Published October 27, 2022 | Version v1
Dataset Open

Data set for bionic simulation of double clap-and-fling wing mechanism with SPH FSI method

  • 1. University of Electronic Science and Technology of China
  • 2. Delft University of Technology


Data set containing the rigid-body based flapping wing models coupled with smoothed particle hydrodynamics (SPH), by means of DualSPHysics version 5.0 and Project Chrono.

These models are part of the paper:

Yanwei Zhang, Zhonglai Wang, Saullo G. P. Castro. Bionic simulation of double clap-and-fling wing mechanism with SPH FSI method. EngXriv Preprint, 2022. DOI: 10.31224/2652

File "" contains the simulation files.

File "" contains the compiled DualSPHysics software.

Procedure to run the simulations on a Windows machine:

  • Working directory: .\simulations\flappingwing\case01
  • Step 1: Obtain rigid bodies by modeling of SOLIDWORKS and Macro command of FreeCAD (e.g. external_wing111.stl)
  • Step 2: Run ".bat" file (e.g. flapping01.bat) to start simulation and force acquisition
  • Step 3: Revise ".bat" and ".xml" (e.g. flapping01.bat and flapping01_Def.xml)to adapt to the next case. If required, change the model and Macro command of step 1. Common modification items:

<geometry>-<definition> <floatings>- <floating><angularvel> <floatings>- <floating><property> <properties>-<propertyfile> <initials> <execution>-<special>-<chrono> <execution>-<special>-<inout> <parameters> 

  • Step 4: Run "Filter.m" to handle force data by filters. Step 5: Compare forces of all cases. PS: Other files are revised function files derived from DualSPHysics 5.0.


Abstract: Three-dimensional numerical simulations of flexible flapping wings based
on the fluid-structure interaction in biological and bioinspired flow have become a
vibrant and challenging research topic. The present paper focuses on a parametric
study of the aerodynamic performance of a bionic flexible clapping wing. The proposed
model deforms the wing in spanwise and chordwise directions based on the six rigid
bodies connected along the wing veins using ball links and springs. Unsteady effects of
flapping wing micro air vehicles with a double clap-fling configuration are investigated
using an air-solid interaction model based on smoothed particle hydrodynamics and
rigid multi-body dynamics. A validation experiment determined the convergence
conditions and computational model accuracy. The proposed numerical model is
evaluated in terms of flexible variation law and aerodynamic performance. The results
indicate that the flapping frequency, angle of attack, and wind velocity significantly
influence the lift. Furthermore, increasing the frequency will monotonically expand
the maximum and time-averaged lift curve values. When the angle of attack is less
than 30 ◦, the influence on the time-averaged and maximum lift is proportional to the
angle of attack. When the angle of attack is larger than 45 ◦, a stall-like condition
is detected. To broaden the applicability of the present findings, a dimensionless
parameter, reduced frequency, is defined, and its influence on the maximum and time-
averaged lift is investigated. This parametric study shows that as the reduced frequency
increases, the maximum and time-averaged lift increases and then decreases. The
present study could reach a modeling framework that better explains the clapping
wing aerodynamics.


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