Flow Characteristics Inside a Circular Cylinder Under Vibrating and Rotating Conditions*

Understanding the flow characteristics inside rotating structures is crucial not only for analyzing natural phenomena such as tornadoes and water circulations in oceans but also for modeling flow-induced vibrations generated within complex structures under vibrating conditions. This study aims to observe the flow characteristics, including velocity and pressure, under varying rotational and vibrational conditions over time in a closed cylindrical structures. To achieve this, we assumed various rotational and vibrational conditions and modeled the resulting flow characteristics using several computational fluid dynamics (CFD) techniques. Subsequently, we analyzed the changes in flow velocity and pressure within the cylindrical structures to understand the effect of vibration and rotational conditions. Based on these results, we modeled the flow-induced noise occurring within the cylindrical structures and proposed optimization directions to minimize the vibrations.