| Beschreibung |
Schlieren imaging system is a flow visualizing technique. It is used to visualize density variation in transparent media. Schlieren imaging capitalizes the refraction of light. It makes small density gradients (e.g. weak gradients of refractive index found in indoor air) visible. For this project, the schlieren imaging system at the Department of Building Physics will be used. The setup consists of four elements, (1) single concave spherical mirror, (2) LED light source, (3) knife-edge and (4) a digital camera. The setup will be used to capture schlieren images. Large time-sequence of these images would be analyzed using digital cross-correlation algorithm to quantify the velocity, temperature, density gradient, refractive index, etc. of the test object. |
