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Time-resolved measurement of concentration fluctuations in a confined bubbly flow by LIF

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Academic year: 2021

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Fig. 1. Experimental set-up and instrumentation. The lighted volume is denoted by the small cylinder (in green), the observation volume by large cylinder (in orange), the field of view of the camera by the parallelepiped (in red)
Fig. 4. Comparison of the signals measured by the spectrometer (black) and by imaging (gray)
Fig. 5. Impact of the presence of bubbles in the vicinity of the measurement volume on the measurement
Fig. 9. Illustration of the two timescales present in the concentration signal. Sig- nal of concentration (black)
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