| Topic: |
Science > Physics |
| User: |
"" |
| Date: |
07 Nov 2006 05:53:19 PM |
| Object: |
viscosity of fluid |
hi
what would be a simple argument or physical experiment that viscosity
of a particular substance (fluid) is a constant and not a variable of
position and time?
thanks.
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| User: "Dr. Doktur" |
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| Title: Re: viscosity of fluid |
07 Nov 2006 08:16:27 PM |
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<dillogimp@yahoo.com> wrote in message
news:1162943599.091516.206250@e3g2000cwe.googlegroups.com...
hi
what would be a simple argument or physical experiment that viscosity
of a particular substance (fluid) is a constant and not a variable of
position and time?
thanks.
it can be either case.
1. melting a glass rod in a flame.
2. a glass of oil all at the same temperature
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| User: "Andy Resnick" |
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| Title: Re: viscosity of fluid |
08 Nov 2006 09:04:24 AM |
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wrote:
hi
what would be a simple argument or physical experiment that viscosity
of a particular substance (fluid) is a constant and not a variable of
position and time?
thanks.
Viscosity can be defined as a spatially-varying and time-varying field
easily enough. Because viscosity is a material property, if the fluid
is homogeneous, the viscosity has to be a constant. Then the question
is how does viscosity in a real fluid depend on variables like
temperature and pressure, which correspond to spatial and temporal
variations in material properties.
--
Andrew Resnick, Ph.D.
Department of Physiology and Biophysics
Case Western Reserve University
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