title: Computational Aerodynamic Analysis of a Micro-CT Based Bio-Realistic Fruit Fly Wing.
abstract: The aerodynamic features of a bio-realistic 3D fruit fly wing in steady state (snapshot) flight conditions were analyzed numerically. The wing geometry was created from high resolution micro-computed tomography (micro-CT) of the fruit fly Drosophila virilis. Computational fluid dynamics (CFD) analyses of the wing were conducted at ultra-low Reynolds numbers ranging from 71 to 200, and at angles of attack ranging from -10° to +30°. It was found that in the 3D bio-realistic model, the corrugations of the wing created localized circulation regions in the flow field, most notably at higher angles of attack near the wing tip. Analyses of a simplified flat wing geometry showed higher lift to drag performance values for any given angle of attack at these Reynolds numbers, though very similar performance is noted at -10°. Results have indicated that the simplified flat wing can successfully be used to approximate high-level properties such as aerodynamic coefficients and overall performance trends as well as large flow-field structures. However, local pressure peaks and near-wing flow features induced by the corrugations are unable to be replicated by the simple wing. We therefore recommend that accurate 3D bio-realistic geometries be used when modelling insect wings where such information is useful.
authors.affiliation: School of Mechanical and Manufacturing Engineering, UNSW Australia, Sydney, New South Wales, Australia.
authors.forename: Joshua
authors.initials: J
authors.lastname: Brandt
authors.affiliation: School of Mechanical and Manufacturing Engineering, UNSW Australia, Sydney, New South Wales, Australia; Aerospace Engineering Department, California Polytechnic State University, San Luis Obispo, California, United States of America.
authors.forename: Graham
authors.initials: G
authors.lastname: Doig
authors.affiliation: School of Mechanical and Manufacturing Engineering, UNSW Australia, Sydney, New South Wales, Australia.
authors.forename: Naomi
authors.initials: N
authors.lastname: Tsafnat
mesh_terms: D000818:Animals; D003198:Computer Simulation; D004330:Drosophila / Q000502:physiology*; D005426:Flight, Animal / Q000502:physiology*; D007091:Image Processing, Computer-Assisted; D009716:Numerical Analysis, Computer-Assisted; D011312:Pressure; D015203:Reproducibility of Results; D014921:Wings, Animal / Q000000981:diagnostic imaging*; D055114:X-Ray Microtomography