Perpustakaan Digital ITB

Flow over multiple cylinders is a complex oscillating phenomena that depends on arrangement, distance between cylinders, and Reynolds number. The phenomena is studied because it has a lot of engineering application such as in vortex-induced vibration (VIV). In this undergraduate thesis, the author will study the flow phenomena of 2 arrangement cases: flow over 2 cylinders in tandem and flow over 2 cylinders side-by-side. Lattice Boltzmann Method (LBM) will be used to numerically simulate the flow. The cases will be done on Reynolds number 100 and 200 with distance between 2 cylinders of 1.5D, 2D, and 3D. CD, CL, and St parameter trends are analysed and compared to various references. The results are in good agreement with references except for one case on tandem arrangement. Analysis on flow pattern is done with flow regime classification by Igarashi/Zdravkovich (tandem) and Kang (side-by-side). The flow regime results are good enough when compared to limited available reference.