Drop train flow in a microtube
UMR1114 EMMAH INRAE - Avignon Université, 301 rue Baruch de Spinoza, 84911, Avignon, France
Accepted: 30 January 2023
Published online: 10 February 2023
This study investigates the flow of a thin annular film driven by an axial force in a microtube. Partial wetting is taken into account using the diffuse interface theory and the film dynamics is approximated by a long-wave mesoscopic model. Using time integration and path-following method, we study the different traveling waves. A rich behavior is brought to light and notably the existence of drop train with a complex spatial organization. We determine the genesis of the drop train related to the coarsening phenomenon. Increasing the domain size, the complexity of these pattern increases by breaking the translation symmetry. Thus, for low mean water content, flow in a microtube occurs via drop train patterns.
© The Author(s), under exclusive licence to EDP Sciences, Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.