X-Message-Number: 30701
From: David Stodolsky <>
Subject: Relaxation function for a glass-forming system
Date: Mon, 21 Apr 2008 10:41:22 +0200

Relaxation function for a glass-forming system

http://www.weizmann.ac.il/chemphys/cfprocac/Movie/Glass_gif.html


Theory of glass-formation and the mechanical properties of amorphous  
systems

http://www.weizmann.ac.il/chemphys/cfprocac/


Speaker: Prof Itamar Procaccia The Barbara and Morris L. Levinson  
Professorial Chair in Chemical Physics The Weizmann Institute of  
Science Rehovot 76100, Israel
Title : "The riddle of drag reduction by polymers and its resolution"
Date : Wednesday, 31st August 2005 Time : 2.30 p.m
Venue : Lecture Hall-I
Abstract: The phenomenon of drag reduction in wall-bounded turbulence  
by minute concentrations of long-chained polymers is known since the  
1940's. Despite being used in a number of technological applications  
including the Alaska pipeline, the phenomenon remained unexplained for  
a long time. Since polymers stretch in a turbulent medium and increase  
the effective viscosity,it appears counterintuitive that they should  
reduce rather than enhance the turbulent drag. In this colloquium I  
will review a recent theory that provides a quantitative understanding  
of the phenomenon, including its universal and non-universal aspects.  
I will assume neither prior knowledge of the phenomenon nor prior  
familiarity with either turbulence or polymer physics.
http://www.serc.iisc.ernet.in/broadcast_messages/msg05882.html

Scaling Theories of Turbulence
http://online.kitp.ucsb.edu/online/hydrot_c00/procaccia/

dss
David Stodolsky    Skype: davidstodolsky

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