Numerical approach and experimental verification for interface shape determination between layered fluids subject to a magnetic field

Various applications of magnetic fluids involve interface phenomena. The analysis of the hydrostatic interface shape between two immiscible liquid layers, especially under magnetic field influence, is the first step to understand the accompanying complex dynamic phenomena as well as to providing rel...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2012-11, Vol.324 (22), p.3633-3640
Main Authors: Ludovisi, Daniele, Cha, Soyoung S., Worek, William M., Ramachandran, Raranaynan
Format: Article
Language:English
Subjects:
Bond number
Computational fluid dynamics
Cross-disciplinary physics: materials science
rheology
Dynamics
Exact sciences and technology
Ferrofluid
Fluid flow
Fluids
Heterogeneous liquids: suspensions, dispersions, emulsions, pastes, slurries, foams, block copolymers, etc
Horizontal
Hydrostatics
Interfacial phenomena
Layered fluid systems
Liquids
Magnetic fields
Magnetic fluid
Magnetic stress
Material form
Mathematical models
Meniscus
Physics
Rheology
Surface tension
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Summary:Various applications of magnetic fluids involve interface phenomena. The analysis of the hydrostatic interface shape between two immiscible liquid layers, especially under magnetic field influence, is the first step to understand the accompanying complex dynamic phenomena as well as to providing reliable numerical capabilities for their accurate prediction. This study presents a relatively simple numerical approach, and the accompanying theory, to reliably define the meniscus shape in a two-layered fluid system in presence of a horizontal magnetic field with a vertical gradient. In the course of the study, two dimensionless parameters have been derived to describe the magnetic pressure jump at the interface and the magnetic body force throughout the volume. These parameters are used to interpret the results of the analysis and to show that a horizontal magnetic field tends to flatten the meniscus shape at the interface despite of the direction of its vertical gradient.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2012.04.007