3-D Domain Decomposition Based Hybrid Finite-Difference Time-Domain/Finite-Element Time-Domain Method With Nonconformal Meshes

Sun, Qingtao; Ren, Qiang; Zhan, Qiwei; Liu, Qing

doi:10.1109/tmtt.2017.2686386

Cited by 25 publications

(8 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to alleviate such condition, the subgridding method is one of the most widely spread and efficient methods. However, the existed subgridding method shows limitation in curves simulation at interfaces of different meshes due to the interpretation operation 22–24 . To alleviate such condition, an alternative subgridding method in proposed in non‐uniform curve meshes.…”

Section: Formulationmentioning

confidence: 99%

“…The CFS‐PML formulation shows advantages in low‐frequency evanescent waves and late‐time reflections 21 . For nonuniform domains, subgridding method exhibits appreciable advantages in accuracy and efficiency compared with FDTD algorithm which shows great potential in investigation 22 . However, the existed method shows its limitation in accuracy due to the interpretation operation in curves simulation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

ICN‐FDTD scheme with absorption boundary condition for nonuniform rotational symmetric geometrics

Dong

Liu

et al. 2022

Int J Numerical Modelling

View full text Add to dashboard Cite

Based on iterated Crank–Nicolson (CN) procedure, an alternative algorithm with perfectly matched layer (PML) formulation is proposed in the body‐of‐revolution (BOR) finite‐difference time‐domain (FDTD) lattice for the simulation of rotational symmetric geometrics. For the nonuniform domain simulation, an alternative subgridding method is employed to during the simulation. The iterated CN procedure improves the efficiency through preventing the calculation of tri‐diagonal matrices. The alternative subgridding method enhances the accuracy in nonuniform domains by the calculation of subregions. Numerical example is carried out for the demonstration of effectiveness including efficiency, accuracy and absorption. Through the results, the proposed scheme shows considerable absorption and accuracy improvement in nonuniform domains. Compared with the other CN schemes, the iterated CN procedure can significantly increase the efficiency with small time steps. In conclusion, the advantages and novelty of the proposed algorithm can be described as follows: (1) The iterated CN procedure is proposed for rotational symmetric geometrics. (2) Absorption boundary condition for iterated CN is proposed in BOR‐FDTD. (3) An alternative subgridding method for iterated CN procedure is proposed in BOR‐FDTD lattice. Thus, the proposed algorithm shows potential in nonuniform rotational symmetric geometrics open region simulation.

show abstract

Section: Formulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

ICN‐FDTD scheme with absorption boundary condition for nonuniform rotational symmetric geometrics

Dong

Liu

et al. 2022

Int J Numerical Modelling

View full text Add to dashboard Cite

show abstract

“…In each and every case, the superscript ∆ represents the value of different variables for the finite element indicated by ∆. [ 25,26 ] Equation (9) shows that the four matrices are required for the solution of the FEM problem. Some of the matrices have already been explained in Equation (9): ζand R ; the remaining two matrices Z and

\bar{W}

require explaining.…”

Section: Galerkin Approachmentioning

confidence: 99%

A Novel Approach to Power Quality Analysis: Adaptive FEM Algorithm with Sparse Signal Decomposition

Rahul

2020

Advcd Theory and Sims

View full text Add to dashboard Cite

An adaptive approach of discretized triangular mesh based on finite element method hybrid with type‐2 fuzzy is utilized for detection and classification of power quality events. The concept of sparse signal decomposition is utilized with extraction of disturbances from power signals. An adaptive finite element method is then applied with the concept of stiffness matrix which extracts some relevant features of power quality events that act as input to type‐2 fuzzy classifiers. Finally performance comparison is carried out, the results of which show that the proposed technique has potential to analyze disturbances with high accuracy and minimum computational overhead.

show abstract

“…In addition to the boundary treatment scheme of FDTD/PE hybrid method, similar schemes can be found in other mixed numerical methods. In [7], a buffer is used to implement the coupling between FDTD and FETD regions. In [8], there is a cubic layer between the SETD region and the FDTD region, and an explicit SETD/FDTD hybrid approach is put forward.…”

Section: Introductionmentioning

confidence: 99%

A Fast Prediction Method for the Radio Propagation under the Obstacle Environment

Ma¹,

Wen²,

Zhang³

et al. 2022

PIER C

View full text Add to dashboard Cite

To rapidly simulate the forward electromagnetic scattering of multiple obstacles, we propose a new forward scattering prediction model, which can effectively simulate the propagation of electromagnetic waves in a large-scale environment, accurately calculate the scattering of multi-scale structures, and realize multi-region parallel computation. Specifically, the proposed model consists of an obstacle region and a large-scale environment region. To make the model consistent with the real scene quickly and accurately, the time-domain parabolic equation (TDPE) and discontinuous Galerkin time-domain (DGTD) method are employed to simulate the propagation of electromagnetic waves and the scattering of obstacles, respectively. At the same time, each region is equivalent to a linear timeinvariant (LTI) system, and the transfer function of each system is calculated by the discrete Laplace Z-transform to realize multi-region parallel computation. This model can simulate the propagation of the electromagnetic wave in multiple obstacles more quickly under large-scale background than the existing obstacle forward scattering model. Numerical results demonstrate that the proposed model is effective in terms of accuracy and runtime performance.

show abstract

3-D Domain Decomposition Based Hybrid Finite-Difference Time-Domain/Finite-Element Time-Domain Method With Nonconformal Meshes

Cited by 25 publications

References 23 publications

ICN‐FDTD scheme with absorption boundary condition for nonuniform rotational symmetric geometrics

ICN‐FDTD scheme with absorption boundary condition for nonuniform rotational symmetric geometrics

A Novel Approach to Power Quality Analysis: Adaptive FEM Algorithm with Sparse Signal Decomposition

A Fast Prediction Method for the Radio Propagation under the Obstacle Environment

Contact Info

Product

Resources

About