2004/09/03 by Francisco Vega Reyes, Reyes, Francisco Vega
Engineering · Physics and Astronomy · #Characterization and Applications of Magnetic Nanoparticles #Electrohydrodynamics and Fluid Dynamics #FOS: Physical sciences #Fluid Dynamics (physics.flu-dyn) #Fluid Dynamics and Thin Films #physics.flu-dyn
paper · pdf · doi:10.48550/arxiv.physics/0409031
Submitted to Phys. Fluids. 16 pages, 6 figures
openalex publication_date 2004/09/03 · arxiv created 2005/09/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The stability of a non-ohmic/ohmic fluid interface in the presence of a constant gravitational field and stressed by a vertical stationary electric field with unipolar injection is studied, focusing on the destabilizing action of the electric pressure when charge relaxation effects can be ignored. We use a hydraulic model, whose static equilibrium condition is written and analysed as a function of the ohmic fluid conductivity when subjected to a non-linear perturbation. The combined action of the polarization and free interfacial charges on the pressure instability mechanism is also analysed. The results show some important peculiarities of the fluid interface behaviour in the presence of a stationary space charge distribution generated by unipolar injection in the non-ohmic fluid.