REYNOLDS TRAINING SET
Reynolds applied this experiment to different cross-sections of the pipe and observed that the flow lines of the colored water remained intact at these sections, indicating that the flow moves along straight and parallel lines. When the fluid flow rate is increased, beyond a certain speed, the flow lines of the colored water disappear and the entire water mass becomes colored. In other words, at high flow speeds, the particles making up the water no longer move parallel along the pipe axis but also move radially within the pipe, resulting in complete mixing (i.e., turbulence). The fluid flow speed at which the flow changes from one type to another is called the "critical velocity." In subsequent experiments, Reynolds examined the conditions under which these two types of flow occur and found that the critical velocity depends on the pipe diameter, fluid flow rate, density, and absolute (dynamic) viscosity. He demonstrated that these four factors can be grouped in a certain way. The Reynolds number holds great importance in fluid mechanics and is widely used in engineering applications.
