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Article Dans Une Revue Applied Physics Letters Année : 2022

Fluid vortex mapping using the rotational Doppler effect

O. Emile
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Janine Emile

Résumé

The light from a twisted laser beam, scattered at an air/water interface, experiences a rotational Doppler shift. We use a superposition of two beams with different topological charges to measure the beat frequency of the scattered light by a Rankine type vortex at different positions from its center. We show that the angular velocity decreases with the distance in total agreement with a Rankine vortex model. Several extensions are then considered, including the detection of turbulences generated in the wake of airplanes.and nbsp;Published under an exclusive license by AIP Publishing.
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Dates et versions

hal-03687802 , version 1 (30-06-2022)

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O. Emile, Janine Emile. Fluid vortex mapping using the rotational Doppler effect. Applied Physics Letters, 2022, 120 (18), pp.181101. ⟨10.1063/5.0091746⟩. ⟨hal-03687802⟩
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