~~NOTOC~~
====== Fluid-Structure Interaction ======

  * **Solver**: LAMMPS with the USER-SMD package

  * **Method**: 
    * Solids: 
      * Total Lagrangian SPH to eliminate the tensile instability
      * Anti-hourglass control to reduce zero-energy modes
    * Fluid: Classical SPH

  * **Material**:
    * Solids: elastic perfectly plastic
    * Fluid: inviscid and compressible (Tait equation)

  * **Interaction**: repulsive Hertzian force

  * **Post-processing**: ParaView

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