BOUNDARY CONDITIONS FOR MATHEMATICAL SIMULATION OF THE ELECTROMAGNETIC FIELD INSIDE AND OUTSIDE OF THE DISCHARGE CHAMBER OF HIGH-VOLTAGE ELECTRO-HYDRAULIC INSTALLATION

2016 ◽  
Vol 2016 (3) ◽  
pp. 25-32
Author(s):  
V.M. Kosenkov ◽  
◽  
V.M. Bychkov ◽  
Keyword(s):  
Electromagnetic Field ◽  
Boundary Conditions ◽  
Mathematical Simulation ◽  
High Voltage ◽  
Discharge Chamber

Simulations of electric field at the initiation altitudes of sprites and halos generated by the thundercloud charge structure and lightning channels of causative return strokes

2021 ◽  
Author(s):  
Petr Kaspar ◽  
Ivana Kolmasova ◽  
Ondrej Santolik ◽  
Martin Popek ◽  
Pavel Spurny ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Electric Field ◽  
Boundary Conditions ◽  
Free Space ◽  
Nonlinear Effects ◽  
Charge Structure ◽  
Transient Luminous Events ◽  
Lightning Channel ◽  
Free Parameters

<p><span>Sprites and halos are transient luminous events occurring above thunderclouds. They can be observed simultaneously or they can also appear individually. Circumstances leading to initiation of these events are still not completely understood. In order to clarify the role of lightning channels of causative lightning return strokes and the corresponding thundercloud charge structure, we have developed a new model of electric field amplitudes at halo/sprite altitudes. It consists of electrostatic and inductive components of the electromagnetic field generated by the lightning channel in free space at a height of 15 km. Above this altitude we solve Maxwell’s equations self-consistently including the nonlinear effects of heating and ionization/attachment of the electrons. At the same time, we investigate the role of a development of the thundercloud charge structure and related induced charges above the thundercloud. We show how these charges lead to the different distributions of the electric field at the initiation heights of the halos and sprites. We adjust free parameters of the model using observations of halos and sprites at the Nydek TLE observatory and using measurements of luminosity curves of the corresponding return strokes measured by an array of fast photometers. The latter measurements are also used to set the boundary conditions of the model.</span></p>

scholarly journals Memory Efficient Method for Electromagnetic Multi-Region Models Using Scattering Matrices

2018 ◽  
Vol 23 (4) ◽  
pp. 71 ◽  
Author(s):  
C. Custers ◽  
J. Jansen ◽  
E. Lomonova
Keyword(s):  
Electromagnetic Field ◽  
Boundary Conditions ◽  
Efficient Method ◽  
Maximum Size ◽  
Scattering Matrix ◽  
Matrix Approach ◽  
Matrix Formulation ◽  
Scattering Matrices ◽  
Memory Efficient

This paper describes the scattering matrix approach to obtain the solution to electromagnetic field quantities in harmonic multi-layer models. Using this approach, the boundary conditions are solved in such way that the maximum size of any matrix used during the computations is independent of the number of regions defined in the problem. As a result, the method is more memory efficient than classical methods used to solve the boundary conditions. Because electromagnetic sources can be located inside the regions of a configuration, the scattering matrix formulation is developed to incorporate these sources into the solving process. The method is applied to a 3D electromagnetic configuration for verification.

Electromagnetic field boundary conditions for metamaterials

2017 ◽  
Author(s):  
Oleg A. Kazakov ◽  
Liudmila A. Uvarova
Keyword(s):  
Electromagnetic Field ◽  
Boundary Conditions ◽  
Field Boundary

High Voltage Transmission Line Electromagnetic Environment Analysis and Research on the Human Body Biological Effect

2014 ◽  
Vol 602-605 ◽  
pp. 2637-2640
Author(s):  
Ao Wang ◽  
Yu Hui Zhu ◽  
Rui Guan ◽  
Zi Wei Chen ◽  
Lian Qing Zhao
Keyword(s):  
Electromagnetic Field ◽  
Field Strength ◽  
High Voltage ◽  
Transmission Lines ◽  
Biological Effect ◽  
Electromagnetic Environment ◽  
Environment Analysis ◽  
High Voltage Transmission Line ◽  
Electromagnetic Field Strength ◽  
Ac Transmission

The research on 1000kV UHV AC transmission lines is to analysis the electromagnetic field strength around these lines, as well as the electromagnetic energy people absorbed at different distances under the lines. What’s more, suggestions for a further study and standards to improve are provided in the paper.

Sign in / Sign up

Export Citation Format

Share Document