An unstructured mesh arbitrary Lagrangian-Eulerian unsteady incompressible flow solver and its application to insect flight aerodynamics

Xiaohui Su, Yuanwei Cao, Yong Zhao

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

In this paper, an unstructured mesh Arbitrary Lagrangian-Eulerian (ALE) incompressible flow solver is developed to investigate the aerodynamics of insect hovering flight. The proposed finite-volume ALE Navier-Stokes solver is based on the artificial compressibility method (ACM) with a high-resolution method of characteristics-based scheme on unstructured grids. The present ALE model is validated and assessed through flow passing over an oscillating cylinder. Good agreements with experimental results and other numerical solutions are obtained, which demonstrates the accuracy and the capability of the present model. The lift generation mechanisms of 2D wing in hovering motion, including wake capture, delayed stall, rapid pitch, as well as clap and fling are then studied and illustrated using the current ALE model. Moreover, the optimized angular amplitude in symmetry model, 45°, is firstly reported in details using averaged lift and the energy power method. Besides, the lift generation of complete cyclic clap and fling motion, which is simulated by few researchers using the ALE method due to large deformation, is studied and clarified for the first time. The present ALE model is found to be a useful tool to investigate lift force generation mechanism for insect wing flight.

Original languageEnglish
Article number061901
JournalPhysics of Fluids
Volume28
Issue number6
DOIs
Publication statusPublished - Jun 1 2016
Externally publishedYes

Fingerprint

insects
incompressible flow
aerodynamics
mesh
flight
hovering
wings
oscillating cylinders
method of characteristics
wakes
compressibility
high resolution
symmetry

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

An unstructured mesh arbitrary Lagrangian-Eulerian unsteady incompressible flow solver and its application to insect flight aerodynamics. / Su, Xiaohui; Cao, Yuanwei; Zhao, Yong.

In: Physics of Fluids, Vol. 28, No. 6, 061901, 01.06.2016.

Research output: Contribution to journalArticle

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