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A Massively Parallel Method for the Full Waveform Inversion in Geophysics: Current Status and Perspectives

Calandra, Henri and Diouane, Youssef and Gratton, Serge and Vasseur, Xavier A Massively Parallel Method for the Full Waveform Inversion in Geophysics: Current Status and Perspectives. (2017) In: PASC'17 (Platform for Advanced Scientific Computing), 26 June 2017 - 28 June 2017 (Lugano, Switzerland). (Unpublished)

(Document in English)

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Solving nonlinear seismic inversion problems governed by wave propagation models based on partial differential equations is one of the most challenging procedures to obtain quantitative information of the subsurface in geophysics. Thus massively parallel solvers that scale up to million or billion of unknowns must be developed. In this talk, we describe our past and recent efforts to design and analyze parallel numerical algorithms for the solution of those large-scale nonlinear optimization problems on massively parallel platforms. In such a context, we have proposed block flexible Krylov subspace methods combined with a multigrid preconditioner to tackle the solution of the resulting large-scale linear systems with multiple right-hand sides. We also discuss current efforts toward the design and analysis of Krylov subspace methods (such as inexact or pipelined Krylov subspace methods with variable multilevel preconditioners) that are worth considering at the exascale level.

Item Type:Invited Conference
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Other partners > Total (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Université de Toulouse > Université Toulouse - Jean Jaurès - UT2J (FRANCE)
Université de Toulouse > Université Toulouse 1 Capitole - UT1 (FRANCE)
Laboratory name:
Deposited By: Xavier Vasseur
Deposited On:04 Apr 2018 09:35

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