Hybrid FEM/BEM for human heads exposed to high frequency electromagnetic radiation

Hrvoje Dodig; Mario Cvetković; Dragan Poljak; Akimasa Hirata; Ilkka Laakso

doi:10.2495/SAFE170341

Hybrid FEM/BEM for human heads exposed to high frequency electromagnetic radiation

Hrvoje Dodig, Mario Cvetković, Dragan Poljak, Akimasa Hirata, Ilkka Laakso

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Abstract

In this paper the hybrid finite element/boundary element method (FEM/BEM) is used to analyze the human head exposed to plane wave radiation. The radar cross-section (RCS) of a coated sphere at interior resonance frequency obtained using the proposed method showed an excellent agreement with the analytical Mie series solution, thus verifying the validity of the formulation. High frequency electromagnetic wave incident on the human head representing an unbounded scattering problem is formulated via the Stratton-Chu expression, while the interior domain is governed by the vector Helmholtz equation. Some computational examples for the induced electric field are presented. Numerical results showed the highest values of the induced fields around the ocular region and the nose. The presented method is found to be useful in the assessment of the induced fields in the anatomically realistic human models.

Original language	English
Pages (from-to)	369-378
Number of pages	10
Journal	WIT Transactions on the Built Environment
Volume	174
DOIs	https://doi.org/10.2495/SAFE170341
Publication status	Published - 1 Jan 2018
MoE publication type	A1 Journal article-refereed

Keywords

Boundary element method
Finite element method
Human exposure to electromagnetic fields
Human head
Hybrid method

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10.2495/SAFE170341

ELEC_dodig_Hybrid_fem-bemSAFE17034FU1-1Final published version, 644 KB

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title = "Hybrid FEM/BEM for human heads exposed to high frequency electromagnetic radiation",

abstract = "In this paper the hybrid finite element/boundary element method (FEM/BEM) is used to analyze the human head exposed to plane wave radiation. The radar cross-section (RCS) of a coated sphere at interior resonance frequency obtained using the proposed method showed an excellent agreement with the analytical Mie series solution, thus verifying the validity of the formulation. High frequency electromagnetic wave incident on the human head representing an unbounded scattering problem is formulated via the Stratton-Chu expression, while the interior domain is governed by the vector Helmholtz equation. Some computational examples for the induced electric field are presented. Numerical results showed the highest values of the induced fields around the ocular region and the nose. The presented method is found to be useful in the assessment of the induced fields in the anatomically realistic human models.",

keywords = "Boundary element method, Finite element method, Human exposure to electromagnetic fields, Human head, Hybrid method",

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T1 - Hybrid FEM/BEM for human heads exposed to high frequency electromagnetic radiation

AU - Dodig, Hrvoje

AU - Cvetković, Mario

AU - Poljak, Dragan

AU - Hirata, Akimasa

AU - Laakso, Ilkka

PY - 2018/1/1

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N2 - In this paper the hybrid finite element/boundary element method (FEM/BEM) is used to analyze the human head exposed to plane wave radiation. The radar cross-section (RCS) of a coated sphere at interior resonance frequency obtained using the proposed method showed an excellent agreement with the analytical Mie series solution, thus verifying the validity of the formulation. High frequency electromagnetic wave incident on the human head representing an unbounded scattering problem is formulated via the Stratton-Chu expression, while the interior domain is governed by the vector Helmholtz equation. Some computational examples for the induced electric field are presented. Numerical results showed the highest values of the induced fields around the ocular region and the nose. The presented method is found to be useful in the assessment of the induced fields in the anatomically realistic human models.

AB - In this paper the hybrid finite element/boundary element method (FEM/BEM) is used to analyze the human head exposed to plane wave radiation. The radar cross-section (RCS) of a coated sphere at interior resonance frequency obtained using the proposed method showed an excellent agreement with the analytical Mie series solution, thus verifying the validity of the formulation. High frequency electromagnetic wave incident on the human head representing an unbounded scattering problem is formulated via the Stratton-Chu expression, while the interior domain is governed by the vector Helmholtz equation. Some computational examples for the induced electric field are presented. Numerical results showed the highest values of the induced fields around the ocular region and the nose. The presented method is found to be useful in the assessment of the induced fields in the anatomically realistic human models.

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Hybrid FEM/BEM for human heads exposed to high frequency electromagnetic radiation

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