The Twente mass and heat transfer tunnel

ORAL

Abstract

We present a newly-built recirculating vertical water tunnel with global temperature control, bubble injection and local heat/mass injection for the study of local heat and mass transfer in turbulent (bubbly) flows. The tunnel is made of high-grade stainless steel permitting the use of salt solutions in excess of 15% mass fraction, besides clear water. The tunnel volume is 300 liters. Three interchangeable measurement sections of 1 m in height but of different aspect ratios (0.3 x 0.04 m2, 0.3 x 0.06 m2, 0.3 x 0.08 m2) span a Reynolds-number range from 5 x 103 to 1.6 x 105 in the case of clear water at room temperature.

The glass vertical measurement sections allow for optical access to the flow, enabling techniques such as laser Doppler anemometry, particle image velocimetry, particle tracking velocimetry and laser-induced fluorescent imaging. Thermistors mounted on a built-in traverse provide local temperature information at a few milli-Kelvin accuracy. Combined with simultaneous local velocity measurements the local heat flux can be studied.

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Presenters

  • Dennis P.M. Van Gils

    Physics of Fluids and Max Planck Center for Complex Fluids Dynamics, University of Twente, Enschede, The Netherlands, Univ of Twente

Authors

  • Dennis P.M. Van Gils

    Physics of Fluids and Max Planck Center for Complex Fluids Dynamics, University of Twente, Enschede, The Netherlands, Univ of Twente

  • Gert-Wim Bruggert

    Physics of Fluids and Max Planck Center for Complex Fluids Dynamics, University of Twente, Enschede, The Netherlands

  • Biljana Gvozdić

    Physics of Fluids and Max Planck Center for Complex Fluids Dynamics, University of Twente, Enschede, The Netherlands, Univ of Twente

  • On-Yu Dung

    Physics of Fluids and Max Planck Center for Complex Fluids Dynamics, University of Twente, Enschede, The Netherlands, Univ of Twente

  • Sander G. Huisman

    Physics of Fluids and Max Planck Center for Complex Fluids Dynamics, University of Twente, Enschede, The Netherlands, Univ of Twente, University of Twente

  • Chao Sun

    Physics of Fluids and Max Planck Center for Complex Fluids Dynamics, University of Twente, Enschede, The Netherlands, Center for Combustion Energy and Department of Thermal E, Tsinghua Univ, Tsinghua Univ, Univ of Twente, Tsinghua University

  • Detlef Lohse

    University of Twente, Physics of Fluids and Max Planck Center for Complex Fluids Dynamics, University of Twente, Enschede, The Netherlands, Univ of Twente, Univ of Twente, Max Plank Institute for Dynamics and Self-Organization, Twente Tech Univ, University of Twente, Max Planck Center for complex fluid dynamics