The Movement of an Ion-exchange Microparticle in a Weak External Electric Field

The electrokinetic motion of spherical particle suspended in the electrolyte solution under influence of external electric field is studied. Due to impermeability of particle’s surface for one kind of ion species the particle exhibit behavior different to well investigated dielectric particles. Unde...

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Bibliographic Details
Published in:Microgravity science and technology 2018-08, Vol.30 (4), p.411-417
Main Authors: Ganchenko, Georgy, Frants, Elizaveta, Shelistov, Vladimir, Demekhin, Evgeny
Format: Article
Language:English
Subjects:
Aerospace Technology and Astronautics
Asymptotic methods
Asymptotic series
Classical and Continuum Physics
Computer simulation
Dielectric strength
Electric fields
Electric potential
Electrokinetics
Engineering
Ion exchange
Mathematical analysis
Numerical simulations
Original Article
Permeability
Space Exploration and Astronautics
Space Sciences (including Extraterrestrial Physics
Streamlines
Topical Collection on Non-Equilibrium Processes in Continuous Media under Microgravity
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Summary:The electrokinetic motion of spherical particle suspended in the electrolyte solution under influence of external electric field is studied. Due to impermeability of particle’s surface for one kind of ion species the particle exhibit behavior different to well investigated dielectric particles. Under an assumption of a weak external electric field, we derive the analytical estimation of the particle’s velocity by means of a method of matched asymptotic expansions. The analytical analysis is complemented by numerical solution, which gives the distribution of ion’s concentrations, electric potential profiles and flows streamlines. The analytical results are successfully compared with the results of numerical simulation.
ISSN:0938-0108
1875-0494
DOI:10.1007/s12217-018-9627-4