Using CFD to derive reduced order models for heat transfer in particle curtains

Afshar, Sepideh, Sheehan, Madoc, and Fazlollahi, Amir (2015) Using CFD to derive reduced order models for heat transfer in particle curtains. Progress in Computational Fluid Dynamics, 15 (2). pp. 71-80.

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3–D Eulerian–Eulerian CFD is used to simulate convective heat transfer in free falling particle curtains. Total heat loss for curtaining particles is compared to heat loss for isolated single particles. Spherical silica particles with density of 2,634 kg/m³ at 400 K (200 µm, 400 µm and 600 µm) flow at approximately 0.041 kg/s to 0.2 kg/s through a narrow slot in a rectangular box (0.45 m × 0.9 m × 0.225 m) filled with ambient air. The slot sizes through which the particles enter the rectangular box were 10 to 80 mm wide. Modifying the slot size at 0.041 kg/s for 400 µm particles can lead to 13% increases in rates of convective heat transfer per unit mass. A reduced order model was developed to predict the centreline temperatures of particles in the falling curtains. The drag coefficient in the ROM was varied to suit a range of particle sizes and mass flow rates.

Item ID: 43537
Item Type: Article (Research - C1)
ISSN: 1741-5233
Keywords: particle; computational fluid dynamics; heat transfer; convection; Eularian-Eularian; reduced order model; curtain; residence time; drag; drying
Date Deposited: 05 Apr 2016 23:14
FoR Codes: 09 ENGINEERING > 0915 Interdisciplinary Engineering > 091503 Engineering Practice @ 33%
09 ENGINEERING > 0915 Interdisciplinary Engineering > 091599 Interdisciplinary Engineering not elsewhere classified @ 34%
09 ENGINEERING > 0915 Interdisciplinary Engineering > 091504 Fluidisation and Fluid Mechanics @ 33%
SEO Codes: 85 ENERGY > 8507 Energy Conservation and Efficiency > 850703 Industrial Energy Conservation and Efficiency @ 100%
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