Re: Adhesion strenghtened by a fluid
- From: Uncle Al <UncleAl0@xxxxxxxxxxxxx>
- Date: Tue, 05 Jun 2007 10:48:50 -0700
Julien ÉLIE wrote:
Hi,
I am looking for information regarding a phenomenon in physics:
when we put a few drops of water between two surfaces, the
force needed to separate the two components considerably increases.
For instance: http://people.via.ecp.fr/~iulius/bille.png
(that ball seems to adhere very strongly to the support when
we put a fluid between them)
That is why I wonder what properties and parameters allow
such a phenomenon (the constitutive material of the ball,
the support, the radius of the ball, the fluid, etc.).
Thanks beforehand,
1) Capillarity. Try it with clean microscope slides (hydrophilic)
and with silanized microscope slides (hydrophobic). Try it with
detergent added to water as a middle case with reduced surface
tension.
2) Viscosity upon break vs. surrounding air pressure. Try it with
corn syrup or mineral oil. How 'bout molten vs. solidified paraffin
wax vs. solidified paraffin wax a week later.
--
Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/lajos.htm#a2
.
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- From: Julien ÉLIE
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