| 
                Water tank 
                        
                            | External diameter : | 15cm |  
                            | Internal diameter : | 7cm |  The cooling element for the inner side was
                    an aluminum rod. A beaker was cutted and used
                    for the outer wall of the working fluid.
                    Acrylic board was used for the outermost
                    wall, which was made a square shape to avoid
                    light refraction. Working fluid water  Visualization Liquid
                    crystal capsules were dispersed in the
                    water for visualization.Two slit light sources were used to avoid
                    casting a shadow from the aluminum rod.
 Experiment Process The aluminum rod in the center was directly
                    cooled by the
                    thermo-module, and the water in the outer
                    area was heated with a heating element, and
                    stirred using a pump.  |   |