Experimental Study on the Dynamic Angles of Repose of Non-Fully Filled Phase Change Particles in a Rotating Drum

LI Jiapeng; QI Xiaoni; QU Xiaohang

doi:10.21656/1000-0887.450202

Volume 46 Issue 7

Jul. 2025

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Article Navigation > Applied Mathematics and Mechanics > 2025 > 46(7): 882-892

LI Jiapeng, QI Xiaoni, QU Xiaohang. Experimental Study on the Dynamic Angles of Repose of Non-Fully Filled Phase Change Particles in a Rotating Drum[J]. Applied Mathematics and Mechanics, 2025, 46(7): 882-892. doi: 10.21656/1000-0887.450202

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Experimental Study on the Dynamic Angles of Repose of Non-Fully Filled Phase Change Particles in a Rotating Drum

doi: 10.21656/1000-0887.450202

School of Transportation and Vehicle Engineering, Shandong University of Technology, Zibo, Shandong 255000, P.R.China

Received Date: 2024-07-10
Rev Recd Date: 2024-09-20

Available Online: 2025-07-30

Publish Date: 2025-07-01

Abstract

Abstract

Spherical particles non-filled with water as the phase change material were fabricated. A rotating drum experimental setup was built. the influences of the motion of the phase interface inside the particles on the dynamic angles of repose of the particles in the rotating drum were investigated with varying particle diameters, volume fractions of the phase change material inside the particles, filling ratios of the rotating drum, and rotation speeds. The dynamic angle of repose was obtained through image capture and the MATLAB image processing. The results indicate that, the motion of the phase interface can cause some particles to slip, enhancing particle flowability and resulting in a fluctuating change in the resting angle with an increasing rotational speed. As the volume fraction increases, the flowability of the particles will improve, and the resting angle will decrease, while the effect of the rotational speed on the particles will gradually diminish. Furthermore, as the filling rate decreases and the particle size increases, the dynamic resting angle of the particle bed layer will decrease, the particle flow capacity will heighten, and the particle bed layer will be more susceptible to the phase interface motion.
- dynamic angle of repose,
- non-fully filled particle,
- volume fraction,
- phase interface

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References(29)

References

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