Three-dimensional Green's functions for a fluid and pyroelectric two-phase material

The three-dimensional Green's functions for a steady-state point heat source in the interior of a fluid and pyroelectric two-phase material are presented in this paper. By virtue of the three-dimensional general solutions which are expressed in harmonic functions, six newly introduced harmonic functions with undetermined constants are constructed. Then, all the pyroelectric components in the fluid and pyroelectric two-phase material can be derived by substituting these harmonic functions into the corresponding general solutions. And the undetermined constants can be obtained by the interface compatibility conditions and the mechanical, electric and thermal equilibrium conditions. Numerical results are given graphically by contours.