TY - JOUR
T1 - Natural convection heat transfer in a nanofluid filled L-shaped enclosure with time-periodic temperature boundary and magnetic field
AU - Saleem, Khalid B.
AU - Marafie, Alia H.
AU - Al-Farhany, Khaled
AU - Hussam, Wisam K.
AU - Sheard, Gregory J.
N1 - Publisher Copyright:
© 2022 THE AUTHORS
PY - 2023/4/15
Y1 - 2023/4/15
N2 - The natural convective Cu-water nanofluid flow in L-shape cavity with an oscillating temperature profile is studied numerically. The cavity's lower horizontal and left vertical walls are heated sinusoidally with time about a high mean temperature (T¯H). In contrast, the cavity's right vertical wall and its nearby horizontal lower wall are kept cold at a temperature (Tc). The calculations have been performed over temperature oscillation amplitude (0≤A≤2), dimensionless temperature oscillation frequency 0≤f≤100, Rayleigh number (103≤Ra≤108), Hartmann number (0≤Ha≤100), the nanoparticles volume fraction (0≤ϕ≤0.2), and enclosure aspect ratios (0.2≤AR≤0.8). Outcomes reveal that with AR = 0.2, heat transfer happens considerably through conduction at Ra = 103 –105, while the time average Nusselt number (Nu¯) is independent of both Ha and Ra. Convection effects, on the other hand, become significant at high Ra. Additionally, as Ha ascends from 0 to 50, Nu¯ increases linearly with increasing ϕ, while it remains steady at Ha = 75 and 100.
AB - The natural convective Cu-water nanofluid flow in L-shape cavity with an oscillating temperature profile is studied numerically. The cavity's lower horizontal and left vertical walls are heated sinusoidally with time about a high mean temperature (T¯H). In contrast, the cavity's right vertical wall and its nearby horizontal lower wall are kept cold at a temperature (Tc). The calculations have been performed over temperature oscillation amplitude (0≤A≤2), dimensionless temperature oscillation frequency 0≤f≤100, Rayleigh number (103≤Ra≤108), Hartmann number (0≤Ha≤100), the nanoparticles volume fraction (0≤ϕ≤0.2), and enclosure aspect ratios (0.2≤AR≤0.8). Outcomes reveal that with AR = 0.2, heat transfer happens considerably through conduction at Ra = 103 –105, while the time average Nusselt number (Nu¯) is independent of both Ha and Ra. Convection effects, on the other hand, become significant at high Ra. Additionally, as Ha ascends from 0 to 50, Nu¯ increases linearly with increasing ϕ, while it remains steady at Ha = 75 and 100.
KW - L-Shaped cavity
KW - Magnetic field
KW - Nanofluid
KW - Oscillating temperature
UR - http://www.scopus.com/inward/record.url?scp=85145160116&partnerID=8YFLogxK
U2 - 10.1016/j.aej.2022.12.030
DO - 10.1016/j.aej.2022.12.030
M3 - Article
AN - SCOPUS:85145160116
SN - 1110-0168
VL - 69
SP - 177
EP - 191
JO - Alexandria Engineering Journal
JF - Alexandria Engineering Journal
ER -