Planar shock in steel canister

This application simulates a planar shock in air traveling within a steel canister. The canister has a length of 3.0 m, inner radius of 0.7 m, and outer radius of 1.0 m. The position of the end cap of the canister is artificially fixed in order to withstand the pressure loading of the shock when it reaches the closed end of the canister. The canister is simulated using Dyna3d finite elements with an approximate mesh resolution of 10 cm. The shock is modeled using the standard Clawpack interface provided by AMROC for Eulerian-Lagrangian coupled simulation with the ghost-fluid method. The inner surface of the canister is treated as a fluid-solid interaction boundary. The fluid AMR mesh uses a base mesh resolution of 4 cm with one or two levels of refinement. The fluid simulation bounding box begins well within the open end of the canister in order to avoid any ambiguities with the CPT (closest-point transform) algorithm. The remainder of the fluid bounding box lies within the canister material and between the inner and outer radii of the canister. One must take care to adjust the canister material strength and the initial shock amplitude such that the canister inner surface does not bulge out beyond the fluid simulation bounding box. Alternatively, one could treat the entire surface of the canister as a fluid-solid interaction boundary, enlarge the fluid simulation domain to encompass the entire canister, and place ambient air outside the canister.

-- JulianCummings - 02 Feb 2007