A PEC Conformal FDTD Algorithm with Distorted Grid Face Filtering for Enhanced Efficiency.
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| Title: | A PEC Conformal FDTD Algorithm with Distorted Grid Face Filtering for Enhanced Efficiency. |
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| Authors: | Liu, Chenshu1 Shelleylcs@stu.xjtu.edu.cn, Fan, Kaihang1 khfan@xjtu.edu.cn, Chen, Juan1 chen.juan.0201@xjtu.edu.cn |
| Source: | Applied Computational Electromagnetics Society Journal. Mar2026, Vol. 41 Issue 3, p216-224. 9p. |
| Subjects: | Finite difference time domain method, Stability criterion, Electrical conductors, Numerical analysis, Computer performance |
| Abstract: | The finite-difference time-domain (FDTD) method suffers from accuracy loss when applied to curved targets due to the staircase approximation. To improve the surface fitting accuracy of curved perfect electric conductor (PEC) objects, the conformal finitedifference time-domain (CFDTD) has been introduced. However, when high-precision conformal cell fitting is performed, the time step in CFDTD is significantly reduced by the presence of distorted small cells, leading to much lower computational efficiency. In this paper, a novel PEC CFDTD algorithm with distorted grid face filtering is proposed, which allows a larger time step. By deriving the stability condition of CFDTD, a Conformal Distortion Index (CDI) is defined and used as a filtering criterion. The conformal cells are retained in regions with low CDI, while areas with high CDI are reverted to the staircase mesh. A sensitivity study on a PEC sphere is used to determine an optimal filtering ratio of 5%, under which the proposed method greatly improves computational efficiency while incurring only a minimal loss in accuracy. Numerical examples are presented to validate the effectiveness of the proposed method. [ABSTRACT FROM AUTHOR] |
| Copyright of Applied Computational Electromagnetics Society Journal is the property of River Publishers and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 194529551 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: A PEC Conformal FDTD Algorithm with Distorted Grid Face Filtering for Enhanced Efficiency. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Liu%2C+Chenshu%22">Liu, Chenshu</searchLink><relatesTo>1</relatesTo><i> Shelleylcs@stu.xjtu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Fan%2C+Kaihang%22">Fan, Kaihang</searchLink><relatesTo>1</relatesTo><i> khfan@xjtu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Chen%2C+Juan%22">Chen, Juan</searchLink><relatesTo>1</relatesTo><i> chen.juan.0201@xjtu.edu.cn</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Applied+Computational+Electromagnetics+Society+Journal%22">Applied Computational Electromagnetics Society Journal</searchLink>. Mar2026, Vol. 41 Issue 3, p216-224. 9p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Finite+difference+time+domain+method%22">Finite difference time domain method</searchLink><br /><searchLink fieldCode="DE" term="%22Stability+criterion%22">Stability criterion</searchLink><br /><searchLink fieldCode="DE" term="%22Electrical+conductors%22">Electrical conductors</searchLink><br /><searchLink fieldCode="DE" term="%22Numerical+analysis%22">Numerical analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+performance%22">Computer performance</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The finite-difference time-domain (FDTD) method suffers from accuracy loss when applied to curved targets due to the staircase approximation. To improve the surface fitting accuracy of curved perfect electric conductor (PEC) objects, the conformal finitedifference time-domain (CFDTD) has been introduced. However, when high-precision conformal cell fitting is performed, the time step in CFDTD is significantly reduced by the presence of distorted small cells, leading to much lower computational efficiency. In this paper, a novel PEC CFDTD algorithm with distorted grid face filtering is proposed, which allows a larger time step. By deriving the stability condition of CFDTD, a Conformal Distortion Index (CDI) is defined and used as a filtering criterion. The conformal cells are retained in regions with low CDI, while areas with high CDI are reverted to the staircase mesh. A sensitivity study on a PEC sphere is used to determine an optimal filtering ratio of 5%, under which the proposed method greatly improves computational efficiency while incurring only a minimal loss in accuracy. Numerical examples are presented to validate the effectiveness of the proposed method. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Applied Computational Electromagnetics Society Journal is the property of River Publishers and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.13052/2026.ACES.J.410303 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 9 StartPage: 216 Subjects: – SubjectFull: Finite difference time domain method Type: general – SubjectFull: Stability criterion Type: general – SubjectFull: Electrical conductors Type: general – SubjectFull: Numerical analysis Type: general – SubjectFull: Computer performance Type: general Titles: – TitleFull: A PEC Conformal FDTD Algorithm with Distorted Grid Face Filtering for Enhanced Efficiency. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Liu, Chenshu – PersonEntity: Name: NameFull: Fan, Kaihang – PersonEntity: Name: NameFull: Chen, Juan IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 03 Text: Mar2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 10544887 Numbering: – Type: volume Value: 41 – Type: issue Value: 3 Titles: – TitleFull: Applied Computational Electromagnetics Society Journal Type: main |
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