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Fast Implicit Simulation of Oscillatory Flow in Human Abdominal Bifurcation Using a Schur Complement Preconditioner

  • K. Burckhardt
  • D. Szczerba
  • J. Brown
  • K. Muralidhar
  • G. Székely
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5704)

Abstract

We evaluate a parallel Schur preconditioner for large systems of equations arising from a finite element discretization of the Navier-Stokes equations with streamline diffusion. The performance of the method is assessed on a biomedical problem involving oscillatory flow in a human abdominal bifurcation. Fast access to flow conditions in this location might support physicians in quicker decision making concerning potential interventions. We demonstrate scaling to 8 processors with more than 50% efficiency as well as a significant relaxation of memory requirements. We found an acceleration by up to a factor 9.5 compared to a direct sparse parallel solver at stopping criteria ensuring results similar to a validated reference solution.

Keywords

Aortic aneurysm flow simulation streamline diffusion FEM indefinite matrix parallel Krylov solver 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • K. Burckhardt
    • 1
  • D. Szczerba
    • 1
    • 2
  • J. Brown
    • 3
  • K. Muralidhar
    • 4
  • G. Székely
    • 1
  1. 1.Department of Electrical EngineeringETHZürichSwitzerland
  2. 2.IT’IS Foundation for ResearchZürichSwitzerland
  3. 3.Laboratory of Hydraulics, Hydrology and GlaciologyETHZürichSwitzerland
  4. 4.Department of Mechanical EngineeringIIT KanpurIndia

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