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Showing 1 to 14 of 14 for “"perfectly matched layer (PML)"”.
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A Higher-Order Perfectly Matched Layer for Open-Region, Waveguide, and Periodic Electromagnetic Problems
In this dissertation the idea of a higher-order perfectly matched layer (PML) is proposed. Using a metric coefficient that includes both the regular and the complex frequency shifted (CFS) PMLs, it is possible to obtain a PML that includes the advantages of both of them. The second-order PML is …
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Efficient mesh truncation techniques for the solution of Maxwell's equations using the finite-difference time domain method
… to simulate the infinite domain. The Berenger perfectly matched layer (PML) technique is shown to offer the potential for near reflectionless absorption of propagating waves at the expense of additional layers of absorbing material with twice the number of unknowns as in the interior domain. …
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Design and simulation for the fabrication of integrated semiconductor optical logic gates
… complex-frequency leaky mode computations with perfectly matched layer (PML) boundary conditions. Finite difference time domain (FDTD) method with PML is utilized in calculating reflections produced by abrupt interfaces, including a tip of an adiabatic taper coupler.
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Advanced Time-Domain Finite-Element Method for Electromagnetic Analysis
… both two-dimensional and three-dimensional perfectly matched layer (PML) schemes are developed for TDFEM simulation of open-region electromagnetic scattering and radiation problems. Sixth, a general approach is proposed for the stability analysis of the TDFEM. Finally, the great application …
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A Higher-Order Finite Element Method for Computing the Radar Cross Section of Bodies of Revolution
… using two methods. The first method is the perfectly matched layer (PML). This method has a number of parameters that must be optimized to obtain good results. Furthermore, the PML must be kept a reasonable distance away from the scatterer, which causes the number of unknowns to be …
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Perfectly Matched Layer Absorbing Boundary Conditions for the Discrete Velocity Boltzmann-BGK Equation
<p>Perfectly Matched Layer (PML) absorbing boundary conditions were first proposed by Berenger in 1994 for the Maxwell's equations of electromagnetics. Since Hu first applied the method to Euler's equations in 1996, progress made in the application of PML to Computational Aeroacoustics (CAA) …
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Propagation Of Sound In The Vicinity Of Rigid Porous Interfaces
… are considered: (1) a semi-infinite porous layer; (2) a porous hard-backed surface; and (3) a porous impedance-backed layer. A closed-form solution and numerical methods are derived with respect to each rigid porous interface condition.</p> <p>A modified saddle-point method is exploited to …
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Effective development of cylindrical finite-difference time-domain for electromagnetics applications
… and collect the results. Thus, a conventional perfectly matched layer (PML) can be used to truncate computational regions in numerical methods. This will reduce the memory size and the time to complete the run. However, the accuracy of the PML is necessary in finite-difference time-domain …
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Modelling and analysis of complex electromagnetic problems using FDTD subgridding in hybrid computational methods. Development of hybridised Method of Moments, Finite-Difference Time-Domain method and subgridded Finite-Difference Time-Domain method for precise computation of electromagnetic interaction with arbitrarily complex geometries
… geometries are modelled. However, the Perfectly Matched Layer (PML) concept has been employed to circumvent this difficulty. The establishment of edge elements has greatly improved the performance of this method and the computational burden due to huge numbers of time steps, in the …
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Analysis and Application of Perfectly Matched Layer Absorbing Boundary Conditions for Computational Aeroacoustics
<p>The Perfectly Matched Layer (PML) was originally proposed by Berenger as an absorbing boundary condition for Maxwell's equations in 1994 and is still used extensively in the field of electromagnetics. The idea was extended to Computational Aeroacoustics in 1996, when Hu applied the method to …
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Finite element modelling of photonic crystal fibres
… (BPM) based on the versatile FEM. The robust perfectly matched layer (PML) boundary condition has been introduced to the modal solution approach. The effects of d2/A, operating wavelength and number of air holes have been thoroughly detailed and explained. In this study, it has been identified …
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Finite element characterisation of photonic crystal fibres
… of the conformal transformation and the Perfectly Matched Layer (PML) were undertaken to determine the bending and leakage losses of several designs of Photonic Crystal Fibres. This was carried out by varying key parameters such as the pitch (Λ), diameter (d) and air-filling fraction …
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Discontinuous Galerkin Based Multi-Domain Multi-Solver Technique for Efficient Multiscale Electromagnetic Modeling
… to exploit its spectral accuracy, and for perfectly matched layer (PML) and layered structures the finite different method is used to improve computational efficiency.</p><p>For time domain modeling, firstly hybrid spectral element-finite element method in time domain (hybrid SETD-FETD) is …
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Unified conformal/nonconformal domain decomposition methods for solving large-scale multi-region electromagnetic problems
In this dissertation, robust and efficient numerical algorithms are developed based on the dual-primal finite element tearing and interconnecting (FETI-DP) method for the full-wave analysis of large-scale electromagnetic problems in three dimensions. These algorithms are designed to expand the …