SCALABLE, FINITE-ELEMENT ANALYSIS OF ELECTROMAGNETIC SCATTERING AND RADIATION - ERROR ESTIMATION AND H-ADAPTIVITY

In this paper a method for simulating electromagnetic fields scattered from complex objects is reviewed; namely, an unstructured finite elem ent code that does not use traditional mesh partitioning algorithms. T he complete software package is implemented on the Gray T3D massively parallel processor using both Gray Adaptive FORTRAN (CRAFT) compiler c onstructs to simplify portions of the code that operate on the irregul ar data, and optimized message passing constructs on portions of the c ode that operate on regular data and require optimum machine performan ce. The above finite element solution package is then integrated into an error estimation and adaptive mesh refinement algorithm. An error f or the fields over the mesh is estimated and used to drive an adaptive mesh refinement algorithm that refines the mesh where errors are abov e a given tolerance. This refined mesh is then used once again for a f inite element solution of the fields. After estimating the error a sec ond time, the mesh is again refined as needed. This process continues until the error is reduced to an allowable level. (C) 1998 Published b y Elsevier Science Ltd. All rights reserved.