2017/06/30 by Oleg Zikanov
Chemical Engineering · Chemistry · Engineering · Physics and Astronomy · #Aluminium #Chemistry #Composite material #Electrode #Electrolyte #Instability #Layer (electronics) #Liquid metal #Materials science #Mechanics #Membrane-based Ion Separation Techniques #Metal #Metallurgy #Molten salt chemistry and electrochemical processes #Nonlinear system #Physics #Thermodynamic and Structural Properties of Metals and Alloys #physics.flu-dyn
paper · pdf · doi:10.1007/s00162-018-0456-2
published as Theoretical and Computational Fluid Dynamics, vol. 32, N3, 325-347 (2018)
arxiv created 2017/12/27 · openalex publication_date 2018/03/31 · arxiv updated 2018/04/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Magnetohydrodynamically induced interface instability in liquid metal batteries is analyzed. The batteries are represented by a simplified system in the form of a rectangular cell, in which strong vertical electric current flows through three horizontal layers: the layer of a heavy metal at the bottom, the layer of a light metal at the top, and the layer of electrolyte in the middle. A new two-dimensional nonlinear model based on the conservative shallow water approximation is derived and utilized in a numerical study. It is found that in the case of small density difference between the electrolyte and one of the metals, the instability closely resembles the rolling pad instability observed earlier in the aluminum reduction cells. When the two electrolyte-metal density differences are comparable, the dynamics of unstable systems is more complex and characterized by interaction between two nearly symmetric or antisymmetric interfacial waves.