Scattering Analysis by a Stable Hybridization of the Finite Element Method and the Finite-Difference Time-Domain Scheme with a Brick-Tetrahedron Interface

2008 ◽  
Vol 28 (1-2) ◽  
pp. 3-17 ◽  
Author(s):  
David Degerfeldt ◽  
Thomas Rylander
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Finite Difference ◽  
Time Domain ◽  
Finite Difference Time Domain ◽  
The Finite Element Method ◽  
Difference Time ◽  
Element Method

Tandem Solar Cells Efficiency Prediction and Optimization via Deep Learning

2020 ◽  
Author(s):  
Chuqiao Yi ◽  
Yuliang Wu ◽  
Yayu Gao ◽  
Qingguo Du
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Deep Learning ◽  
Finite Difference ◽  
Time Domain ◽  
Finite Difference Time Domain ◽  
Electronic Devices ◽  
Optical Design ◽  
Tandem Solar Cells ◽  
Difference Time

Optical design plays an important role to improve the performance of opto-electronic devices. However, conventional design process with finite difference time domain (FDTD) or finite element method is usually time...

scholarly journals Finite Element Analysis of Square Aquifers Containing Pumped Wells and Comparison with Finite Difference Method

1983 ◽  
Vol 14 (2) ◽  
pp. 85-92 ◽  
Author(s):  
Tilahun Aberra
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Finite Difference ◽  
Discrete Time ◽  
Surface Element ◽  
Dimensionless Time ◽  
The Finite Element Method ◽  
Element Analysis ◽  
Wide Range ◽  
Element Method

The numerical solution of the behaviour of discrete time steps in digital computer analysis of square aquifers containing pumped wells is examined by using the finite element method with a 4 node linear quadrilateral isoparametric surface element. A wide range of time steps are used in the computation. The calculations show that discrete time steps can cause errors and oscillations in the calculations particularly when wells start and stop pumping. Comparison with known results obtained by theoretical and finite difference procedures has been considered. The main objective of this paper is to demonstrate comparison of the finite element and finite difference simulation results over a regular linear 4 node quadrilateral mesh suitable to represent the two numerical schemes with a marked similarity. The dimensionless time drawdown results of the finite element method agreed well with the finite difference and analytical results for small time increment. However, for large time increments, there are from slight to significant oscillations in the results and notable discrepancies are observed in the solutions of the two numerical methods.

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