This research delves into the complex dynamics of high-pressure, hot, and dynamic liquids flowing through piping systems. To better understand the various factors that affect the torsional vibration of these liquids, the study uses a coupled nonlinear partial differential equation to analyze generating variables such as fluid flow heat flux, mass ratio, pipe thickness, internal pressurization, vertical motion, longitudinal direction kinetic energy of the inner fluid, and crosssectional area change. The ANSYS CFD R2022a software is used to simulate the model, and a threedimensional model is used to investigate the dynamic behavior of the thin pipe. The numerical modal analysis is performed in the configuration of fluid-structure interaction, and the study also examines the vibratory behavior of the fluid-conveying pipe. The results indicate that the velocity was 7.5% lower in the pipe with plaque model than in the normal pipe model, while pressure and WSS were 94.9% and 74.41% higher, respectively. The study also conducts parametric studies on the effect of temperature, pressure drop, and velocity change on the frequencies. Additionally, the research suggests that a gas column input signal exists in the pipe, which can cause severe vibration when it comes into contact with unreasonable vibration. This study highlights the importance of determining the ideal design for pipes to restore their usual functions and avoid excessive vibration.”

Keywords : Exploration; K-ԑ model; ANSYS Computational Fluid Dynamic; CFX Code; Vibration.