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A Dynamically Adaptive Lattice Boltzmann Method for Flapping Wing Aerodynamics

[+] Author Affiliations
Stephen L. Wood

University of Tennessee - Knoxville, Knoxville, TN

Ralf Deiterding

German Aerospace Center (DLR), Göttingen, Germany

Paper No. AJKFluids2015-13802, pp. V01AT13A008; 7 pages
doi:10.1115/AJKFluids2015-13802
From:
  • ASME/JSME/KSME 2015 Joint Fluids Engineering Conference
  • Volume 1A: Symposia, Part 2
  • Seoul, South Korea, July 26–31, 2015
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-5721-3
  • Copyright © 2015 by KSME

abstract

The essential components of a parallel dynamically adaptive lattice Boltzmann method coupled to a 6-degree-of-freedom rigid body motion solver are presented. This Cartesian approach with automatic fluid meshing is particularly well suited for simulating the interaction of low Reynolds number flows and moving structures with good accuracy and high computational performance. The fully coupled fluid-structure simulation method is demonstrated for the experiment of a two-segment hinged wing with torsion damper by Toomey & Eldredge, a simplistic model of a flapping wing in air. A grid convergence study assesses the prediction accuracy of the overall method and required CPU times. Our computations show very good agreement with measurements of the evolving hinge angle by Toomey & Eldredge; forces and moments are predicted with an error margin of generally <5% with respect to their computational results.

Copyright © 2015 by KSME

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