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This content will become publicly available on December 22, 2018

Title: Adaptive time stepping for fluid-structure interaction solvers

In this work, a novel adaptive time stepping scheme for fluid-structure interaction (FSI) problems is proposed that allows for controlling the accuracy of the time-discrete solution. Furthermore, it eases practical computations by providing an efficient and very robust time step size selection. This has proven to be very useful, especially when addressing new physical problems, where no educated guess for an appropriate time step size is available. The fluid and the structure field, but also the fluid-structure interface are taken into account for the purpose of a posteriori error estimation, rendering it easy to implement and only adding negligible additional cost. The adaptive time stepping scheme is incorporated into a monolithic solution framework, but can straightforwardly be applied to partitioned solvers as well. The basic idea can be extended to the coupling of an arbitrary number of physical models. Accuracy and efficiency of the proposed method are studied in a variety of numerical examples ranging from academic benchmark tests to complex biomedical applications like the pulsatile blood flow through an abdominal aortic aneurysm. Finally, the demonstrated accuracy of the time-discrete solution in combination with reduced computational cost make this algorithm very appealing in all kinds of FSI applications.
 [1] ;  [2] ;  [3]
  1. Sandia National Lab. (SNL-CA), Livermore, CA (United States); Technical University of Munich (Germany). Mechanics & High Performance Computing Group
  2. Technical University of Munich (Germany). Institute for Computational Mechanics
  3. Technical University of Munich (Germany). Mechanics & High Performance Computing Group
Publication Date:
Report Number(s):
Journal ID: ISSN 0168-874X; 658108
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Finite Elements in Analysis and Design
Additional Journal Information:
Journal Volume: 141; Journal Issue: C; Journal ID: ISSN 0168-874X
Research Org:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
97 MATHEMATICS AND COMPUTING; Fluid-structure interaction; Time integration; Error estimation; Adaptivity
OSTI Identifier: