Abstract
This paper presents a comprehensive Computational Fluid Dynamics (CFD) analysis of hydraulic shock absorbers, focusing on three configurations: single zone bypass damping, two zone bypass damping and three zone bypass damping systems during the compression stroke of a shock. Utilizing the ANSYS Fluent Solver, the study employs dynamic meshing to simulate transient flow conditions, allowing the mesh to adapt to the movement of the piston and fluid interfaces. This technique captures the development of flow patterns, pressure changes, and velocity fields associated with moving parts. The Single zone damper exhibited predictable pressure increases consistently with fluid compression principles. In contrast, the two zone bypass system displayed more complex dynamics, indicating effective pressure regulation as the piston approached the valve openings. The Three zone bypass configuration demonstrated superior fluid management capabilities, enhancing damping characteristics during rapid load changes. Velocity contours revealed significant turbulence patterns around the valves, emphasizing intricate interactions that influence damping efficiency. Force analysis indicated that while conventional trends were observed, the Three zone bypass system allowed for optimized damping forces at critical piston positions, contributing to improved vehicle stability and passenger comfort. The findings underscore the advantages of advanced design features in hydraulic shock absorbers and highlight the role of dynamic meshing in enhancing simulation accuracy, paving the way for future research on design optimizations and performance evaluations across diverse operational scenarios.