On Dynamic and Heat Transfer Characteristics of Elastically Mounted Heated Circular Cylinder Undergoing VIV

Numerical investigations are carried out in flow past spring mounted heated circular cylinder undergoing vortex-induced vibrations. The computations are performed using Open Source Field Operations and Manipulation (OpenFoam). The existing solver has been modified to include thermal effects of the circular cylinder. Two degrees of freedom, i.e., the transverse and streamwise oscillations of the cylinder, are considered in the present study. The computations are carried out assuming a negligible damping ratio at Re values of 150 and 200. Wake characteristics are examined for different values of reduced velocity (Ur) varying from 3 to 8. The effect of Ur on cylinder displacement, lock-in behaviour, and frequency ratio is disclosed for the heated cylinder. Unsteady flow and thermal characteristics of the wake are illustrated using vorticity and temperature contours. The variation in the average value of Nusselt number around the cylinder has been plotted for different values of reduced velocity. Force coefficients on the cylinder surface are also reported for varying Ur.