FETDFinite-Element Time Domain
FETDFlash Element Tower Defense (gaming)
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Donderici and Teixeira incorporated conformal PML into the mixed FETD algorithm by utilizing PML constitutive tensors in 2008 [18].
FETD can be implemented in two ways, one based on the curl-curl second order wave equation [13-16] and the other based on the first order Maxwell's equations [17-20].
On the other hand, the FETD method can be also developed using E and H as field variables.
One drawback of the FETD method, compared to the FDTD method, is its need to invert a large sparse matrix.
* Analyze the eigenvalues of FETD to show the effectiveness of EB scheme to suppress the spurious modes with the same order basis functions for E and B.
* Apply the strongly well-posed PML to EB scheme FETD and find the optimal thickness of PML, which will provide a guidance for future possible applications with unbounded problems.
* As the EB scheme is advantageous, the DG-FETD based on EB scheme can be implemented to further enhance the computation efficiency compared to single domain EB scheme FETD.
In FETD, reference elements are introduced to make the code more generalizable and easier to debug.
The explicit leap frog is chosen as the time stepping scheme for FETD, in which the E and B use half step staggered grids in the temporal dimension.
This new method combines the Newmark [beta][gamma] difference method which is widely used in FETD calculation in dispersive medium.