Rotational Banding

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 Code Number :   8A20.27

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Reprinted by permission of Dick Berg, University of Maryland, for use on this website.

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Condition :   Good  
Principle :   Atmospheric and Gaseous Densities  
Area of Study :  Astronomy   
Equipment :   Large 24 Liter Plexiglass globe on lazy susan, 2-Liter round bottle flask containing Rheoscopic, Plexiglas stand and adaptor for air table, Rotating Air Table.

Procedure :   The large globe is permanently attached to the lazy susan and can be used "as is".  However, smoother operation can be had by centering the whole unit on the rotating air table.

Place the adaptor, Plexiglas stand, and the Pyrex stand on the air table.  Rotational banding should become apparent when the air table is set in motion.

Rheoscopic fluid is the choice when it comes to making the flow patterns stand out.  Hand soap that has glycerol stearate in it will also show nice flow patterns when mixed with water.   Glycerol distearate does not work as well.

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Mail Questions and Comments to:  Dale Stille