TY - GEN

T1 - EFFECTS OF CORNER RADII ON VORTEX-INDUCED VIBRATION WITH FORCED CONVECTION HEAT TRANSFER FROM ANGLED TANDEM-CYLINDER AT LOW RE

AU - Sarout, Yuvraj

AU - Islam, Md

AU - Janajreh, Isam

N1 - Funding Information:
This research is sponsored by Khalifa University of Science and Technology (Grant CIRA-2020-057).
Publisher Copyright:
Copyright © 2022 by ASME.

PY - 2022

Y1 - 2022

N2 - Flow-induced vibration (FIV) of the modified tandem-cylinder with a change in corner radii has been investigated in a laminar flow regime with Re=150 and Pr=0.7. The corner radius (r: corner radii, R: cylinder characteristic length) r*=0,0.5,0.75 and 1 are used at a constant angle of attack of 45°. The cylinders are allowed to vibrate in transverse direction while restricted in axial direction with spacing ratio L/D = 4. Computation is carried out with a fixed mass ratio m* = 10 and varying reduced velocity Ur = 2 ~ 10. Constant heating is provided by keeping boundary at a constant temperature. The two-dimensional incompressible Navier-Stokes equations and energy equation are coupled together. Navier-Stokes equations are used with FIV equation of elastically supported cylinder to have flow solutions. Lock-in phenomenon for most of the configuration is occurring at Ur = 6 where vibrational amplitude for most of the configuration is peaked. At Ur =6 for square cylinder, pseudo '2P'can be observed in the wake of r*=0. Vortices at Ur =6 are not merged properly to form a definite type of vortex shedding, although in further downstream weak 2S vortex shedding can be observed. Heating of cylinder is affected by various parameters such as corner radii and spacing ratio with other factors such as early flow separation, reattachment, and vibrational amplitude. Maximum values of Average Nusselt number Nuavg is at Ur = 6 for circular cylinder, whereas minimum lies at Ur = 2 for square downstream cylinder. Results give a deep insight into heat transfer getting changed by changing different parameters and will make a base for future study of tube bundles in heat exchangers with FIV.

AB - Flow-induced vibration (FIV) of the modified tandem-cylinder with a change in corner radii has been investigated in a laminar flow regime with Re=150 and Pr=0.7. The corner radius (r: corner radii, R: cylinder characteristic length) r*=0,0.5,0.75 and 1 are used at a constant angle of attack of 45°. The cylinders are allowed to vibrate in transverse direction while restricted in axial direction with spacing ratio L/D = 4. Computation is carried out with a fixed mass ratio m* = 10 and varying reduced velocity Ur = 2 ~ 10. Constant heating is provided by keeping boundary at a constant temperature. The two-dimensional incompressible Navier-Stokes equations and energy equation are coupled together. Navier-Stokes equations are used with FIV equation of elastically supported cylinder to have flow solutions. Lock-in phenomenon for most of the configuration is occurring at Ur = 6 where vibrational amplitude for most of the configuration is peaked. At Ur =6 for square cylinder, pseudo '2P'can be observed in the wake of r*=0. Vortices at Ur =6 are not merged properly to form a definite type of vortex shedding, although in further downstream weak 2S vortex shedding can be observed. Heating of cylinder is affected by various parameters such as corner radii and spacing ratio with other factors such as early flow separation, reattachment, and vibrational amplitude. Maximum values of Average Nusselt number Nuavg is at Ur = 6 for circular cylinder, whereas minimum lies at Ur = 2 for square downstream cylinder. Results give a deep insight into heat transfer getting changed by changing different parameters and will make a base for future study of tube bundles in heat exchangers with FIV.

KW - Finite element method

KW - FIV

KW - Flow over cylinder

KW - Heat exchangers

KW - Heat transfer

KW - Unsteady flows

UR - http://www.scopus.com/inward/record.url?scp=85148326426&partnerID=8YFLogxK

U2 - 10.1115/IMECE2022-94978

DO - 10.1115/IMECE2022-94978

M3 - Conference contribution

AN - SCOPUS:85148326426

T3 - ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)

BT - Dynamics, Vibration, and Control

T2 - ASME 2022 International Mechanical Engineering Congress and Exposition, IMECE 2022

Y2 - 30 October 2022 through 3 November 2022

ER -