[Faculty] Fwd: [CSRC-SDSU COLLOQUIUM]: Modeling of aerodynamics of flapping wings and blades using Lattice Boltzmann method and high-order of approximation numerical schemes

[Jose Castillo]

*DATE:*  Friday, October 9, 2015

*TITLE:*  Modeling of aerodynamics of flapping wings and blades using
Lattice Boltzmann method and high-order of approximation numerical schemes

*TIME:*  3:30 PM

*LOCATION:*  GMCS 214

*SPEAKER:*  Dr. Alex Povitsky. Department of Mechanical Engineering,
University of Akron

*ABSTRACT:*  Numerical model of aerodynamics of flapping wing in
generalized pitching motion has been developed based on the high-order
compact approximation of derivatives in Navier-Stokes equations,
non-inertial coordinate system attached to the moving wing, and carefully
tuned non-uniform grid. Comparison of numerical results for pitching and
plunging wing with the experimental data at Re=10000 showed good
qualitative agreement for the streamwise velocity and vorticity. Next, the
aerodynamics of sets of flapping blades is explored for possible use in
turbo-machinery compressors. The computational approach to model flapping
blades in confined space is based on a novel particle-based kinetic Lattice
Boltzmann method (LBM). Commercial LBM-based CFD software XFlow has been
adopted to handle complex multi--body motion thus avoiding classic domain
meshing needed by finite-volume computations. The user can control the
local level of refinement of the underlying lattice in near-wing boundary
layer and in street of vortices behind the wing. Selected values of
governing parameters of single and paired flapping blades include blade
profile and thickness, amplitude of plunging, angular amplitude of
pitching, phase difference between plunging and pitching, distance between
blades and phase difference between motions of two blades in parallel
setting.

*HOST:*  Dr. Jose Castillo

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http://www.csrc.sdsu.edu/colloquium.html

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Computational Science Research Center

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San Diego State University

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 http://www.csrc.sdsu.edu/mimetic-book/
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