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Flapping Soft Fin Deformation Modeling using Planar Laser-Induced Fluorescence Imaging
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Published on: April 28, 2022

Flow around fishlike shapes studied using multiparticle collision dynamics.

Daniel A P Reid1, H Hildenbrandt, J T Padding

  • 1Theoretical Biology, Rijksuniversiteit Groningen, Haren, The Netherlands.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|June 13, 2009
PubMed
Summary
This summary is machine-generated.

Multiparticle collision dynamics is a suitable mesoscale method for studying fish hydrodynamics. This new model accurately simulates fluid flow around stiff, fish-like shapes and splitter plates.

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Area of Science:

  • Fluid Dynamics
  • Computational Physics
  • Biophysics

Background:

  • Empirical measurement of fish hydrodynamics is challenging.
  • Mesoscale modeling offers a potential solution for studying fluid dynamics.
  • Multiparticle collision dynamics (MPCD) is a recently developed mesoscale method.

Purpose of the Study:

  • To investigate the suitability of multiparticle collision dynamics for modeling fish hydrodynamics.
  • To assess the accuracy of MPCD for simulating fluid flow around stiff, fish-like objects.
  • To explore the effects of splitter plates on the hydrodynamics of various shapes at intermediate Reynolds numbers.

Main Methods:

  • Utilized multiparticle collision dynamics (MPCD) for simulations.
  • Compared MPCD results with published numerical simulations of fish and tadpole shapes.
  • Investigated the hydrodynamic effects of splitter plates on circular cylinders and other shapes.
  • Measured flow separation angles around a circular cylinder.
  • Adjusted boundary conditions and flow driving methods within the MPCD framework.

Main Results:

  • MPCD simulations showed good agreement with existing numerical data for fish-like shapes.
  • The model accurately reproduced hydrodynamic consequences of splitter plates for various geometries.
  • Flow separation angles around a circular cylinder were consistent with empirical data.
  • Adjustments to boundary conditions and flow driving improved model performance.

Conclusions:

  • Multiparticle collision dynamics is a viable and accurate method for empirical hydrodynamic studies of swimming fish.
  • The model's ability to simulate flow around complex shapes and splitter plates validates its utility.
  • MPCD provides a valuable tool for advancing our understanding of fish locomotion and fluid-structure interactions.