Results 11 to 20 of about 24,972 (270)

CALCULATION OF TEMPERATURE DISTRIBUTION IN HEAVY OIL RESERVOIRS BY ELECTROMAGNETIC HEATING

open access: yesCT&F Ciencia, Tecnología & Futuro, 2023
The introduction of heat into a reservoir has proven to be an effective way to reduce the viscosity of heavy oils by increasing the temperature in the formation.
Herling Gonzalez Alvarez   +3 more
doaj   +1 more source

Analysis of Specific absorption rate in the human head model exposed to radiofrequency radiation [PDF]

open access: yesKragujevac Journal of Science, 2023
As mobile phones have become a necessity in modern society, and there is an increasing number of users of various ages, it is imperative to investigate the impact of mobile phone radiofrequency electromagnetic radiation (RF) on humans.
Milošević Marko M.   +5 more
doaj  

Ultra-Broadband High-Efficiency Solar Absorber Based on Double-Size Cross-Shaped Refractory Metals

open access: yesNanomaterials, 2020
In this paper, a theoretical simulation based on a finite-difference time-domain method (FDTD) shows that the solar absorber can reach ultra-broadband and high-efficiency by refractory metals titanium (Ti) and titanium nitride (TiN).
Hailiang Li   +5 more
doaj   +1 more source

Peculiarities of focusing circularly and radially polarized super-Gaussian beams using ring gratings with varying relief height

open access: yesКомпьютерная оптика, 2022
The focusing features of a super-Gaussian beam, as well as Laguerre-super-Gaussian (1,0) modes with radial and circular polarizations on ring gratings (direct and inverse) with a variable height of individual relief rings were investigated in this paper.
D.A. Savelyev
doaj   +1 more source

Unified GSTC-FDTD Algorithm for the Efficient Electromagnetic Analysis of 2D Dispersive Materials [PDF]

open access: yesJournal of Electromagnetic Engineering and Science, 2023
The finite-difference time-domain (FDTD) method has been widely used for the electromagnetic wave analysis of complex media. Conventional FDTD analyses of very thin two-dimensional (2D) dispersive materials require overwhelming computing resources ...
Sangeun Jang   +3 more
doaj   +1 more source

Analyzing electromagnetic structures with curved boundaries on Cartesian FDTD meshes [PDF]

open access: yes, 1998
In this paper, a new finite-difference time-domain (FDTD) algorithm is investigated to analyze electromagnetic structures with curved boundaries using a Cartesian coordinate system. The new algorithm is based on a nonorthogonal FDTD method. However, only
Railton, CJ, Hao, Y
core   +1 more source

An analytical and numerical analysis of several locally conformal FDTD schemes [PDF]

open access: yes, 1999
The virtues of the finite-difference time-domain (FDTD) method for the electromagnetic analysis of arbitrary complex metal and dielectric structures are well known.
Schneider, JB, Railton, CJ
core   +1 more source

Estudo comparativo de códigos paralelos em Fortran, C e Java na análise de uma antena monopolo, utilizando técnica numérica de FDTD

open access: yesRevista Principia, 2006
As técnicas numéricas são ferramentas extremamente poderosas utilizadas na solução de diversos problemas, pois são capazes de manipular grandes quantidades de dados, com complicadas geometrias, que são tão comuns na prática de simulações empregadas nas ...
Josivaldo de Souza Araújo   +3 more
doaj   +1 more source

The treatment of geometrically small structures in FDTD by the modification of assigned material parameters [PDF]

open access: yes, 2005
A number of different improvements to the analysis by finite-difference time-domain (FDTD) of small structures, such as wires, strips and slots have been proposed in the literature.
Paul, DL   +3 more
core   +1 more source

Research on Crosstalk Characteristics between Intersecting Polymer Micro-nano Fibers

open access: yesGuangtongxin yanjiu, 2021
In order to reduce the crosstalk between the densely arranged polymer micro-nano fibers, this paper proposes to analyze the dependence of crosstalk on the intersection angle, diameter, separation, modal polarizations and wavelength of two intersecting ...
Yu-ling SHANG   +3 more
doaj   +1 more source

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