<p>This study focuses on the effects of lateral and angular eccentricity on short annular seals in centrifugal pumps. A plain annular seal with a rotor diameter of 76.29 mm, a length of 34.93 mm, and a length-to-diameter (L/D) ratio of 0.45, was selected as a baseline model. This type of seal is commonly used as a wear ring in centrifugal pumps. A transient three-dimensional (3D) computational fluid dynamics (CFD) analysis was conducted using commercial software with mesh deformation to predict fluid reaction forces, leakage flow rates, and rotordynamic coefficients. The numerical results are provided, and the differences between lateral and angular eccentricity effects on seal performance are discussed. The lateral eccentric seals exhibited higher leakage flow rates and increased damping coefficients, improving system stability. In contrast, angular eccentricity reduced direct stiffness and damping, increasing system instability.</p>