TY - JOUR
T1 - The Nusselt number and the aerodynamic coefficients for prolate and cylindrical particles at low to moderate Reynolds number
AU - Lote, Dhiraj A.
AU - Yang, Xin
AU - Khalij, Mohammed
AU - Arcen, Boris
AU - Tanière, Anne
AU - Mao, Xuerui
N1 - Publisher Copyright:
© 2025 Elsevier B.V.
PY - 2025/10
Y1 - 2025/10
N2 - This work aims to improve existing models for the Nusselt number (Nu), drag coefficient (CD), lift coefficient (CL), and pitching torque coefficient (CT) in flow passing prolate and cylindrical particles by incorporating the effects of particle orientation. Three-dimensional cold flow around hot particles was performed to quantify Nu and aerodynamic coefficients at aspect ratios from 2 to 10, Reynolds number from 0.1 to 300, and orientation from 0°to 90°. The simulation results are validated by Nu, CD, CL, and CT of spherical and non-spherical particles in the literature. Based on the CFD data, a complete set of correlations for Nu, CD, CL, and CT is proposed, demonstrating good performance for the particles considered. Overall, Nu increases with Rep while CD decreases; both Nu and CD increase with incidence angle. The relative difference for Nu, CD, CL, and CT between prolate and cylindrical particles reduces as the aspect ratio increases.
AB - This work aims to improve existing models for the Nusselt number (Nu), drag coefficient (CD), lift coefficient (CL), and pitching torque coefficient (CT) in flow passing prolate and cylindrical particles by incorporating the effects of particle orientation. Three-dimensional cold flow around hot particles was performed to quantify Nu and aerodynamic coefficients at aspect ratios from 2 to 10, Reynolds number from 0.1 to 300, and orientation from 0°to 90°. The simulation results are validated by Nu, CD, CL, and CT of spherical and non-spherical particles in the literature. Based on the CFD data, a complete set of correlations for Nu, CD, CL, and CT is proposed, demonstrating good performance for the particles considered. Overall, Nu increases with Rep while CD decreases; both Nu and CD increase with incidence angle. The relative difference for Nu, CD, CL, and CT between prolate and cylindrical particles reduces as the aspect ratio increases.
KW - Drag coefficient
KW - Lift coefficient
KW - Non-spherical particle
KW - Nusselt number
KW - Pitching torque coefficient
UR - http://www.scopus.com/inward/record.url?scp=105007599731&partnerID=8YFLogxK
U2 - 10.1016/j.powtec.2025.121131
DO - 10.1016/j.powtec.2025.121131
M3 - Article
AN - SCOPUS:105007599731
SN - 0032-5910
VL - 464
JO - Powder Technology
JF - Powder Technology
M1 - 121131
ER -