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Experimental study of double-cavity flow

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Abstract

The flow through two facing, identical cavities (double-cavity) is characterized experimentally, as the inflow velocity and the distance between the cavities is varied. Standard 2D2C particle image velocimetry measurements in the spanwise mid-plane provide information on the instantaneous and mean velocity flow fields. Laser Doppler velocimetry measurements at several points in the double-cavity domain reveal the global character of the streamwise fluctuating velocity spectra. The flow is characterized based on time series, recorded in the shear layer of one of the cavities, for a wide range of inflow velocities and intercavity distances. In a detailed spectral study, we show how the shear layer spectra get affected when the two cavities are brought closer together. Based on the experimental data, a temporal local linear stability analysis was carried out, which was able to explain why the frequency peaks for close intercavity distances broaden and move to higher Strouhal numbers.

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Acknowledgements

We wish to acknowledge the support by the CONICET (Argentina) under Grant \(\#\)3303, UBACYT under grant \(\#\)100228, Science-Accueil d’Université Paris-Sud, LIA-PMF/FMF, and the 13STIC-08-P-MVP project of the SticAmSud program. Furthermore, Florian Tuerke greatly acknowledges the support of CONICET (Argentina), Université Paris-Sud & Université Saclay (France), Erich-Becker-Studienstiftung, and the DAAD (Germany).

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Authors and Affiliations

  1. Departamento de Ingeniería Mecánica, Universidad de Buenos Aires, CABA, Buenos Aires, Argentina

    F. Tuerke & G. Artana

  2. CONICET-Consejo Nacional de Investigaciones Científicas y Técnicas, CABA, Argentina

    F. Tuerke & G. Artana

  3. LIMSI-CNRS, BP 133, 91403, Orsay Cedex, France

    L. R. Pastur, D. Sciamarella & F. Lusseyran

  4. Université Paris Sud XI (Paris-Saclay), Orsay Cedex, France

    F. Tuerke, L. R. Pastur & F. Lusseyran

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  1. F. Tuerke
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  2. L. R. Pastur
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  3. D. Sciamarella
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  4. F. Lusseyran
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  5. G. Artana
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Correspondence to F. Tuerke.

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Tuerke, F., Pastur, L.R., Sciamarella, D. et al. Experimental study of double-cavity flow. Exp Fluids 58, 76 (2017). https://doi.org/10.1007/s00348-017-2360-8

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