B. P. A. GRANDJEAN, P. J. CARREAU
The thermal transient behavior of three-phase fluidized beds was investigated for a liquid viscosity ranging from 35 to 75 mPa·s. For the operating conditions used in this study, a 6 mm glass particle bed exhibited a thermal response similar to that of a fixed bed. The transient responses, which were not significantly affected by gas sparging, were observed to be faster for heating than for cooling. This behavior was analyzed using a model that assumes liquid plug flow through stationary particles, applying combined free and forced convection correlations for heat transfer around the particles. Different correlations were proposed to quantify the contribution of natural convection to the liquid-to-particle heat transfer in both heating and cooling modes. The effect of gas sparging demonstrated a strong influence on the 2.0 mm particle bed responses, while affecting the 3.9 mm bed responses only moderately. Axial dispersion models for the liquid and solid phases were employed for the analysis. For the 3.9 mm particle bed, the axial dispersion coefficient of the solids was found to be comparable to that of the liquid coefficient. In contrast, the 2 mm particle bed's dispersion coefficient was found to be five times that of the liquid, underscoring significant differences in thermal dynamics within various particle sizes.
@article{95b00703-8c93-4d36-b94c-64812bcd4e71,
title={Transient heating and cooling of cocurre},
author={B. P. A. GRANDJEAN and P. J. CARREAU},
year={2026},
language={en}
}TY - JOUR TI - Transient heating and cooling of cocurre AU - B. P. A. GRANDJEAN AU - P. J. CARREAU PY - 2026 LA - en ER -
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