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Cheerios effect
In fluid mechanics, the Cheerios effect is the phenomenon that occurs when floating objects that don't normally float attract one another. Wettable, an example of the "Cheerios effect," is when breakfast cereal clumps together or clings to the sides of a bowl of milk. It is named after the common breakfast cereal Cheerios and is due to surface tension. The same effect governs the behavior of bubbles on the surface of soft drinks.〔(【引用サイトリンク】 title=Scientists explain the 'Cheerio Effect' )〕
==Description==
This clumping behavior applies to any small macroscopic object that floats or clings to the surface of a liquid. Examples of such objects are hair particles in shaving cream and fizzy beer bubbles. The effect is not noticeable in boats and other large floating objects because the force of surface tension is relatively small at that scale. (The Casimir effect, with a similar result, occurs at a nanoscopic scale, boats and other large floating objects in a choppy sea are subject to its classical equivalent. Both are caused by waves, not surface tension.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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