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Type: Journal article
Title: Flowing Windowpanes: Fact or Fiction?
Author: Stokes, Y.
Citation: Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 1999; 455(1987):2751-2756
Publisher: ROYAL SOC
Issue Date: 1999
ISSN: 1364-5021
Abstract: Glass has properties of a liquid. But do glass windows really flow over centuries, becoming thicker at the bottom, as is commonly reported? Simple calculations show that the time t taken for a windowpane of height LQ to increase in thickness by q% due to gravity g is given by t= 4μ/pgL0 q/100 where the glass has viscosity μ and density p. For the small windowpanes common in medieval times this amounts to some millions of years! Thus, window glass behaves as a solid. © 1999 The Royal Society.
DOI: 10.1098/rspa.1999.0425
Appears in Collections:Applied Mathematics publications
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