Vortex formation in the wake behind various surface-piercing cylinder configurations

The offshore structures were developed with the growth of discovering world resources in the oceans. The vortex formation in the wake of the various cylinder cross-section configurations requires more illustration. The purpose of this study is to analyze the multiphase flow effects over the different cylindrical structures using numerical simulations. The computational calculations were performed using a validated numerical model. The cylinder configurations were circular, streamlined foil, elliptical, and merged foils in the vertical position. The results of flow over cylinders were compared at different flow Fr up to 4 at calm water conditions. The examined flow was compared for the separation characteristics and the wake development behind the cylinders. The results demonstrated that the modification of the traditional circular cylinder produces different flow wake characteristics. In addition, the free surface significantly alternated the generated flow, especially with a low vertical submerged depth. These findings have significant implications for understanding the flow physics underwater and developing offshore applications. Offshore applications range from small-scale cylinders like cables to massive structures such as offshore platforms.