An optical measurement of vortex shape at a free surface |
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Authors: | Qi-Can Zhang Xian-Yu Su |
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Institution: | Opto-Electronics Department, Sichuan University, Chengdu 610064, China |
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Abstract: | We have proposed an optical method of vortex shape measurement based on Fourier transform profilometry (FTP) and verified it by experiment. The results of our experiment proposed in this paper show that FTP can efficiently reconstruct the vortex shape at a free surface and this method is suitable for wide use in studying such problems as liquid shear flow, wake of an object, flow behind a bluff body, and wetting angle. |
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Keywords: | Fourier transform profilometry Vortex shape measurement Dynamic liquid surface |
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