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1431 Computational Shock and Multiphysics
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Guglielmo Scovazzi

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SUPG-stabilized shock hydrodynamics Next topic

Two-dimensional Sedov blast on a triangular mesh. Color represents density contours. Displacements are depicted by the deformation of the dark grid.
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].


References:
[1]

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]
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]
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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