Code Number: 2C20.34

Demo Title: Coanda Effect - Thread in an Air Stream

Condition: Excellent

Principle: Coanda Effect, Friction of a Moving Air Stream

Area of Study: Fluids

Equipment:

Train and Train Thread Toy.

Procedure:

Blow air through the train thread toy. This creates an air stream through the smoke stack where the thread is. The friction of the moving stream of air will entrain the string, moving it with the air stream. Note: The toy also has a whistle on it that needs to be plugged if the noise is undesirable.

References:

F. Lee Slick, "Projectile Motion on a Football Field", TPT, Vol. 21, #3, Mar. 1983, p. 198.

University of Maryland Physics Department QOTW Question #322

University of Maryland Physics Department QOTW Answer #322

2C20.34 - University of Maryland QOTW Question #322

2C20.34 - University of Maryland QOTW Answer #322

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Instructional Resources and Lecture Demonstrations

2C20.34 - Coanda Effect - Thread in an Air Stream

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