| Autor: |
Bonn D; Laboratoire de Physique Statistique, Ecole Normale Supérieure, 24 Rue Lhomond, 75231 Paris cedex 05, France. bonn@lps.ens.fr, Kobylko M, Bohn S, Meunier J, Morozov A, van Saarloos W |
| Jazyk: |
angličtina |
| Zdroj: |
Physical review letters [Phys Rev Lett] 2004 Nov 19; Vol. 93 (21), pp. 214503. Date of Electronic Publication: 2004 Nov 18. |
| DOI: |
10.1103/PhysRevLett.93.214503 |
| Abstrakt: |
When a rotating rod is brought into a polymer melt or concentrated polymer solution, the meniscus climbs the rod. This spectacular rod climbing is due to the normal stresses present in the polymer fluid and is thus a purely non-Newtonian effect. A similar rod climbing of an interface between two fluids has therefore been taken as a signature that one of the fluids exhibits normal stress effects. We show here, however, that the effect can occur with simple Newtonian fluids: it occurs when a Taylor-Couette instability happens in the less viscous of the two liquids but not in the more viscous one. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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