scholarly journals The influence of electric current application configuration on the electro-vortex flow structure of conductive medium in cylindrical cell

2020 ◽  
Vol 950 ◽  
pp. 012031
Author(s):  
S Mandrykin ◽  
I Kolesnichenko
Keyword(s):  
Electric Current ◽  
Flow Structure ◽  
Vortex Flow ◽  
Current Application ◽  
Cylindrical Cell ◽  
Conductive Medium

The influence of a cylindrical cathode on the electro-vortex flow of liquid metal: Numerical simulations and laboratory experiments

2021 ◽  
Author(s):  
Vladislav Eltishchev ◽  
Sergei Mandrykin ◽  
Ilya Kolesnichenko
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Liquid Metal ◽  
Electric Current ◽  
Laboratory Experiments ◽  
Vortex Flow ◽  
Qualitative Change ◽  
Critical Magnetic Field ◽  
Current Application ◽  
Cylindrical Cell

Abstract The electro-vortex flow of liquid metal in a cylindrical cell, placed into external vertical magnetic field, in case of axial electric current application is studied numerically and experimentally. The results are compared to those previously obtained in case of a localized electric current application. In the absence of the external magnetic field, the comparison shows no qualitative change in the flow structure. In presence of the external magnetic field, a poloidal motion is suppressed. A critical magnetic field of poloidal suppression is shown to be approximately 50% higher in case of axial electric current application.

Effect of the Earth’s Magnetic Field on the Electric-Vortex-Flow Structure

2018 ◽  
Vol 63 (11) ◽  
pp. 447-450 ◽  
Author(s):  
D. A. Vinogradov ◽  
Yu. P. Ivochkin ◽  
I. O. Teplyakov
Keyword(s):  
Magnetic Field ◽  
Flow Structure ◽  
Vortex Flow ◽  
Earth’S Magnetic Field ◽  
Earth's Magnetic Field

scholarly journals PABA Release from Chitosan-PCL with Induced Electric Current

2018 ◽  
Author(s):  
Jennifer M. Miller ◽  
Roche C. de Guzman
Keyword(s):  
Electric Current ◽  
Drug Delivery Systems ◽  
Release Kinetics ◽  
Controlled Drug Delivery ◽  
Aminobenzoic Acid ◽  
External Current ◽  
Current Application ◽  
Biomaterial Scaffolds ◽  
Crosslinked Chitosan ◽  
Poly Caprolactone

AbstractControlled drug delivery systems such as the stimulation-based biomaterial scaffolds for sequestration and release of drugs offer safety and regulated therapeutic approach. In this study, the drug:para-aminobenzoic acid (PABA) was absorbed into a crosslinked chitosan and poly(caprolactone) (PCL) hydrogel and its release kinetics quantified under different conditions. It was experimentally-observed that the higher the pH (or the more basic the pH), the slower the PABA saturation release trended over time. At the acidic environment of pH 4, PABA was released the fastest, and enhanced by the degradation of chitosan-PCL gel. When a constant electric current of 0.6 mA sa applied, PABA release was induced at pH 10. However, at pH 7, PABA was stably-bound to the chitosan-PCL matrix, with or without the external current. The selective sequestration of PABA at basic pH and its stimulated release via electric current application can be further explored for clinical translatability.

1209 Vortex flow structure on a butterfly wing(1)

2006 ◽  
Vol 2006 (0) ◽  
pp. _1209-a_
Author(s):  
Masaki Fuchiwaki ◽  
Kazuhiro Tanaka
Keyword(s):  
Flow Structure ◽  
Vortex Flow ◽  
Butterfly Wing

Effects of electrical stimulation and seminal plasma on the motility of mouse sperm

2002 ◽  
Vol 14 (8) ◽  
pp. 471 ◽  
Author(s):  
R. T. Tecirlioglu ◽  
O. Lacham-Kaplan ◽  
A. O. Trounson
Keyword(s):  
Electric Current ◽  
Seminal Plasma ◽  
Epididymal Sperm ◽  
Current Application ◽  
Rest Periods ◽  
Epididymal Spermatozoa ◽  
Fertilization Capacity ◽  
Motility Parameters

The effects of electric current (in vivo and in vitro) and seminal plasma on epididymal and ejaculated sperm obtained from C57BL × CBA and C57BL/6J mice were investigated by studying motility parameters, fertilization and embryo development. Electroejaculates were obtained by applying a series of computer-generated sinusoidal alternating currents (0.25–3.0 V at 50 Hz) delivered for 1, 2 and 3 s with 1-s rest periods using a four-electrode rectal probe for 4 min. Epididymal sperm obtained from the same mice were either subjected to electric current in vitro in a Plexiglass chamber or incubated in a medium containing seminal plasma for 2 h. In vitro electric current application and incubation in a medium containing seminal plasma significantly (P<0.01) decreased sperm motility. Neither electroejaculates nor epididymal spermatozoa incubated with seminal plasma could fertilize oocytes by conventional IVF (P<0.001), whereas sperm subjected to in vitro electric current had lost little of their ability to fertilize oocytes. Following transfer of embryos generated by intracytoplasmic sperm injection (ICSI), the number of live pups obtained from electroejaculated sperm (10.2%; 6/59) was significantly (P<0.01) lower than from epididymal sperm (50.0%; 22/42). Electroejaculation using a rectal probe had little effect on motility and fertilization capacity of mouse epididymal sperm, whereas the presence of seminal plasma decreased motility and prevented fertilization.

scholarly journals The Phenomenon of Electroohmic Transformation

2020 ◽  
Vol 21 (4) ◽  
pp. 743-748
Author(s):  
M.Y. Derevianchuk ◽  
A.A. Аshcheulov ◽  
D.A. Lavreniuk
Keyword(s):  
Electrical Conductivity ◽  
Electric Current ◽  
Measurement Technology ◽  
Transformation Coefficient ◽  
Plate Material ◽  
Electrically Conductive ◽  
Conductive Medium ◽  
Side Face ◽  
Geometrical Factors ◽  
Crystallographic Axes

Peculiarities of electric current distribution in an anisotropic electrically conductive medium are considered and dependences of its longitudinal and transverse components on geometrical factors are established. In the case of a rectangular plate of length a, height b, and width c, the selected crystallographic axes are located in the plane of the side face (a × b), and one of these axes is oriented at an angle α to the edge α. Application to the upper and lower end faces of the plate of some potential difference leads to the appearance of longitudinal and transverse components of the flowing electric current.  This leads to the possibility of transforming the electric current magnitude. The methods of optimizing the transformation coefficient magnitude which is determined by both the magnitude of the anisotropy of the electrical conductivity of the plate material and the coefficient of its shape k = a/b. The design variants of anisotropic electrically conductive transformers are proposed. The use of this transformation effect makes it possible to expand the practical use of electroohmic phenomena. This principle of transformation will expand the areas of its use in metrology and measurement technology.

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