Effects of flow-induced vibration on forced convection heat transfer from two tandem circular cylinders in laminar flow. (1st April 2021)

• Record Type: Journal Article
• Authors: Sun, Xu; Li, Shuai; Lin, Gang-Gui; Zhang, Jia-Zhong
• Is Part Of: International journal of mechanical sciences. Volume 195(2021)
• Publication Date: 2021-04-01
• Subjects: Flow-induced vibration -- Circular cylinder -- Convection heat transfer -- Numerical simulation -- Fluid-structure interaction; Mechanical engineering -- Periodicals; Génie mécanique -- Périodiques; Mechanical engineering; Maschinenbau; Mechanik; Zeitschrift; Periodicals; 621.05
• DOI: 10.1016/j.ijmecsci.2020.106238
• Languages: English
• ISSNs: 0020-7403

Abstract

Highlights: An accurate and stable fluid-structure interaction scheme concerning heat transfer process is proposed for forced convection heat transfers from cylindrical structures under flow-induced vibration. Coupling mechanisms among the flow patterns, cylinder vibrations and heat transfer features of an isolated circular cylinder and two tandem circular cylinders in laminar flow regime are analyzed. For an isolated circular cylinder, large-scale vortex-induced vibration appearing in the "lock-in" regime increases the mean Nusselt number of the cylinder by up to 15%. For two tandem circular cylinders, wake interference amplifies the flow-induced vibration of the downstream cylinder by up to 81.32%, leading to a maximum heat transfer amplification of 28.3%. Abstract: Flow-induced vibrations (FIVs) and forced convection heat transfers of two tandem circular cylinders in laminar flow with Re =150 and Pr =0.7 are investigated using fluid-structure interaction (FSI) simulation. The cylinder is heated, elastically supported and only allowed to vibrate in the transverse direction, with the mass ratio, damping ratio, centre-to-centre distance fixed respectively at m *=2, ζ =0, L / D =4 and the reduced velocity varied in U r =1~20. The two-dimensional incompressible Navier-Stokes equations and energy equation are coupled with the vibrating equation of the spring-mass-damper model to describe FIV of two tandem cylinders involving forced convection heat transfer process. An FSI solver is proposed by combing the modified characteristic-based split scheme, dual-time stepping method, segment spring analogy method and loosely coupled partitioned approach, the accuracy and stability of which are validated using two benchmark models including the forced convection heat transfer from a fixed circular cylinder and FIV of an elastically supported circular cylinder. Using FSI simulation, characteristics of FIVs and their effects on forced convection heat transfers of two tandem circular cylinders are analyzed in detail. The obtained numerical results are insightful to the understanding of the heat transfer features of a group of cylindrical structures under FIVs, such as the tube bundles in heat exchangers and power plants, fuel rod bundles in nuclear reactors and riser system in offshore oil and gas platforms. Graphical abstract: Image, graphical abstract