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Table 6 Settings for multigrid hierarchies embedded in the hybrid preconditioner

From: A hybrid interface preconditioner for monolithic fluid–structure interaction solvers

Field

Fine level

Medium levels

Coarse level

Chebyshev(6)

Chebyshev(12)

LU

SGS\((5\times 0.69)\)

SGS\((3\times 0.69)\)

LU

Chebyshev(6)

Chebyshev(12)

LU

  1. For solid and ALE Chebyshev smoothers are used on the fine and medium levels, while for the fluid five and three sweeps of damped symmetric Gauß–Seidel are employed on the fine and medium levels, respectively.
  2. In all fields, a direct solver is used on the coarsest level