Estimation of phase boundary by front points method in electrical impedance tomography

Numerical works are conducted to develop a visualization technique for the phase distribution in a two-phase system by electrical impedance tomography (EIT) technique, which reconstructs the conductivity distribution with the electrical responses that are determined by corresponding excitations. For the two-phase flow system, the impedance of each phase can be known - but here the phase boundary depending on the distribution of dispersed phase is of particular interest. In the present study, the image reconstruction problem is derived as a boundary estimation one and a new algorithm is developed for the estimation of phase boundary based on the front points tracking technique. To test the robustness of the proposed algorithm, some numerical simulations are conducted. Numerical works show that the proposed algorithm can treat two-phase systems reasonably even with some errors in measurement data.