specific nature of the T&D problem requires relatively high resolution for the simulations to resolve small scale turbulence near the buildings and the effectively long time scale required to capture transport of the pollutants in the full extent of real cities. An Immersed Boundary (IMB) method is used to represent building effects in the model grid. Transport of pollutants is done with either passive tracer or a heavy particle approach which in practice uses a computationally demanding bin model to represent a distribution of particle properties.

In this project we plan to use the multi-scale multi-physics model EULAG which has already been demonstrated to work efficiently upwards of thousands of processors on a variety of high-end architectures. Because urban canopy problems require significant spatial resolution and large domain scales, they are computationally demanding and require extremely efficient use of the largest available resources. Therefore we intend to advance the performance of the current model algorithms in the range of 20K to 100K processor cores, especially paying attention to increasing the peak performance while maintaining high model scalability.

Table of Contents

  1. Overview
  2. New potential energy surface for ozone molecule
  3. Hybrid OpenMP/MPI approach to R-matrix scattering
  4. Global Effects on the Dynamics of Plasmoids and Flux Ropes During Magnetic Reconnection
  5. MD Simulations of Liquid Water Films at the Boundary Between Gas Hydrate and Mineral Surfaces
  6. Systems Biology Knowledge Base
  7. Sparse Lanczos and GMRES Solvers in Co-Array Fortran (CAF)
  8. Numerical Study of Mode Conversion and Ion Heating in Laboratory-Relevant Plasmas
  9. Large Scale Numerical Study of Bootstrap Current in Edge Pedestal Plasma
  10. Ab initio simulation of mechanical properties of bulk metallic glass and Mo-bases alloys
  11. Improving Algorithms and Resolution for the Ocean-Atmosphere Reanalysis for Climate Applications OARCA (1850-2012)
  12. High resolution modeling to identify the location of the meltwater flood responsible for the Younger Dryas cold episode
  13. Numerical Investigations of Symmetry Breaking, Magnetism and the Pseudogap in the Three-Orbital Hubbard Model
  14. Breaking Magnetic Field Lines with Turbulence
  15. Development of CALPHAD type approach to thermal conductivity aided by first-principles phonon approach
  16. An Efficient Real-Space Approach to Calculating Auger Spectra
  17. Surface Instabilities and Subgrid Scale Models in Computational Fluid Dynamics
  18. Self-Healing of Polymer Films
  19. Computational Studies of Methanol Steam Reforming
  20. Laser Acceleration of Ions Using Few Times Critical Density Gas Targets
  21. An Integrative Strategy to Model Complex Biological Assemblies
  22. Unveiling Microbial Carbon Cycling Processes in Key U.S. Soils using "omics"
  23. Semiclassical Approaches for Clean Energy Resources
  24. Tall Tower Wind Energy Monitoring and Numerical Model Validation in Southern Nevada
  25. Threading EnergyPlus Using OpenMP
  26. First-Principles Calculation of Phonon-Assisted Optical Absorption in Indirect-Band-Gap Semiconductors.
  27. Deep Defect States and Valence Skipping in Narrow Band Gap Semiconductors
  28. Material Simulations in Joint Center for Artificial Photosynthesis (JCAP)
  29. High Fidelity Study of Multiscale Multiphase Lubricant Flow in High-Speed Gear Systems
  30. Semiclassical Approaches for Clean Energy Resources
  31. First Principles Characterization of van der Waals Dispersion Interactions
  32. Simulating ETG Plasma Turbulence with Impurities
  33. Coupled Electronic and Nuclear Dynamics in Enzymes and Photocatalysts
  34. Proton-coupled electron transfer in photocatalysis and protein translocation in biosynthesis: Bridging lengthscales and timescales in molecular simulation
  35. Three Dimensional Models for Martensitic Phase Transformations
  36. Molecular Simulations of the Release of Phosphate and ADP from F1-ATPase to Aid in the Understanding of the Function of F1-ATPase
  37. Turbulence over Complex Terrain: A Wind Energy Perspective
  38. Performance Enhancements for Three-Dimensional Fast Fourier Transforms Library P3DFFT
  39. Accelerated Materials Design Towards the Materials Genome
  40. Triple Photoionization of the Li atom
  41. Implementation of C-MAD Parallel Code to Include New Physics and Capabilities for Future Particle Colliders
  42. Morphology of Young Core-Collapse Supernova Remnants from Multi-Physics Three-Dimensional Simulations
  43. Large High-Resolution Galaxy Simulation Program
  44. Towards High Performance Urban Canopy Flows
  45. Evaluating PGAS scientific graph analysis codes on the Gemini interconnect
  46. Representing Convective Clouds in Global Circulation Models
  47. Simulation of Inelastic Decoherence in Electronic Transport Through Nanoscale Structures
  48. Improving Scalability of an Eigensolver for the Kohn-Sham Electronic Structure Problem
  49. Phonon, thermodynamic and diffusion properties of lithium-ion batteries from first-principles calculations
  50. CACHE novel architecture research
  51. High performance simulation of reactive transport processes at the pore scale
  52. First-Principles Calculations of Multiferroic Oxides
  53. High resolution integration of CAM5 for extreme weather research
  54. Modeling and Simulation of High Dimensional Stochastic Multiscale PDE Systems at the Exascale
  55. Theoretical Investigation on the Properties of Energy Materials
Last edited: 2024-10-03 19:38:24
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