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Title: Making smoke rings

Description: Giving an impulse to a smoke laden gas creates a vortex that appears as a ring of smoke. Air in the center of the hole travels straight out but the air near the bend creates a vena contracta that cause the vortex.

Credits: Chris Rogers, Rich Wlezien, Erich Tisch, NSF


Web Page:

Contributed By: Erich Tisch

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