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One is the lowest order Nédélec edge element discretization.
Method relies on hybrid edge element BEM/FEM to compute near field edge element coefficients that are associated with near electric and magnetic fields at the boundary of the computational domain.
The adaptive method updates the eigenvalue and eigenfunction based on an a posteriori error estimate of the edge element discretization.
Special boundary integral formulation is presented that computes radar cross section directly from these edge element coefficients.
The effects of the edge element stiffness in EACL on the sensing ability, modal frequencies and loss factors of the system are investigated.
Numerical results are presented, which confirms the quasi-optimal convergence of the adaptive edge element method in terms of the numerical accuracy and the total degrees of freedom.
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The list of suboptimal elements includes serendipity (or trunk) elements, face elements, edge elements.
This partnership with the Solve community, will nurture Sci4S program with cutting edge elements for a greater impact.
However, the accuracy of standard edge elements can be criticised because of their low order.
However, the edge elements of this divertor are limited to only 5 MW/m2, and may be overloaded in certain plasma scenarios.
Example of suboptimal elements include: 8-node element for Poisson problem, Q2 P1 Stokes element, face elements for acoustic problem, edge elements for electromagnetic problems.
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