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A Nonstandard Path Integral Model for Curved Surface Analysis

Author

Listed:
  • Tadao Ohtani

    (Independent Researcher, Asahikawa 070-0841, Japan)

  • Yasushi Kanai

    (Department of Engineering, Faculty of Engineering, Niigata Institute of Technology, Kashiwazaki 945-1195, Japan)

  • Nikolaos V. Kantartzis

    (Department of Electrical and Computer Engineering, Faculty of Engineering, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece)

Abstract

The nonstandard finite-difference time-domain (NS-FDTD) method is implemented in the differential form on orthogonal grids, hence the benefit of opting for very fine resolutions in order to accurately treat curved surfaces in real-world applications, which indisputably increases the overall computational burden. In particular, these issues can hinder the electromagnetic design of structures with electrically-large size, such as aircrafts. To alleviate this shortcoming, a nonstandard path integral (PI) model for the NS-FDTD method is proposed in this paper, based on the fact that the PI form of Maxwell’s equations is fairly more suitable to treat objects with smooth surfaces than the differential form. The proposed concept uses a pair of basic and complementary path integrals for H -node calculations. Moreover, to attain the desired accuracy level, compared to the NS-FDTD method on square grids, the two path integrals are combined via a set of optimization parameters, determined from the dispersion equation of the PI formula. Through the latter, numerical simulations verify that the new PI model has almost the same modeling precision as the NS-FDTD technique. The featured methodology is applied to several realistic curved structures, which promptly substantiates that the combined use of the featured PI scheme greatly improves the NS-FDTD competences in the case of arbitrarily-shaped objects, modeled by means of coarse orthogonal grids.

Suggested Citation

  • Tadao Ohtani & Yasushi Kanai & Nikolaos V. Kantartzis, 2022. "A Nonstandard Path Integral Model for Curved Surface Analysis," Energies, MDPI, vol. 15(12), pages 1-21, June.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:12:p:4322-:d:837780
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    References listed on IDEAS

    as
    1. Zeyang Zhou & Jun Huang, 2020. "Study of the Radar Cross-Section of Turbofan Engine with Biaxial Multirotor Based on Dynamic Scattering Method," Energies, MDPI, vol. 13(21), pages 1-20, November.
    2. Alaa Loubani & Noureddine Harid & Huw Griffiths & Braham Barkat, 2019. "Simulation of Partial Discharge Induced EM Waves Using FDTD Method—A Parametric Study," Energies, MDPI, vol. 12(17), pages 1-13, September.
    3. Erika Stracqualursi & Rodolfo Araneo & Giampiero Lovat & Amedeo Andreotti & Paolo Burghignoli & Jose Brandão Faria & Salvatore Celozzi, 2020. "Analysis of Metal Oxide Varistor Arresters for Protection of Multiconductor Transmission Lines Using Unconditionally-Stable Crank–Nicolson FDTD," Energies, MDPI, vol. 13(8), pages 1-19, April.
    4. Jon T. Leman & Robert G. Olsen, 2020. "Bulk FDTD Simulation of Distributed Corona Effects and Overvoltage Profiles for HSIL Transmission Line Design," Energies, MDPI, vol. 13(10), pages 1-22, May.
    5. Łukasz Januszkiewicz, 2021. "Analysis of Shielding Properties of Head Covers Made of Conductive Materials in Application to 5G Wireless Systems," Energies, MDPI, vol. 14(21), pages 1-26, October.
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