TY - GEN
T1 - FLOW INTERFERENCE BETWEEN TANDEM CYLINDER WITH FORCED CONVECTION IN STAGGERED POSITION
AU - Sarout, Yuvraj
AU - Islam, Md
AU - Yap, Yit Fatt
AU - Janajreh, Isam
N1 - Publisher Copyright:
© 2023 by ASME.
PY - 2023
Y1 - 2023
N2 - Flow-induced vibration of the filleted (rounded corner) oscillating cylinder is numerically investigated at Re=150 and Pr=0.7. The upstream cylinder (UC) is static while the downstream cylinder (DC) is elastically mounted which is allowed to vibrate in the transverse direction with a spacing ratio (L/D) =5 and staggered angle (∝) of 45°. Square cylinder is gradually filleted into the circular cylinder by changing r* (filleted radius)=0 (square cylinder), 0.5, 0.75 and 1(circular cylinder). Computations were carried out for reduced mass m∗ = 10 and varying reduced velocity (Ur)= 2, 4, 6, 8 and 10, structural damping constant is set to be zero which gives rise to high vibrational amplitude. Both cylinders were maintained at a constant temperature (T∗ = 1) while the upcoming flow is set to be at T∗ = 0. Vibrational characteristics are scrutinized with help of frequency characteristics of vibrating cylinder, vibrational amplitude, drag coefficient, lift coefficient and instantaneous z-vorticity contours. When natural frequency (fn) and vortex shedding frequency (fs) overlap, it causes synchronization or lock-in. The lock-in phenomenon usually occurred at Ur = 6 leading to higher vibrational amplitude for all geometries and dropped at Ur = 8 but persisted at Ur = 8 and 10 for r*=0. Due to higher vibrational amplitude, the flow structure is more complicated at Ur ≥ 6. The maximum value of average Nusselt number (Nuavg) is at Ur = 6 for circular DC, whereas the minimum lies at Ur = 2 for square upstream cylinder. Generated results envisage results of flow interferences and forced convection of tube arrays in heat exchangers and marine structures. Understanding the mechanisms of flow-induced vibration in staggered cylinders is crucial for designing and optimizing these systems, as well as for ensuring their safe and reliable operation.
AB - Flow-induced vibration of the filleted (rounded corner) oscillating cylinder is numerically investigated at Re=150 and Pr=0.7. The upstream cylinder (UC) is static while the downstream cylinder (DC) is elastically mounted which is allowed to vibrate in the transverse direction with a spacing ratio (L/D) =5 and staggered angle (∝) of 45°. Square cylinder is gradually filleted into the circular cylinder by changing r* (filleted radius)=0 (square cylinder), 0.5, 0.75 and 1(circular cylinder). Computations were carried out for reduced mass m∗ = 10 and varying reduced velocity (Ur)= 2, 4, 6, 8 and 10, structural damping constant is set to be zero which gives rise to high vibrational amplitude. Both cylinders were maintained at a constant temperature (T∗ = 1) while the upcoming flow is set to be at T∗ = 0. Vibrational characteristics are scrutinized with help of frequency characteristics of vibrating cylinder, vibrational amplitude, drag coefficient, lift coefficient and instantaneous z-vorticity contours. When natural frequency (fn) and vortex shedding frequency (fs) overlap, it causes synchronization or lock-in. The lock-in phenomenon usually occurred at Ur = 6 leading to higher vibrational amplitude for all geometries and dropped at Ur = 8 but persisted at Ur = 8 and 10 for r*=0. Due to higher vibrational amplitude, the flow structure is more complicated at Ur ≥ 6. The maximum value of average Nusselt number (Nuavg) is at Ur = 6 for circular DC, whereas the minimum lies at Ur = 2 for square upstream cylinder. Generated results envisage results of flow interferences and forced convection of tube arrays in heat exchangers and marine structures. Understanding the mechanisms of flow-induced vibration in staggered cylinders is crucial for designing and optimizing these systems, as well as for ensuring their safe and reliable operation.
KW - FIV
KW - Flow interference
KW - Heated Cylinder
KW - Staggered Position
UR - http://www.scopus.com/inward/record.url?scp=85177563251&partnerID=8YFLogxK
U2 - 10.1115/HT2023-106964
DO - 10.1115/HT2023-106964
M3 - Conference contribution
AN - SCOPUS:85177563251
T3 - Proceedings of ASME 2023 Heat Transfer Summer Conference, HT 2023
BT - Proceedings of ASME 2023 Heat Transfer Summer Conference, HT 2023
PB - The American Society of Mechanical Engineers(ASME)
T2 - ASME 2023 Heat Transfer Summer Conference, HT 2023
Y2 - 10 July 2023 through 12 July 2023
ER -