Continuous dielectric permittivity I: Specific features of the   dielectric continuum solvation model with a position-dependent permittivity   function
  We consider a modified formulation for the recently developed new approach in the continuum solvation theory (Basilevsky, M. V., Grigoriev, F. V., Nikitina, E. A., Leszczynski, J., J. Phys. Chem. B 2010, 114, 2457), which is based on the exact solution of the electrostatic Poisson equation with the space-dependent dielectric permittivity. Its present modification ensures the property curl E = 0 for the electric strength field E inherent to this solution, which is the obligatory condition imposed by Maxwell equations. The illustrative computation is made for the model system of the point dipole immersed in a spherical cavity of excluded volume. 
M.V. Basilevsky, F. V. Grigoriev, Oleg Kupervasser
physics.chem-ph cond-mat.mes-hall cond-mat.stat-mech