Food and Fermentation Industries >

2026 , Vol. 52 >Issue 10: 230 - 237

DOI: https://doi.org/10.13995/j.cnki.11-1802/ts.043358

Simulation study of heat drying shrinkage process of corn grain piles

  • ZHAO Pingqi ,
  • WANG Xiaowan ,
  • ZHU Xiaoyue ,
  • CHEN Pengxiao ,
  • ZHU Guangfei ,
  • LYU Jiale ,
  • XING Yanjia ,
  • WEN Yunshou
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  • 1(School of Food and Strategic Reserves, Henan University of Technology, Zhengzhou 450001, China)
    2(Academy of Agricultural Planning and Engineering, Beijing 100125, China)
    3(Henan Zhongke Intelligent Equipment Co. Ltd.,Anyang 456400, China)

Received date: 2025-05-21

  Revised date: 2025-10-21

  Online published: 2026-06-15

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Abstract

The hygrothermal heat transfer contraction model of hot-air drying of corn grain heap was established by using Simcenter STAR-CCM+ software with the flow-solid coupling method.Through numerical simulation, the heat and mass transfer characteristics of the corn grain heap and the volume contraction generated during the drying process were investigated, and the changes and migration of corn moisture during the hot air drying process were verified by using low field nuclear magnetic resonance (LF-NMR) and magnetic resonance imaging (MRI).Results showed that the model could better reflect the changing rules of moisture heat transfer and volume shrinkage in the drying process of the grain pile.The temperature of the grain heap in the drying process started to rise from the bottom, and the moisture loss started from the bottom. The contraction of corn in the drying process was divided into two stages, including rapid contraction in the early stage and slower contraction in the late stage, and the volume ratio of corn at the end of drying was about 88%.In the drying process, the free water in the corn was gradually converted into bound water, and it was not easy to flow the largest proportion of water loss.

Key words： hot air drying; simulation; corn; shrinkage; moisture heat transfer

Cite this article

ZHAO Pingqi , WANG Xiaowan , ZHU Xiaoyue , CHEN Pengxiao , ZHU Guangfei , LYU Jiale , XING Yanjia , WEN Yunshou . Simulation study of heat drying shrinkage process of corn grain piles[J]. Food and Fermentation Industries, 2026 , 52(10) : 230 -237 . DOI: 10.13995/j.cnki.11-1802/ts.043358

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