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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| Published in | Theoretical and applied mechanics letters Vol. 5; no. 1; pp. 5 - 8 |
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| Main Authors | , , , |
| Format | Journal Article |
| Language | English |
| Published |
Elsevier Ltd
01.01.2015
Elsevier |
| Subjects | |
| Online Access | Get full text |
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| Abstract | 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. |
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| AbstractList | 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. |
| Author | He, Guowei Liu, Tianshu Zhang, Xing Wang, Shizhao |
| Author_xml | – sequence: 1 givenname: Shizhao surname: Wang fullname: Wang, Shizhao organization: The State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China – sequence: 2 givenname: Xing surname: Zhang fullname: Zhang, Xing organization: The State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China – sequence: 3 givenname: Guowei surname: He fullname: He, Guowei email: hgw@lnm.imech.ac.cn organization: The State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China – sequence: 4 givenname: Tianshu surname: Liu fullname: Liu, Tianshu organization: The State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China |
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| Cites_doi | 10.1126/science.1153019 10.1017/S0952836901001005 10.1007/s003600050191 10.1063/1.4864297 10.1242/jeb.029777 10.2514/1.29263 10.1063/1.4821520 10.1007/s00348-009-0624-7 10.1088/1748-3182/4/1/015001 10.1088/1748-3182/1/4/S02 10.1242/jeb.204.16.2873 10.1126/science.1142281 10.1017/S0022112095000462 10.1242/jeb.201.2.237 10.1016/j.jcp.2011.01.045 10.1016/j.compfluid.2013.09.001 |
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| Keywords | Numerical simulation Vortex lift Bat Flapping flight Leading-edge vortex Lift |
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| SubjectTerms | Bat Flapping flight Leading-edge vortex Lift Numerical simulation Vortex lift |
| Title | Numerical simulation of unsteady flows over a slow-flying bat |
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