Adaptive BEM and FEM Meshing Increases Confidence in Electromagnetic Simulation Results
Chances are that if you’ve done simulation using Finite Element Method (FEM) or Boundary Element Method (BEM) software, at some point you’ve discovered or been told that your mesh was not adequate to obtain accurate results. At that point, you have two options available. You can globally increase the mesh density on your model, or you can use expertise and experience to search for areas on the model where an increased density would help the overall accuracy of the solution and then use tools available to mesh the model more finely in those areas.
Generally speaking, most organizations don’t have a meshing expert. In fact, in most organizations, an engineer, physicist or designer includes computer simulation as only a small part of their duties. They have neither the time nor the desire to become experts in generating meshes for different types of simulation methods. For them, the ability of the simulation software to place an appropriate mesh on their model is critical. Additionally, if the application can show that it has converged to a stable result based on results from other meshes, they can have confidence in the simulation. This is where an adapting mesh becomes so important. In addition to saving the user time and effort in generating a mesh appropriate for obtaining accurate results, a proper adaptive mesh can also save solving time. By placing denser elements only where needed the most and making the mesh coarser where element density is not as critical, the size of the solution matrix and therefore the solving time is minimized.