THERMAL SCIENCE

International Scientific Journal

Thermal Science - Online First

Jiawen Hou

,

Dongdong Wang

,

Fan Li

,

Hongxia Zhao

,

Jiangtao Zhang

,

Lijie Jin

,

Chu-An Zhang

,

Dening Xiang

,

Ya-Nan Chen

,

Xuehong Wu

online first only

Study on heat and mass transfer characteristics in drying process of drum dryer based on the DEM-CFD coupled method

ABSTRACT
In order to analyze the heat and mass transfer characteristics of cut tobacco in a horizontal drum dryer, the discrete element method (DEM) was used to calculate the particle collision model and DEM-CFD coupled heat transfer model. With the increase of the rotating speed, the mixing degree gradually increases, and when the rotating speed is 16 rpm, the mixing degree is higher. When the heat flux of EDEM-CFD coupling is 0.2 W-1W, the particle temperature will gradually increase and tend to a fixed value. The residence time of the material has a great influence on the drying quality of the material particles. If the residence time is too short, the heat of the material will be uneven, and if the residence time of the material is too long, the damage of the material particles will increase, increased crushing rate.
KEYWORDS
DEM-CFD coupling, heat and mass transfer, cut tobacco, drum dryer
PAPER SUBMITTED: 2024-04-19
PAPER REVISED: 2024-06-25
PAPER ACCEPTED: 2024-06-27
PUBLISHED ONLINE: 2024-08-18
DOI REFERENCE: https://doi.org/10.2298/TSCI240419177H
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Study on heat and mass transfer characteristics in drying process of drum dryer based on the DEM-CFD coupled method