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    Determination of Non-Equilibrium Surface Tension Gradients in Marangoni Thermal Flows: Application to Aqueous Solutions of Fatty Alcohols

    G.Pétré1, K.Tshinyama, A. Azouni2, S. Van Vaerenbergh1

    FDMP-Fluid Dynamics & Materials Processing, Vol.4, No.1, pp. 1-10, 2008, DOI:10.3970/fdmp.2008.004.001

    Abstract This study illustrates a relevant and practical method to determine the effective surface tension gradient in a layer subjected to a lateral temperature difference. In general, this can be hardly performed in situ without perturbing the flow. For this reason we rely on an indirect determination approach. A simple model is developed that relates the surface tension gradient to other quantities that can be measured without introducing significant disturbances in the system. Measurements of these quantities are performed in a set-up where the flow corresponds with a good approximation to a one-dimensional model. A previously used More >

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