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| SUPG-stabilized shock
hydrodynamics |
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Two-dimensional Sedov blast
on a triangular
mesh. Color represents density contours. Displacements
are depicted by the
deformation of the dark grid.
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Shock
hydrodynamics
algorithms for gas dynamics applications have traditionally performed
poorly on triangular or tetrahedral meshes. However, simplex-type
meshes are very important in industrial computations, since they allow
for automatic mesh generation, with a considerable reduction in the
overall design turn-around time. In addition, simplicial meshes are
usually preferred in problems involving radiation effects. A newly
developed method in the context of SUPG stabilization for nodal-based
finite element discretizations has been successfully applied in
Lagrangian computations [ 1, 2].
Numerical results show very good
agreement with state-of-the-art methods on quadrilateral or hexahedral
meshes, as well as triangular or tetrahedral meshes. In particular,
because a piecewise linear interpolation is used for the thermodynamic
variables, problematic issues related to pressure gradient
representation are easily bypassed [ 1].
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References:
[1]
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Guglielmo
Scovazzi, Mark A.
Christon, Thomas J. R.
Hughes, and John N. Shadid, "Stabilized shock hydrodynamics: I. A
Lagrangian method", SAND-2005-7563J
(Comp. Meth. Appl. Mech. Eng., 196(4-6),
Jan. 2007, pp.
923-966). |
[2]
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Guglielmo
Scovazzi, "Stabilized shock hydrodynamics: II. Design and
physical interpretation of the SUPG operator for Lagrangian
computations", SAND-2005-7747J
(Comp. Meth. Appl. Mech. Eng., 196(4-6),
Jan. 2007, pp.
967-978). |
[3]
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Guglielmo
Scovazzi, Ph.D. thesis, part I,
"Multiscale Methods in
Science and Engineering", Mechanical Engineering Department, Stanford
University, August 2004. PDF file |
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Guglielmo at CSRI.
Contact
E-mail: gscovaz@sandia.gov
(505) 844-0707 (Phone)
Mailing address (USPS)
Sandia National Laboratories
P.O. Box 5800, MS 1319
Albuquerque, NM 87185-1319
FedEx/UPS/DHL
Sandia National Laboratories
1515 Eubank SE,
CSRI Building, Room 311
Albuquerque, NM 87123-1319
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