A novel drying system – simultaneous use of ohmic heating with convectional air drying: System design and detailed examination using CFD

This paper introduces a novel drying system called ohmic assisted (OAD) – the simultaneous combination of heating and convectional air drying. The OAD improved characteristics potato slices. Depending on process conditions, time was shortened by 20–60% compared to conventional air-drying system. level applied voltage temperature were effective reduction. To achieve better understanding changes in slices during OAD, 3D mechanistic model developed validated with experimental moisture results. involves coupled heat, mass, momentum transfer as well heat generation due electrical current through porous media. A non-conjugate, macroscopic, non-equilibrium modelling approach helps define process. Drying material (potato) consists solid matrix, water, gas phases, where pressure-driven flow, binary diffusion phase change volume considered. predicts spatial distribution temperature, moisture, pressure material. prediction performance is satisfactory especially terms content since standard error estimate between 0.05 0.23. deeper presented about mechanisms highlighting strengths weaknesses