TY - JOUR ID - 15620 TI - Investigation of Nanofluid Natural Convection Heat Transfer in ‎Open Ended L-shaped Cavities utilizing LBM JO - Journal of Applied and Computational Mechanics JA - JACM LA - en SN - AU - Mohammadifar, Hasan AU - Sajjadi, Hasan AU - Rahnama, Mohammadi AU - Jafari, Saeed AU - Wang, Yan AD - Department of Mechanical Engineering, Shahid Bahonar University of Kerman, Kerman, P.O. Box 76175-133, Iran‎ AD - Department of Mechanical Engineering, University of Bojnord, Bojnord, P.C. 945 3155111, Iran AD - Department of Mechanical Engineering, Shahid Bahonar University of Kerman, Kerman, P.O. Box 76175-133, Iran AD - Department of Aerodynamics, Nanjing University of Aeronautics and Astronautics, Nanjing, China Y1 - 2021 PY - 2021 VL - 7 IS - 4 SP - 2064 EP - 2083 KW - Lattice Boltzmann method KW - Natural convection KW - Nanofluid KW - Open-ended L-shaped cavity KW - Aspect ratio DO - 10.22055/jacm.2020.33495.2235 N2 - In this paper, laminar natural convection of copper/water nanofluid in an open-ended L-shaped cavity is investigated by Lattice Boltzmann Model (LBM). The results are compared by previous studies that are in good agreement. Influences of Rayleigh number (Ra = 103, 104, 105, 106), cavity aspect ratio (AR = 0.2, 0.4, 0.6) and volume concentration of Cu nanoparticles (0 ≤ Φ ≤ 0.1) on the momentum, thermal fields and heat transfer in the enclosure are studied. Also, the effect of changing the boundary conditions, on the heat transfer rate has been investigated. It is observed that maximum heat transfer enhancement by adding the nanoparticles for Ra = 106 with AR = 0.4 (32.76%) occurs. Results illustrate that increasing the cavity aspect ratio decreases heat transfer rate for Ra = 103 and Ra = 104. The least and most heat transfer rate for Ra = 105 occurs in enclosures by aspect ratios of 0.2 and 0.4 respectively, while it was observed at Ra = 106 for minimum and maximum rate of heat transfer the opposite behavior that at Ra = 105 occurs. UR - https://jacm.scu.ac.ir/article_15620.html L1 - https://jacm.scu.ac.ir/article_15620_a20754c609932e2c75cf10fd9b4ee81c.pdf ER -