Abstract
This study has been performed in the frame of preparing the space experiment JEREMI (Japanese and European Research Experiment on Marangoni Instabilities). The use of forced coaxial gas flow is proposed as a way to stabilize the Marangoni convection in liquid bridges, which might have important technological applications in the floating zone technique. A new set-up is under development and all sub-systems have passed severe tests. Here we present the design of this set-up and preliminary results of experiments for shear-driven two-phase flows in a confined volume of liquid under conditions of normal gravity. The geometry corresponds to a cylindrical liquid bridge concentrically surrounded by an annular gas channel with external solid walls. Gas enters into the annular duct, flows between solid walls and upon reaching the liquid zone entrains initially quiescent liquid. The test liquids are ethanol, n-decane and 5 cSt silicone oil, which have different degrees of viscosity and of volatility. The gas flow along the interface strongly enhances the evaporation and, correspondingly, affects the interface shape. Silhouette measurements are used for optical determination of the interface shape. From the digital images the variation of the liquid volume as a function of flow rate is calculated.
Similar content being viewed by others
References
Ferrera, C., Mialdun, A., Shevtsova, V., Cabezas, M.G., Montanero, J.M.: Measurement of the dynamical free surface deformation in liquid bridges. Acta Astronaut. 62, 471 (2008a)
Ferrera, C., Montanero, J.M., Mialdun, A., Shevtsova V., Cabezas, M.G.: A new experimental technique for measuring the dynamical free surface deformation in liquid bridges due to thermal convection. Meas. Sci. Technol. 19, 015410 (2008b)
Gaponenko, Yu., Ryzhkov, I., Shevtsova, V.: On flows driven by mechanical stresses in a two-phase system. FDMP 6, 75 (2010)
Gaponenko, Yu., Glockner, S., Mialdun, A., Shevtsova, V.: Study of a liquid bridge subjected to interface shear stress. Acta Astronaut. 69, 119 (2011a)
Gaponenko, Yu., Mialdun, A., Shevtsova, V.: Liquid entrainment by gas flow along the interface. Eur. Phys. J. Special Topics 192, 63 (2011b)
Gaponenko, Yu., Mialdun, A., Shevtsova V.: Shear driven two-phase flows in vertical cylindrical duct. Int. J. Multiph. Flow 39, 205 (2012)
Mialdun, A., Yasnou, V., Shevtsova, V.: An experimental study of the dynamics of liquid interface with shear-induced flow. In: Proc. Int. Conf. on Multiscale Complex Fluid Flows and Interfacial Phenomena, MULTIFLOW-2010. Brussels, Belgium (2010)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Yasnou, V., Mialdun, A. & Shevtsova, V. Preparation of JEREMI Experiment: Development of the Ground Based Prototype. Microgravity Sci. Technol. 24, 411–418 (2012). https://doi.org/10.1007/s12217-012-9314-9
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12217-012-9314-9