Boundary layers refer to the thin layer of fluid adjacent to a solid surface in which the velocity of the fluid changes from zero at the surface to the free stream velocity away from the surface. In fluid dynamics, boundary layers play a significant role in determining the behavior of flow around objects and surfaces. The study of boundary layers involves understanding the complex interactions between the fluid flow and the solid surface, and how these interactions affect the overall flow field. Research in boundary layers encompasses a wide range of topics, including boundary layer separation, transition, turbulence, and drag reduction strategies. Understanding and controlling boundary layers is important in various engineering applications, such as aircraft and automobile design, wind energy generation, and naval architecture.