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Weissenberg effect

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Scientific phenomenon
Illustration of the Weissenberg effect on a 2% solution of high molecular weight polyacrylamide

In fluid dynamics, the Weissenberg effect is a phenomenon that occurs when a spinning rod is inserted into a solution of elastic liquid. Instead of being thrown outward, the solution is drawn towards the rod and rises up around it. This is a direct consequence of the normal stress that acts like a hoop stress around the rod. The effect is a common example of non-Newtonian fluid dynamics, which has been shown to occur for polystyrene. The effect is named after Karl Weissenberg who published about it in 1947.

References

  1. "Research".
  2. "Article on the Weissenberg effect by Non-Newtonian Fluid Dynamics Group at the Massachusetts Institute of Technology".
  3. Weissenberg, K. (1947-03-01). "A Continuum Theory of Rhelogical Phenomena". Nature. 159 (4035): 310–311. doi:10.1038/159310a0. ISSN 1476-4687.

External links

Non-Newtonian fluids
Effects
Properties
Generalized Newtonian fluids


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