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Updated: Jun 22, 2026

Flapping Soft Fin Deformation Modeling using Planar Laser-Induced Fluorescence Imaging

Flapping Soft Fin Deformation Modeling using Planar Laser-Induced Fluorescence Imaging

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

Summary

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.