Publication type: Conference paper
Type of review: Peer review (abstract)
Title: Evaluation of Faraday instabilities in small vessels
Authors: Zubiaga, Asier
Brunner, Daniel
Sager, Fabian
Clemens, Mirjam
Koepf, Ellen
Boiger, Gernot Kurt
et. al: No
Conference details: 7th ESI Open FOAM Conference, Berlin, Germany, 15 - 17 October 2019
Issue Date: 2019
Publisher / Ed. Institution: ESI Group
Language: English
Subjects: Modelling; Fluid; Faraday instabilities; Vibration
Subject (DDC): 530: Physics
Abstract: Different sort of problems arise from sloshing liquids in containers. Well studied examples include the damage that earthquakes can have on dams, water reservoirs and oil tanks, or the displacement of fuel inside the tanks of jet planes and space rockets [1]. Mechanical stress in agitating biological or pharmaceutical liquid solutions can result in denaturation and aggregation, thereby affecting the stability of the products profoundly. In fact, biomolecules have a high propensity to undergo physical instability reactions that are encountered by changes in the three dimensional structure of the active ingredient [2]. One important aspect to understand the agitation of aqueous solutions is the stability threshold above which the free surface shows normal modes. Under vertical vibration of the vessel, these modes are stationary and can grow large in intensity. Therefore, they can induce a high shear stress on the solved molecules. OpenFOAM allows a detailed study of the agitation of a liquid inside a vessel. The two-phase system can be studied with a transient solver in an accelerated frame. The agitation profile can be set to sinusoidal to study in detail the stability threshold or multi-harmonic for testing realistic agitation profile. By monitoring the wave height and the mode composition, the induced instabilities can be characterized. In this work, OpenFOAM simulations of a liquid in contact with air will be performed to study the Faraday instability threshold. The simulations will be compared to a semi-analytical theory [3] and to experiments done on a vertical vibration table. The main consequences for the stability of the liquid confined in the vessel will be discussed.
URI: https://digitalcollection.zhaw.ch/handle/11475/19068
Fulltext version: Published version
License (according to publishing contract): Not specified
Departement: School of Engineering
Organisational Unit: Institute of Computational Physics (ICP)
Appears in Collections:Publikationen School of Engineering

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