TY - JOUR
T1 - Experimental study of heat transfer and transport properties of granular material in indirectly heated rotary drums
AU - Chou, Shih Hao
AU - Hsiau, Shu San
AU - Liu, Shang Yu
N1 - Publisher Copyright:
© 2024 Elsevier Ltd
PY - 2025/3
Y1 - 2025/3
N2 - The study of heat transfer in granular flows has extensive applications. This paper reports an experimental investigation of the heat transfer behavior in an indirectly heated rotary drum system with granular materials of various sizes. In this study, various particle motion behaviors were generated by applying inertial forces at different rotation speeds, and noncontact infrared thermography and particle tracking velocimetry were employed to quantify the thermal temperature and velocity distribution characteristics within the system. In addition, the heat transfer coefficient between the granular bed and the heated wall was determined using thermal balance equations, and the self-diffusion coefficient, which describes the diffusive motion of particles, was obtained by analyzing the random fluctuations of the particles. The results demonstrate that smaller particle sizes and increased rotation speed facilitate thermal temperature increase. Furthermore, a positive linear correlation between the heat transfer coefficient and the self-diffusion coefficient was observed, which implies that the forced thermal convection is a significant mechanism in enhancing the heat transfer behavior of granular systems.
AB - The study of heat transfer in granular flows has extensive applications. This paper reports an experimental investigation of the heat transfer behavior in an indirectly heated rotary drum system with granular materials of various sizes. In this study, various particle motion behaviors were generated by applying inertial forces at different rotation speeds, and noncontact infrared thermography and particle tracking velocimetry were employed to quantify the thermal temperature and velocity distribution characteristics within the system. In addition, the heat transfer coefficient between the granular bed and the heated wall was determined using thermal balance equations, and the self-diffusion coefficient, which describes the diffusive motion of particles, was obtained by analyzing the random fluctuations of the particles. The results demonstrate that smaller particle sizes and increased rotation speed facilitate thermal temperature increase. Furthermore, a positive linear correlation between the heat transfer coefficient and the self-diffusion coefficient was observed, which implies that the forced thermal convection is a significant mechanism in enhancing the heat transfer behavior of granular systems.
KW - Contact heat transfer
KW - Granular material
KW - Particle self-diffusion
KW - Rotary drums
KW - Thermal temperature distribution
UR - http://www.scopus.com/inward/record.url?scp=85210025011&partnerID=8YFLogxK
U2 - 10.1016/j.ijheatmasstransfer.2024.126485
DO - 10.1016/j.ijheatmasstransfer.2024.126485
M3 - 期刊論文
AN - SCOPUS:85210025011
SN - 0017-9310
VL - 238
JO - International Journal of Heat and Mass Transfer
JF - International Journal of Heat and Mass Transfer
M1 - 126485
ER -