Flow Studies using custom Schlieren Setup - Heat flow from an Iron

The following set of videos are studies are done for the visualization of "flow" using custom Schlieren setup with different materials.

We used iron as our main source of heat and a house model made of wood. The materials were used as one of the faces of the house and flow was observed in each case before and after opening this component.
Our Custom Schlieren method was made by a set of magnifiers, point source of light and a DSL-R camera.