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    3D multi-source CSEM simulations: Feasibility and comparison of parallel direct solvers

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    Authors
    Puzyrev, Vladimir
    Koric, S.
    Date
    2015
    Type
    Conference Paper
    
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    Citation
    Puzyrev, V. and Koric, S. 2015. 3D multi-source CSEM simulations: Feasibility and comparison of parallel direct solvers, in SEG Technical Program Expanded Abstracts 2015, pp. 833-838. Society of Exploration Geophysicists.
    Source Title
    SEG Technical Program Expanded Abstracts
    DOI
    10.1190/segam2015-5864005.1
    ISSN
    1052-3812
    School
    Department of Applied Geology
    URI
    http://hdl.handle.net/20.500.11937/53312
    Collection
    • Curtin Research Publications
    Abstract

    Modern numerical algorithms for computational electromagnetics lead to many large sparse systems of linear equations. Their solution takes up to 90% of the total computational time in the geophysical inversion process. This paper provides evaluation and comparison of several state-of-the-art direct solvers in a massively parallel environment. We determine the largest complex systems that can be solved today with these methods and evaluate their performance and scalability on one of the world's most powerful supercomputers. Small sensitivity of direct methods to the number of sources, modeling frequency and conductivity distribution in the subsurface is confirmed. The results show the potentials and limitations of different parallel implementations on a petascale high-performance computing system.

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