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Time–space characteristics of stratified shear layer from UVP measurements

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Abstract

The stratified shear layer flow pattern involves a fresh water layer flowing over a salted water one. The instabilities arising due to velocity gradients are mainly convective and thus evolve in time and space during their downstream propagation. This work was carried out within the framework of a study on the interaction between fresh water and seawater in the estuaries of rivers, where the main part of the physicochemical and biological phenomena occurs under the control of hydrodynamic conditions. The spatio-temporal velocity profile measurement by the ultrasonic Doppler method is well adapted to the stability analysis of such flows. It allows a comparison between the experimental wave properties and the theoretical results given by a linear temporal approach extended to the spatial point of view.

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Acknowledgements

Financial support was received from the European program MAS3-CT96-0049.

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Authors and Affiliations

  1. Laboratoire d'Informatique pour la Mécanique et les Sciences de l'Ingénieur, LIMSI-CNRS (UPR3251), BP 133, 91403 Orsay CEDEX, Orsay, France

    F. Lusseyran

  2. Laboratoire d'Aérothermique, CNRS UPR 9020, 1C avenue de la Recherche Scientifique, 45067 Orléans Cedex 2, Orléans , France

    B. Izrar

  3. Laboratoire de Mécanique Théorique et Appliquée, CNRS UMR 7563, 2 avenue de la Forêt de Haye, 54516 , Vandoeuvre lès Nancy, France

    C. Audemar & S. Skali-lami

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  1. F. Lusseyran
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  2. B. Izrar
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  3. C. Audemar
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  4. S. Skali-lami
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Correspondence to F. Lusseyran.

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Lusseyran, F., Izrar, B., Audemar, C. et al. Time–space characteristics of stratified shear layer from UVP measurements. Exp Fluids 35, 32–40 (2003). https://doi.org/10.1007/s00348-003-0614-0

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  • DOI: https://doi.org/10.1007/s00348-003-0614-0

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