Heating patterns of an inclusion particle (discrete phase) and a medium (continuous phase) under static and agitated (mixed) conditions were examined experimentally for cases where the inclusion particle was either less or more conductive than the medium. The experiment was conducted at two levels of electric field strength (0.8 and 1.28 kV/cm, corresponding to applied voltages of 77.8 and 124.7 V) to examine ohmic heating characteristics of the solid–liquid mixture at considerably different power inputs and two levels of particle-to-tube cross-section area ratios to study the effect of particle size on the heating characteristics of both phases and overall heating rates of the mixture.