ALEGRA -- A massively parallel h-adaptive code for solid dynamics [electronic resource].
- Albuquerque, N.M. : Sandia National Laboratories, 1997.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- pages 54 : digital, PDF file
- Additional Creators:
- Sandia National Laboratories
United States. Department of Energy. Office of Scientific and Technical Information
- ALEGRA is a multi-material, arbitrary-Lagrangian-Eulerian (ALE) code for solid dynamics designed to run on massively parallel (MP) computers. It combines the features of modern Eulerian shock codes, such as CTH, with modern Lagrangian structural analysis codes using an unstructured grid. ALEGRA is being developed for use on the teraflop supercomputers to conduct advanced three-dimensional (3D) simulations of shock phenomena important to a variety of systems. ALEGRA was designed with the Single Program Multiple Data (SPMD) paradigm, in which the mesh is decomposed into sub-meshes so that each processor gets a single sub-mesh with approximately the same number of elements. Using this approach the authors have been able to produce a single code that can scale from one processor to thousands of processors. A current major effort is to develop efficient, high precision simulation capabilities for ALEGRA, without the computational cost of using a global highly resolved mesh, through flexible, robust h-adaptivity of finite elements. H-adaptivity is the dynamic refinement of the mesh by subdividing elements, thus changing the characteristic element size and reducing numerical error. The authors are working on several major technical challenges that must be met to make effective use of HAMMER on MP computers.
- Published through SciTech Connect.
5. joint Russian-American computational mathematics conference, Albuquerque, NM (United States), 2-5 Sep 1997.
Summers, R.M.; Wong, M.K.; Weatherby, J.R.; Boucheron, E.A.
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