COMPARISONS OF 2 DIFFERENT MIXED EULERIAN-LAGRANGIAN SCHEMES BASED ONA STUDY OF FLARE-SLAMMING HYDRODYNAMICS

A comparative study of two different mixed Eulerian-Lagrangian methods is presented. Representative numerical simulations of oscillatory fla re-slamming flows are given. Computations based on these two different numerical schemes, i.e., a desingularized method using Rankine ring s ources and a source-doublet panel method (e.g., USAERO/FSP(C)), are co mpared with experiments. Fourier coefficients of the simulated time hi stories and experimentally measured forces are given for detailed erro r comparisons. The numerical simulations demonstrates the ranges of ap plicability of these two methods. Both are shown to be efficient and r obust time-stepping schemes for the fully nonlinear free-surface probl em studied here.