Method for implementing PML (perfectly matched layers) in DGTD (discontinuous Galerkin time domain) by aid of hybrid triangular prism-tetrahedron grids
A technology of tetrahedral grid and implementation method, which is applied in special data processing applications, instruments, electrical digital data processing, etc., and can solve the problems of cumbersome calculation, accuracy and calculation amount, and cannot solve PML truncation efficiently and accurately.
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[0069] The technical scheme of the present invention will be further explained below in conjunction with the drawings.
[0070] Such as figure 1 As shown, the present invention provides a method for implementing PML in DGTD by using a hybrid triangular prism-tetrahedral grid, which includes the following steps:
[0071] S1. Select the calculation model according to the actual situation, design the PML absorption layer according to the specific model, and establish the Maxwell equations of the PML region and the non-PML region in the calculation domain; figure 2 ) And metal balls (reference image 3 ) As an example to illustrate the specific implementation method of this step: design computational domain Ω=Ω PML +Ω TOT , Where Ω represents the total calculation domain, Ω PML Represents the PML area in the computational domain, Ω TOT Represents the non-PML area in the computing domain;
[0072] The passive 3D time-domain Maxwell equation in the non-PML region is expressed as:
[0073...
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