Pipe flow refers to the movement of fluids through pipes, which can be liquids or gases. This flow is influenced by factors such as pipe diameter, length, and the fluid's viscosity. Understanding pipe flow is essential in various applications, including plumbing, irrigation, and industrial processes. The study of pipe flow often involves concepts like Bernoulli's principle and Darcy-Weisbach equation, which help predict how fluids behave under different conditions. Engineers use these principles to design efficient piping systems that minimize energy loss and ensure safe transport of materials.