The electric field has been computed using the hybrid technique FEM-BEM, so the motion modifies only the boundary conditions on the surface of the wooden piece; FEM mesh inside the piece as well as some of the elements of the matrix associated to the inner nodes remain unchanged. The electric field problem is coupled with the thermal field problem because the complex permittivity depends on the temperature and the specific losses are influenced by the electric field strength. Besides that, the moisturized wood to be dried is moving and the water vaporization has impact on the thermal field. Our paper proposes a method for solving the electric field problem coupled with thermal diffusion and mass problems, taking into consideration the movement of the wood object exposed to the drying process

Keywords: Hybrid finite element method (FEM), Boundary element method (BEM), Drying in radiofrequency (RF) electromagnetic field, Wood industry