Overview
?Efficient and accurate solution of blast problems
–Multi-dimensional implementation of the explicit FCT (Flux Corrected Transport) formulation of Boris & Book
?Rectangular cells aligned with coordinate directions
–Grid can be graded
?Hydrodynamic inviscid flow
–Single ideal gas per Part
?No void regions
?Unused regions can model rigid structures
?In-flow and Out-flow boundaries
?Joined Parts
?Coupling to Lagrange solvers
?Extensive Remapping options
Example: Urban Blast
?Detonation and expansion of 1000kg charge initially modelled as a 1D spherical calculation using the AUTODYN 2D multi-material Euler solver
–Models the detonation of the explosive accurately
–Uses a very high resolution mesh
?Results are remapped into an AUTODYN 3D Ideal Gas Solver mesh as initial conditions
–At large expansions, detonation products behave like air, so HE and Air can be combined into a single material (Air)
?Allows assessment of the effects of building confinement on the propagation of blast waves
1D Spherically Diverging Detonation Wave
(AUTODYN 2D Multi-material Euler Solver)
Example: Explosion in a Building
Refine and Block Remap
?Refine lets you refine a rectilinear 3D mesh by subdividing existing cells into multiple cells
–You specify the number of subdivision to be used in the I, J and K directions
–Primarily used for Euler FCT meshes, but can also be used for Lagrange, ALE and MM Euler
?Block Remap performs a fast remap from a refined mesh to the unrefined mesh
http://www.cadfamily.com/html/Article/ANSYS%20AUTODYN-Euler%20Blast%20(Ideal%20Gas)%20Solver_629_1.htm
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