Abstract
ABSTRACT: Real‐time temperature maps of ohmically heated liquid‐particulate mixtures were acquired using the Proton Resonance Frequency (PRF) shift method incorporated into a fast Magnetic Resonance Imaging (MRI). Noise in the MRI images induced by the electrical heating power was eliminated by a post‐processing algorithm of the PRF shift method and correction phase images. The time‐dependent interface heat transfer coefficients (hfp) were determined during the holding period using the MRI temperature maps and numerical solutions to the Fourier's 2nd law. The calculated values of hfp range from 30 to 105 W/m2K, consistent with literature values for natural convection. These results provide crucial data for understanding the ohmic heating process.
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