- 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. 
 
             
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