An effective superelement-by-superelement solution method for large finite element computations
β Scribed by M. Papadrakakis; N. Bitoulas; K. Hatjikonstantinou
- Book ID
- 108033429
- Publisher
- Elsevier Science
- Year
- 1991
- Weight
- 412 KB
- Volume
- 2
- Category
- Article
- ISSN
- 0956-0521
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## Abstract A computational procedure based on gradient iterative techniques is proposed for the solution of large problems to which the finite element method is applicable. In linear problems the procedure can be used either for solving the set of algebraic equations or for the complete inversion
A two-dimensional, fully numerical approach to the four-component Dirac equation using the finite-element-method (FEM) is employed for a diatomic system. For H: , an absolute accuracy of about 1 O-lo au for the la, orbital energy is obtained by using only 2601 grid points. Using a difference method,