TY - JOUR
T1 - Flow-induced vibration and heat transfer in arrays of cylinders: Effects of transverse spacing and cylinder diameter
T2 - International Communications in Heat and Mass Transfer
AU - Islam, M.
AU - Kumar, S.
AU - Fatt, Y.Y.
AU - Janajreh, I.
N1 - Export Date: 11 January 2024; Cited By: 0; Correspondence Address: S. Kumar; Department of Mechanical Engineering, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates; email: [email protected]; CODEN: IHMTD
PY - 2023
Y1 - 2023
N2 - This two-dimensional numerical study investigates flow-induced vibration (FIV) and heat transfer in 3 × 3 arrays of nine heated circular cylinders of equal and unequal diameter configurations at a constant Re = 100. Six out of the nine cylinders are stationary, while three are elastically supported in the vertical direction. The computations are carried out using the commercial software ANSYS Fluent loaded with user-defined function (UDF). The effects of transverse spacing ratio (G* = 2, 3, and 4), diameter (D) and reduced velocity (2 ≤ Ur ≤ 20) on time histories of cylinder displacements, vorticity contours, oscillation amplitudes, mean pressure coefficient and Nusselt number (Nu) are investigated by considering forced convection heat transfer. Results show that lower oscillation amplitudes of elastically supported cylinders are noticed in arrays of cylinders when all cylinders are placed closely, i.e., at G* = 2. Furthermore, as G* increases, the oscillation amplitudes also increase due to the formation of vortex shedding. A better heat transfer performance is observed for arrays of cylinders with varying diameters at G* = 2 compared to those with the same diameter. For G* = 4, arrays of cylinders with the same diameter possess better heat transfer for all Ur. FIVs affect the Nu of elastically supported cylinders as well as stationary cylinders. © 2023 Elsevier Ltd
AB - This two-dimensional numerical study investigates flow-induced vibration (FIV) and heat transfer in 3 × 3 arrays of nine heated circular cylinders of equal and unequal diameter configurations at a constant Re = 100. Six out of the nine cylinders are stationary, while three are elastically supported in the vertical direction. The computations are carried out using the commercial software ANSYS Fluent loaded with user-defined function (UDF). The effects of transverse spacing ratio (G* = 2, 3, and 4), diameter (D) and reduced velocity (2 ≤ Ur ≤ 20) on time histories of cylinder displacements, vorticity contours, oscillation amplitudes, mean pressure coefficient and Nusselt number (Nu) are investigated by considering forced convection heat transfer. Results show that lower oscillation amplitudes of elastically supported cylinders are noticed in arrays of cylinders when all cylinders are placed closely, i.e., at G* = 2. Furthermore, as G* increases, the oscillation amplitudes also increase due to the formation of vortex shedding. A better heat transfer performance is observed for arrays of cylinders with varying diameters at G* = 2 compared to those with the same diameter. For G* = 4, arrays of cylinders with the same diameter possess better heat transfer for all Ur. FIVs affect the Nu of elastically supported cylinders as well as stationary cylinders. © 2023 Elsevier Ltd
KW - Flow-induced vibration
KW - Forced convection
KW - Nusselt number
KW - Pressure coefficient
KW - Two-dimensional flow
KW - Vortex shedding
KW - Circular cylinders
KW - Oscillating cylinders
KW - Oscillating flow
KW - Vibrations (mechanical)
KW - Vortex flow
KW - Array of cylinders
KW - Commercial software
KW - Cylinder diameters
KW - Oscillation amplitude
KW - Pressure coefficients
KW - Two-dimensional
KW - Vertical direction
KW - Vortex-shedding
U2 - 10.1016/j.icheatmasstransfer.2023.107159
DO - 10.1016/j.icheatmasstransfer.2023.107159
M3 - Article
SN - 0735-1933
VL - 149
JO - Int. Commun. Heat Mass Transf.
JF - Int. Commun. Heat Mass Transf.
ER -