The most important benefits with the boundary element method for electrostatics is that there is no need for a volume mesh in the in-between and surrounding air and there is no need to add infinite elements for the surrounding unbounded domain. For the Electromechanics, Boundary Elements interface, the Solid Mechanics interface is based on finite elements whereas the Electrostatics interface is based on boundary elements. Physics interfaces based on the boundary element method can be combined with those based on the finite element method. The backward coupling to the Electrostatics interface is due to the deformations of the boundaries. ![]() The coupling is a boundary load on a structure caused by the Maxwell stress at the interface of the solid domains and nonsolid voids, where the electric field is computed using the boundary element method. The Electromechanics, Boundary Elements interface combines the functionality of the Solid Mechanics and Electrostatics, Boundary Elements interfaces to model the deformation of electrostatically actuated structures. New Electromechanics, Boundary Elements Interface Learn more about these MEMS Module updates below. For users of the MEMS Module, COMSOL Multiphysics ® version 5.4 includes the boundary element method for electrostatics in electromechanics modeling and new structural mechanics related functionality, as well as three new MEMS tutorial models.
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