Tuesday, November 16, 2010

On Stirring Polymer Solutions

One other thought I had following up on yesterday's post about mixing up the PAm/water concentrate was that I knew I had a good batch when I saw the Weissenberg effect. That's the unusual situation that occurs when stirring a polymer solution and instead of seeing the normal vortex that occurs in the center of the swirling, the surface rises up and starts climbing the stirring rod.

Thank goodness we don't use polymer solutions in toilet tanks.


Eric F. Brown said...

So you're saying that this is a normal response.

Monica Bercea said...

First Circular & Call for Papers: Dynamics of Complex Fluids Conference – May 5-7, 2011 – Iasi, Romania


All interested people are invited to present and to discuss current results in the field of complex fluids (design and flow properties). Please submit your paper (title, authors, affiliation, a short abstract of maximum 400 words, with the specification of type of presentation) until February 28, 2011, to the conference office.