Fish-Inspired Hydrodynamic Study of Stationary, Undulating, and Oscillating Hydrofoils

A fish-inspired research, on flow across a hydrofoil that is stationary or mimicking various types of fish-inspired swimming, can reveal efficient flow mechanisms that can lead to a novel design and development of autonomous underwater vehicles (AUVs) or energy extraction devices. The present thesis starts with various flow transitions in the wake of a stationary hydrofoil using two-dimensional simulations, water channel-based experiments, and Floquet stability analysis. Thereafter, using a level set function and immersed interface method-based in-house code, four different numerical studies on flow across various types of fish-inspired undulating and oscillating hydrofoils are presented.