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In 2011 NASA Langley completed the construction of a Hydro Impact Basin next to an existing gantry which allows testing of articles for water impact with both horizontal and vertical velocities. NASA Langley engineers use simulation in conjunction with the new testing facilities to evaluate water landings for space vehicles.
To better understand Radioss’s Fluid Structure Interaction (FSI) capabilities, a blind benchmark of a water impact test of a 20 inch sphere was conducted. Both Arbitrary Lagrangian Eulerian (ALE) and Spherical Particle Hydrodynamics (SPH) were considered. Options for material modeling of the water were also evaluated.
The Radioss results were then compared to existing test results looking at decelerations and pressure traces.