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Buoyancy and thermocapillary flow analysis by the combined use of liquid crystals and PIV

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Abstract

Thermocapillary and buoyancy convection is studied experimentally using particle-image-velocimetry with liquid crystal tracers for flow visualization and analysis. This method offers the advantage of measuring the entire flow field (velocity field, temperature distribution etc.) in a selected plane within the fluid simultaneously at a given instant of time in contrast to point by point methods like laser-Doppler-velocimetry (LDV). The paper describes the method and presents quantitative results of both, a thermocapillary and a buoyancy flow experiment. Data of the latter are compared with LDV-results and theoretical predictions, respectively.

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Authors and Affiliations

  1. Technische Universität Bergakademie Freiberg, Institut für Fluidmechanik und Fluidenergiemaschinen, D-09596, Freiberg, Germany

    G. Wozniak

  2. Lehrstuhl für Mechanik, Universität GH Essen, D-45117, Essen, Germany

    K. Wozniak

Authors
  1. G. Wozniak
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  2. K. Wozniak
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Additional information

Presented in part at the 6th International Symposium on Applications of Laser Techniques to Fluid Mechanics, Lisbon, Portugal, July 20–23, 1992 Part of the work was financially supported by the “Ministerium für Wissenschaft und Forschung des Landes NW” which is greatfully acknowledged.

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Wozniak, G., Wozniak, K. Buoyancy and thermocapillary flow analysis by the combined use of liquid crystals and PIV. Experiments in Fluids 17, 141–146 (1994). https://doi.org/10.1007/BF00190910

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  • DOI: https://doi.org/10.1007/BF00190910

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