Flow paths refer to the routes that a fluid (such as water or air) takes as it moves through a system or environment. In research, flow paths are often studied to understand how fluids interact with different materials, structures, or obstacles, and how they may be affected by factors such as pressure, temperature, and velocity. By mapping out flow paths, researchers can gain insights into how fluids behave in various scenarios, which can be useful for optimizing processes, predicting outcomes, or designing systems for better efficiency and performance.