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- Title
Experimental investigation of flow field around the elastic flag flapping in periodic state.
- Authors
Jia, Yongxia; Jia, Lichao; Su, Zhuang; Yuan, Huijing
- Abstract
The flapping of a flag in the wind is a classical fluid-structure problem that concerns the interaction of elastic bodies with ambient fluid. We focus on the desirable experimental results of the flow around the flapping flag. By immersing the elastic yet self-supporting heavy flag into water flow, we use particle image velocimetry (PIV) techniques to obtain the whole flow field around the midspan of the flag interacting with a fluid in periodic state. A unique PIV image processing method is used to measure near-wall flow velocities around a moving elastic flag. There exists a thin flow circulation region on the suction side of the flag in periodic state. This observation suggests that viscous flow models may be needed to improve the theoretical predictions of the flapping flag in periodic state, especially in a large amplitude.
- Subjects
PARTICLE image velocimetry; THREE-dimensional printing; FLUID flow; X-ray diffraction; COMPOSITE materials
- Publication
Modern Physics Letters B, 2018, Vol 32, Issue 12/13, p-1
- ISSN
0217-9849
- Publication type
Article
- DOI
10.1142/S0217984918400316