Marangoni Flowers and the Evil Eye: Overhead Presentations of Marangoni Flow

Donald W. Mundell
Department of Chemistry, Owensboro Community and Technical College, Owensboro, KY 42303
J. Chem. Educ., 2009, 86 (7), p 833
DOI: 10.1021/ed086p833
Publication Date (Web): July 1, 2009

Abstract

Intermolecular forces and surface tension gradients in solutions lead to remarkable flows, known as Marangoni flows, where liquid flows from a region of low surface tension towards higher surface tension. Details of these flows, not visible to the naked eye, are made visible on an overhead projector owing to variation in the index of refraction.

Keywords (Audience):

First-Year Undergraduate / General

Keywords (Domain):

Demonstrations

Keywords (Feature):

JCE DigiDemos: Tested Demonstrations

Keywords (Pedagogy):

Hands-On Learning / Manipulatives

Keywords (Subject):

Alcohols
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History

  • Received: August 03, 2009

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