Christopher Neal - 2016-05-02
In 1947, Karl Weissenberg published a paper discussing the ability of some fluids to climb a spinning rod. This phenomena, commonly referred to as the "Weissenberg Effect," has an elusive reasoning that requires at least a basic understanding of fluid characteristics and behaviors. This video, created for an extra credit assignment for University of Tennessee Chemical Engineering student Christopher Neal's Fluid Flow and Heat Transfer class, discusses those basic fluid behaviors and seeks to describe the way that pseudoplastics conglomerate around and climb a spinning rod exposed to rotational shearing.
I saw this video years ago. It's nice to have finally found it again. Very interesting.
Well, now I have another physical phenomena to obsess over for a month.
MOON GOO
DIE SWELL
If pseudoplastics exhibit the Weissenberg effect, do dilatant fluids show the opposite?
its actually Newtonian fluids that have that effect . I'm doing a lab report and a lot of that is wrong
Hi Samara. I'm not sure where you heard this but thats not exactly true. Newtonian fluids don't exhibit shear thinning or thickening as the shear rate increases. Notice the diagram in the slides that shows a constant viscosity for Newtonian fluids. Without a change in viscosity, the Weissenberg effect cannot occur.
@Christopher Neal You beat me to the reply!
ThoseOneAirsofters - 2018-02-21
Great video! Explained the effect way better than my professor did.