ABSTRACT
This chapter aims to provide the need for experimental study and to gain insight concerning various applications of the available techniques for experimental study of fluid flows. A large variety of measurement techniques are used in the field of experimental fluid mechanics. Wind tunnels are used for numerous investigations ranging from fundamental research to industrial aerodynamics. In an experimental investigation, an experimenter must have a clear idea about the experimental technique and the measurement system used. Basically, the main components of a measuring system may be classified into the following three categories: the sensing element, the signal converter, and the display. The display is that the information from the sensing element, which is converted into a desired form by the signal converter, is read by the experimenter. Some of the popularly employed flow visualization methods for fluid flow analysis are flow visualization with smoke, tuft, chemical coating, interferometer, schlieren, and shadowgraph.
