L-Sweeps: A scalable, parallel preconditioner for the high-frequency Helmholtz equation

15 Oct 2019 Taus Matthias Zepeda-Núñez Leonardo Hewett Russell J Demanet Laurent

We present the first fast solver for the high-frequency Helmholtz equation that scales optimally in parallel, for a single right-hand side. The L-sweeps approach achieves this scalability by departing from the usual propagation pattern, in which information flows in a 180 degree cone from interfaces in a layered decomposition... (read more)

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  • NUMERICAL ANALYSIS
  • NUMERICAL ANALYSIS