[Caluca]

For more than a decade the wave-ray multigrid algorithm has been developed which is capable of solving the Helmholtz equation as efficient as standard multigrid would solve the Poisson equation. However how far does the applicability of wave-ray multigrid stretch? Could it be applied on

1 the Euler equations (fluid dynamics)
2 Euler-Bernoulli equations (solid dynamics)
3 combination of both (fluid-structure interaction)

more efficiently than standard multigrid?