Smoothed Particle Method for Full-Wave Simulation of Microwave Applicators With Translational-Rotary Elements

Elements in both translation and rotation such as the screw propeller are widely applied to improve microwave heating uniformity. However, it is challenging to numerically model this heating process due to the difficulties in dynamic meshing for the moving elements. Our previous transformation optics method will be also burdensome to use in this case because it is very difficult to get the permittivity and permeability tensors. In this letter, a mesh-free numerical calculation based on a smoothed particle method is proposed to solve this complicated case. The proposed method uses smoothed particles to replace the meshes. Thus, the motion of the elements can be replaced by the motion of the particles and the dynamic meshing process can be avoided. A 2-D model is computed and the results are compared with those calculated by the finite element method. Good agreements are achieved.