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Thermocapillary flow without return flow–linear flow

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Abstract

The experimental realization of thermocapillary flow without return flow is reported. This type of flow (linear flow) was proposed and analyzed theoretically by Smith and Davis (J. Fluid Mech., 132:119–144, 1983). We suppressed the return flow by providing channels and side channels with lower flow resistance compared to that of the return flow. Cooling the layer with linear flow from above results in the Marangoni instability of longitudinal rolls as the most dangerous mode. Strong linear flow stabilizes the system against longitudinal rolls. We report preliminary results on the threshold and on the wavelength of the longitudinal rolls.

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Acknowledgements

The experiments were performed at the University of Giessen by N.A. Ospennikov during a DAAD-supported 3-month stay in Germany at the beginning of 2003. We thank ESTEC (Antonio Verga) for the loan of the IR camera. We are grateful to Ichiro Ueno from the Tokio Science University and especially to M.K. Smith from Georgia Institute of Technology in Atlanta for reading the manuscript and improving it by helpful remarks.

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Authors and Affiliations

  1. Department of Theoretical Physics, Perm State University, Perm, Russian Federation

    N. A. Ospennikov

  2. 1. Physics Institute, University of Giessen, H.-Buff-Ring 16, 35392, Giessen, Germany

    D. Schwabe

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  1. N. A. Ospennikov
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  2. D. Schwabe
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Correspondence to D. Schwabe.

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Dedicated to Prof. Dr. Wilfried Kuhn on the occasion of his 80th birthday.

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Ospennikov, N.A., Schwabe, D. Thermocapillary flow without return flow–linear flow. Exp Fluids 36, 938–945 (2004). https://doi.org/10.1007/s00348-003-0777-8

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