Perpustakaan Digital ITB

This research employs numerical fluid-structure interaction (FSI) modeling using numerical commercial software to analyze the thrust performance of caudal fins. The study begins with modeling and validating a 3D FSI model against existing experimental data. Subsequently, an analysis is conducted to determine the most suitable 2D plane model (plane strain or plane stress). Parametric study are conducted by varying flapping frequency, freestream velocity, and material stiffness. Results demonstrate successful validation of the 3D FSI model against experimental data. The 2D plane strain model is slightly favored for its computational efficiency and possesses better accuracy compared to plane stress. Key conclusions highlight the dependence of net thrust on flapping frequency relative to natural frequency, where the highest net thrust generation are located in the region near the natural frequency of the system, the influence of material properties on thrust location, and the impact of freestream velocity, where an increase in freestream velocity will increase the net thrust generation in stiffer materials, and decrease the thrust generation in less stiff material with an addition of the shift of peak thrust location.