Examples

Consortium for Open Multiphysics

Example Problems

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Elastic Piston

Problem

• Fully coupled impulsive acceleration of fluid-solid interface
• Fluid component
  • 1 m cube, pressurized to 1.5e5 Pa
• Solid component
  • 1 m cube, initially stress free

Mesh

Results

Solid Wave Propogation

Fluid Wave Propogation

References

• Jaiman R., Geubelle P., Loth E., Jiao X., 2011. "Combined interface boundary condition method for unsteady fluid–structure interaction," Computer Methods in Applied Mechanics and Engineering, 200, pp. 27-39.

• Jaiman R., Jiao X., Geubelle P., Loth E., 2005. International Journal for Numerical Methods in Engineering, Volume 64, Issue 15, pp. 2014 - 2038.

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Super Seismic Shock

Problem

• Shock wave propagation causes deformation of and shock wave in solid
• Shock in a compressible fluid travels at a speed that exceeds the dilational wave speed in a solid
• Solid material properties are similar to copper
• Fluid material properties are modified to get a sound speed similar to the dilational wave speed
• Deformation of the solid is due to high pressures behind the shock
• Analytical similarity solution exists

Results

References

• Arienti M., Hung P., Morano E., Shepherd J., 2003. “A Level Set Approach to Eulerian–Lagrangian Coupling,” Journal of Computational Physics, Vol. 185, pp. 213-251.
• Jaiman R., Jiao X., Geubelle P., Loth E., 2004. “Assessment of Conservative Load Transfer for Fluid-Solid Interface with Nonmatching Meshes,” International Journal for Numerical Methods in Engineering, 0; pp.1-40.

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Shock Panel

Problem

• Mach 1.2 shock in air impacts a deforming panel
• Material properties of interest
  • Pressure drop across panel
  • Panel (l,e) = (length,thickness)
  • Elastic modulus
  • Panel density
• Quantities of interest:
  • Max tip displacement
  • Panel frequency

Results

Fluid

Structures

Coupled

Reference

Giordano J., Jourdan G., Burtschell Y., Medale M., Zeitoun D., Houas L., 2005. "Shock wave impacts on deforming panel, an application of fluid-structure interaction," Shock Waves, Vol. 14, Issue 1, pp. 103-110.

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