Finite-element simulation of ceramic drying processes

A finite-element simulation for the drying process of ceramics is performed . The hear and moisture movements in green ceramics caused by the temperatu re gradient, moisture gradient, conduction, convection and evaporation are considered. The finite-element formulation for solving the temperature and moisture distributions, which not only change the volume but also induce th e hygro-thermal stress, is carried out. Employing the internally discontinu ous interface elements, the numerical divergence problem arising from sudde n changes in heat capacity in the phase zone is solved. In order to verify the reliability of the formulation, the drying process of a coal and the we tting process of a graphite epoxy are simulated and the results are compare d with the analytical solution and another investigator's result. Finally, the drying process of a ceramic electric insulator is simulated.