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<p>The coupling effect between mixing uniformity and heat transfer of particles in the double barrel with differential velocity (DBDV) was studied. The particle motion model, heat transfer model and their coupled processes were established. The velocity and temperature fields of particles and fluids and the coupling relationship were analyzed. The results indicate that the particle flow direction in the mixing zone is opposite to the fluid flow direction. The velocity and temperature of the fluid are low where particles exist. The velocity and temperature of the fluid closer to the outlet are higher in the mixing zone. The dispersion coefficient decreases with increasing temperature at low and high linear velocities. The dispersion coefficient generally increases with the increase of temperature at medium linear velocity. It is advisable to choose the medium linear velocity to obtain particles with high uniformity and high temperature. This provides theoretical guidance for the development of DBDV.</p>

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Coupling effect between mixing uniformity and heat transfer of particles in a double barrel with differential velocity based on CFD-DEM

  • 期刊论文

  • 发表日期：

    2025年4月23日

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  • Lingying Zhao,
  • Min Ye,
  • Jinning Zhi,
  • Yafeng Ren,
  • Hairong Gu

摘要

The coupling effect between mixing uniformity and heat transfer of particles in the double barrel with differential velocity (DBDV) was studied. The particle motion model, heat transfer model and their coupled processes were established. The velocity and temperature fields of particles and fluids and the coupling relationship were analyzed. The results indicate that the particle flow direction in the mixing zone is opposite to the fluid flow direction. The velocity and temperature of the fluid are low where particles exist. The velocity and temperature of the fluid closer to the outlet are higher in the mixing zone. The dispersion coefficient decreases with increasing temperature at low and high linear velocities. The dispersion coefficient generally increases with the increase of temperature at medium linear velocity. It is advisable to choose the medium linear velocity to obtain particles with high uniformity and high temperature. This provides theoretical guidance for the development of DBDV.