A pressure gradient refers to the change in pressure between two points in a fluid system. In the field of fluid dynamics, pressure gradients play a crucial role in determining the flow of fluids, such as air or water, through a given system. Pressure gradients are used to describe the forces that drive fluid flow, with higher pressure at one point causing fluid to move towards a lower pressure point. Understanding and analyzing pressure gradients is essential in various fields, including meteorology, hydrology, and engineering, to predict and control fluid flow patterns. Researchers in this area often study how pressure gradients affect the movement of fluids and the associated implications for various applications.