Determination of current distribution in energized conductors for the computation of electromagnetic fields

1994 ◽  
Vol 9 (2) ◽  
pp. 1069-1078 ◽  
Author(s):  
A. Selby ◽  
F. Dawalibi
Keyword(s):  
Electromagnetic Fields ◽  
Current Distribution

scholarly journals The current distribution in an electrochemical cell. Part VII. Concluding remarks

2002 ◽  
Vol 67 (4) ◽  
pp. 273-278 ◽  
Author(s):  
Konstantin Popov ◽  
S.M. Pesic ◽  
Predrag Zivkovic
Keyword(s):  
Process Parameters ◽  
Current Distribution ◽  
Current Density ◽  
Electrochemical Cell ◽  
Side Wall ◽  
Cell Geometry ◽  
Electrode Edge ◽  
Side Walls ◽  
In Cells

Anew method for the determination of the ability of an electrolyte to distribute uniformly current density in an electrochemical cell is proposed. It is based on the comparison of the current in cells in which the electrode edges touch the cell side walls with the current in cells with different electrode edge ? cell side wall distances. The effects of cell geometry process parameters and current density are discussed and illustrated using the results presented in the previous papers from this series.

Current and radiated electromagnetic fields due to lightning return strokes when hitting elevated objects

2016 ◽  
Vol 35 (3) ◽  
Author(s):  
Maryam Hajebi ◽  
Mojtaba Khosravi-Farsani ◽  
Seyed Hossein Hesamedin Sadeghi ◽  
Rouzbeh Mazandarani Moini
Keyword(s):  
Electromagnetic Fields ◽  
Current Distribution ◽  
Design Methodology ◽  
Fdtd Method ◽  
Measurement Data ◽  
Vertical Component ◽  
Uniform Mesh ◽  
Large Space ◽  
Lightning Channel ◽  
The Impact

Purpose Tall towers have a high potential for being struck by lightning which is a major source of electromagnetic radiation with adverse effects on electric, electronic and telecommunication instruments. The paper aims to present an accurate method for predicting the radiated electromagnetic fields and current distribution along the lightning channel and the tower hit by the lightning. Design/methodology/approach The electromagnetic model is utilized to model the lightning channel and the tower is represented by lossy conducting wires. The finite difference time domain (FDTD) method is used to solve for the governing Maxwell’s equations. Due to the large computational space, the FDTD code is paralleled between several computer processors. To enhance the efficiency of the code, a non-uniform mesh is used, reducing the mesh length in the air-ground interface. For model evaluation, simulated current distribution along the lightning channel and tower, and the radiated electromagnetic fields are compared with the measurement data and those obtained using the engineering models. Findings The proposed modeling technique has proved to be more accurate than the conventional methods, particularly in the prediction of current distribution along the tall tower and the vertical component of the radiated electric field. Originality/value The main feature of the proposed technique is its ability to consider the impact of metallic structures in a large space around lightning channel on the predicted radiated electromagnetic fields, having no concern on computer memory requirements.

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