Influence of Liquid Density and Surface Tension on the Pinning of Sliding Droplets on a Triangular Microstructure
Corresponding Author
Henning Bonart
Technische Universität Berlin, Dynamik und Betrieb technischer Anlagen, Strasse des 17. Juni 135, 10623 Berlin, Germany
Correspondence: Henning Bonart ([email protected]), Technische Universität Berlin, Dynamik und Betrieb technischer Anlagen, Strasse des 17. Juni 135, 10623 Berlin, Germany.Search for more papers by this authorJohannes Jung
Technische Universität Berlin, Dynamik und Betrieb technischer Anlagen, Strasse des 17. Juni 135, 10623 Berlin, Germany
Search for more papers by this authorChristian Kahle
Technische Universität München, Zentrum Mathematik, Boltzmannstrasse 3, 85748 Garching, Germany
Search for more papers by this authorJens-Uwe Repke
Technische Universität Berlin, Dynamik und Betrieb technischer Anlagen, Strasse des 17. Juni 135, 10623 Berlin, Germany
Search for more papers by this authorCorresponding Author
Henning Bonart
Technische Universität Berlin, Dynamik und Betrieb technischer Anlagen, Strasse des 17. Juni 135, 10623 Berlin, Germany
Correspondence: Henning Bonart ([email protected]), Technische Universität Berlin, Dynamik und Betrieb technischer Anlagen, Strasse des 17. Juni 135, 10623 Berlin, Germany.Search for more papers by this authorJohannes Jung
Technische Universität Berlin, Dynamik und Betrieb technischer Anlagen, Strasse des 17. Juni 135, 10623 Berlin, Germany
Search for more papers by this authorChristian Kahle
Technische Universität München, Zentrum Mathematik, Boltzmannstrasse 3, 85748 Garching, Germany
Search for more papers by this authorJens-Uwe Repke
Technische Universität Berlin, Dynamik und Betrieb technischer Anlagen, Strasse des 17. Juni 135, 10623 Berlin, Germany
Search for more papers by this authorAbstract
Sliding droplets are crucial in many industrial applications. Examples are coating and separation processes involving multiple phases and liquid films. Often one can observe how a sliding droplet halts midstream on a solid surface. Wetting defects such as topographic structures can lead to a pinning of sliding droplets. In order to assess the influence of liquid density and surface tension on the pinning, direct numerical simulations are performed. After the model and its discretization are introduced, the solution is validated. Simulation results of gravity-driven droplets on inclined surfaces with structures in the size of the droplets are presented and the observed requirements for pinning a sliding droplet to a surface are discussed.
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