Application of CHAD hydrodynamics to shock-wave problems [electronic resource].
- Published
- 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 58 : digital, PDF file
- Additional Creators
- Sandia National Laboratories and United States. Department of Energy. Office of Scientific and Technical Information
Access Online
- Restrictions on Access
- Free-to-read Unrestricted online access
- Summary
- CHAD is the latest in a sequence of continually evolving computer codes written to effectively utilize massively parallel computer architectures and the latest grid generators for unstructured meshes. Its applications range from automotive design issues such as in-cylinder and manifold flows of internal combustion engines, vehicle aerodynamics, underhood cooling and passenger compartment heating, ventilation, and air conditioning to shock hydrodynamics and materials modeling. CHAD solves the full unsteady Navier-Stoke equations with the k-epsilon turbulence model in three space dimensions. The code has four major features that distinguish it from the earlier KIVA code, also developed at Los Alamos. First, it is based on a node-centered, finite-volume method in which, like finite element methods, all fluid variables are located at computational nodes. The computational mesh efficiently and accurately handles all element shapes ranging from tetrahedra to hexahedra. Second, it is written in standard Fortran 90 and relies on automatic domain decomposition and a universal communication library written in standard C and MPI for unstructured grids to effectively exploit distributed-memory parallel architectures. Thus the code is fully portable to a variety of computing platforms such as uniprocessor workstations, symmetric multiprocessors, clusters of workstations, and massively parallel platforms. Third, CHAD utilizes a variable explicit/implicit upwind method for convection that improves computational efficiency in flows that have large velocity Courant number variations due to velocity of mesh size variations. Fourth, CHAD is designed to also simulate shock hydrodynamics involving multimaterial anisotropic behavior under high shear. The authors will discuss CHAD capabilities and show several sample calculations showing the strengths and weaknesses of CHAD.
- Report Numbers
- E 1.99:sand--98-1591
E 1.99: conf-9709141--proc.
conf-9709141--proc.
sand--98-1591 - Subject(s)
- Other Subject(s)
- Note
- Published through SciTech Connect.
12/31/1997.
"sand--98-1591"
" conf-9709141--proc."
"DE99000778"
5. joint Russian-American computational mathematics conference, Albuquerque, NM (United States), 2-5 Sep 1997.
O`Rourke, P.J.; Trease, H.E.; Sahota, M.S.
View MARC record | catkey: 14352263