FLOW and HEAT TRANSFER CHARACTERISTICS in ARRAYS of STATIONARY and ELASTICALLY SUPPORTED CYLINDERS

This study investigates FIV and heat transfer in arrays of stationary and elastically supported cylinders by considering nine heated circular cylinders with inline arrangements. A 2-D numerical simulations considering low Reynolds number and forced convection heat transfer are carried out using ANSYS Fluent loaded with user-defined function (UDF). User-defined function (UDF) governs cylinders' displacements in y-directions for elastically supported cylinders. Several parameters are considered, including a reduced velocity range of 2-12, a fixed centre-To-centre distance between cylinders of 3D in both direction i.e.Transverse and streamwise, a Reynolds number of 100, a Prandtl number of 0.7, and a constant mass ratio of 2. The heat transfer performance is investigated in elastically supported cylinders and then results are compared with arrays of stationary cylinders to understand the significance of FIV. The results of this study indicate that the flow pattern for arrays of elastically supported cylinders depends on the reduced velocity, and it is different from that of arrays of stationary cylinders. At lower reduced velocities, it follows the almost same flow pattern as stationary cylinders. Additionally, it is observed that FIV in elastically supported cylinders shows a significant improvement in the average Nusselt number up to 39% for arrays of elastically supported cylinders when compared with arrays of stationary cylinders.