Publication type: Conference other
Type of review: Peer review (abstract)
Title: Analysis of falling droplets into resting liquid and resulting shear stresses
Authors: Hostettler, Marco
Brunner, Daniel
Rosenthal, Florian
Clemens, Mirjam
Koepf, Ellen
Boiger, Gernot Kurt
et. al: No
Proceedings: Multiphysics 2020
Page(s): 50
Conference details: International Conference of Multiphysics, Online, 11-12 December 2020
Issue Date: 10-Dec-2020
Publisher / Ed. Institution: International Society of Multiphysics
ISSN: 2409-1669
Language: English
Subjects: Splashing; OpenFoam; Two-phase-flow; CFD
Subject (DDC): 530: Physics
Abstract: When a vial filled with liquid is transported it is exposed to external vibrations. These vibrations cause motion, which in turn can lead to splashing. This vibration induced splashing causes shear stresses and pressure forces within the fluid. When it comes to pharmaceutical fluids, it is essential to understand these shear- and pressure conditions because they can lead to the degradation of the drug. The presented study focuses on the effects of splashing in a liquid using computational fluid dynamics. Thereby, a falling droplet, which impacts into a surface of a resting liquid, is investigated. The impact and immersion of the droplet into the surface generates a complex agitation of the fluid and leads to the occurrence of shear stresses. These shear stresses depend on parameters such as falling height, droplet diameter and viscosity of the fluid. Using computational fluid dynamics said degrees of freedom were investigated in relation to associated shear conditions. The computational results show that larger droplet diameters as well as larger falling heights tend to primarily increase the strength of the occurring shear stresses. On the other hand increasing fluid viscosity decreases the penetration depth of the influence region while increasing the shear stress level. Therefore, viscosity has a more complex influence on the splashing than the other studied parameters.
Further description: External R&D partner (co-authors Rosenthal, F., Clemens, M., Koepf, E.): F. Hoffmann-La Roche Ltd., Basel, Switzerland
Fulltext version: Published version
License (according to publishing contract): Licence according to publishing contract
Departement: School of Engineering
Organisational Unit: Institute of Computational Physics (ICP)
Appears in collections:Publikationen School of Engineering

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