Research in Parallel Algorithms and Software for Computational Aerosciences

Details

• Creators:
  Domel, Neal D.
• Corporate Publisher:
  Ames Research Center ; Lockheed Martin
• Corporate Contributors:
  Lockheed Martin. Tactical Aircraft Systems ; Ames Research Center
• Subject/TRT Terms:
  • Computer algorithms
  • Computer architecture
  • Computer programming
  • Parallel processing
  • Programming (Mathematics)
  • Mainframe computers
  • Computer networks
  • Cartesian grid techniques
  • Computational Fluid Dynamics (CFD) parallel code
  • Parallel Virtual Machine (PVM)
  More +
• Publication/ Report Number:
  Report NAS-96-004
• DOI:
  https://doi.org/10.21949/1404009
• Resource Type:
  Research Paper
• Geographical Coverage:
  United States
• Description:
  Phase I is complete for the development of a Computational Fluid Dynamics with automatic grid generation and adaptation for the Euler analysis of flow over complex geometries. SPLITFLOW, an unstructured Cartesian grid code developed at Lockheed Martin Tactical Aircraft Systems, has been modified for a distributed memory/massively parallel computer environment. The parallel code is operational on an SGI network, Cray J90 and C90 vector machines. SGI Power Challenge, and Cray T3D and IBM SP2 massively parallel machines. Parallel Virtual Machine (PVM) is the message passing protocol for portability to various architectures. A domain decomposition technique was developed which enforces dynamic load balancing to improve solution speed and memory requirements. A host/node algorithm distributes the tasks. The solver parallelizes very well, and scales with the number of processors. Partially parallelized and non-parallelized tasks consume most of the wall clock time in a very fine grain environment. Timing comparisons on a Cray C90 demonstrate that Parallel SPLITFLOW runs 2.4 times faster on 8 processors than its non-parallel counterpart auto tasked over 8 processors. Funded by NASA Ames Research Center under contract NAS2-14057.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/12529/dot_12529_DS1.pdf
• File Type:
  [PDF - 348.32 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:0fcc2ba17723705858e8a36e8db089c6824d646ee667a7de337de8d494d9a1a10cfa2969f9db0a53efa7fcaa6bbcd605de597ff8ec88357b7f2615acbd76d629