Effect of gas evolution on current distribution and ohmic resistance in a vertical cell under forced convection conditions

1986 ◽  
Vol 16 (4) ◽  
pp. 615-625 ◽  
Author(s):  
Yoshinori Nishiki ◽  
Koichi Aoki ◽  
Koichi Tokuda ◽  
Hiroaki matsuda
Keyword(s):  
Forced Convection ◽  
Current Distribution ◽  
Gas Evolution ◽  
Ohmic Resistance ◽  
Vertical Cell

Numerical Modeling of Galvanic Corrosion Behaviors on Uranium Surface

2013 ◽  
Vol 702 ◽  
pp. 140-144
Author(s):  
Ping An Shi ◽  
Hong Liang Zhou
Keyword(s):  
Numerical Simulation ◽  
Current Distribution ◽  
Galvanic Corrosion ◽  
Corrosion Current ◽  
Electrode Kinetics ◽  
Uniform Corrosion ◽  
Corrosion Rates ◽  
Ohmic Resistance ◽  
Circular Defect ◽  
Corrosion Behaviors

The Uranium and Titanium corrosion rates are described by a Tafel’s relationship, and the cathodic protection of Uranium is a function of a Wagner number. A numerical simulation of galvanic corrosion of Uranium surface under thin layer electrolyte is presented. The model considered that the effect of a circular defect and oxygen reduction and corrosion in the Uranium surface, the effect of electrolyte thickness and conductivity and defect radius on corrosion current distribution of Uranium with is investigated. The results shows that the corrosion rate at the center is non-uniform, and it could lead to the formation of a hemispherical-shaped pit. And the effect of radius is to increase the importance of the electrode kinetics relative to ohmic resistance, and to increase the potential difference between the center and edge of the Uranium surface, resulting in non-uniform corrosion current distribution.

THE THEORY OF CURRENT DISTRIBUTION AND POTENTIAL PROFILE AT AN ELECTRODE OF SIGNIFICANT OHMIC RESISTANCE

1963 ◽  
Vol 41 (10) ◽  
pp. 2447-2454 ◽  
Author(s):  
B. E. Conway ◽  
E. Gileadi ◽  
H. G. Oswin
Keyword(s):  
Current Distribution ◽  
Potential Drop ◽  
Practical Significance ◽  
High Current ◽  
Fuel Cell Electrodes ◽  
Metal Solution ◽  
Ohmic Resistance ◽  
Order Of Magnitude ◽  
Ohmic Potential Drop ◽  
Linear Geometry

The problem of current distribution at an electrode of linear geometry having a significant ohmic resistance is examined for conditions where the ohmic potential drop along the electrode material is of the same order of magnitude as the metal–solution potential difference. This problem is of practical significance in primary and secondary cells at high current drains and in certain types of fuel cell electrodes. The current distribution and metal–solution potential profiles are calculated as limiting cases of a general theory. The true and apparent current–potential relations are compared theoretically.

Current distribution of Nilgiri grass yellow Eurema nilgiriensis Yata (Lepidoptera: Pieridae), with an updated taxonomic key to Eurema of Western Ghats, India

ENTOMON ◽  
2019 ◽  
Vol 44 (1) ◽  
pp. 23-32 ◽  
Author(s):  
P. C. Sujitha ◽  
G. Prasad ◽  
R. Nitin ◽  
Dipendra Nath Basu ◽  
Krushnamegh Kunte ◽  
...  
Keyword(s):  
Current Distribution ◽  
Western Ghats ◽  
Original Description ◽  
High Elevation ◽  
Type Locality ◽  
Ecological Data ◽  
Field Identification ◽  
Wing Patterns ◽  
Southern Western Ghats ◽  
The Nilgiris

Eurema nilgiriensis Yata, 1990, the Nilgiri grass yellow, was described from Nilgiris in southern India. There are not many published records of this species since its original description, and it was presumed to be a high-elevation endemic species restricted to its type locality. Based on the external morphology (wing patterns) as well as the male genitalia, the first confirmed records of the species from Agasthyamalais and Kodagu in the southern Western Ghats, is provided here. This report is a significant range extension for the species outside the Nilgiris, its type locality. Ecological data pertaining to this species as well as the field identification key to all known Eurema of Western Ghats are also presented.

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