Numerical simulation of unsteady flows over a slow-flying bat

This letter describes numerical simulation of the unsteady flow over a slow-flying bat by using the immersed boundary method based on the measured bat wing geometry and kinematics. The main vortical structures around the bat flapping wings are identified, illuminating the lift-generating role of the...

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Bibliographic Details
Published inTheoretical and applied mechanics letters Vol. 5; no. 1; pp. 5 - 8
Main Authors Wang, Shizhao, Zhang, Xing, He, Guowei, Liu, Tianshu
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.01.2015
Elsevier
Subjects
Bat
Flapping flight
Leading-edge vortex
Lift
Numerical simulation
Vortex lift
Numerical simulation
Vortex lift
Bat
Flapping flight
Leading-edge vortex
Lift
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Summary:This letter describes numerical simulation of the unsteady flow over a slow-flying bat by using the immersed boundary method based on the measured bat wing geometry and kinematics. The main vortical structures around the bat flapping wings are identified, illuminating the lift-generating role of the leading-edge vortices generated mainly in the downstroke. Furthermore, the lift decomposition indicates that the vortex lift has the dominant contribution to the time-averaged lift and the lift associated with the fluid acceleration has the relatively moderate effect.
ISSN:2095-0349
DOI:10.1016/j.taml.2015.01.006