Shear thickening in a solution undergoing inverse melting (Articolo in rivista)

Type
Label
  • Shear thickening in a solution undergoing inverse melting (Articolo in rivista) (literal)
Anno
  • 2008-01-01T00:00:00+01:00 (literal)
Alternative label
  • Angelini, R; Salvi, G; Ruocco, G (2008)
    Shear thickening in a solution undergoing inverse melting
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Angelini, R; Salvi, G; Ruocco, G (literal)
Pagina inizio
  • 4109 (literal)
Pagina fine
  • 4116 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 88 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • \"[Angelini, R.; Ruocco, G.] Univ Roma La Sapienza, Res Ctr, CNR, SOFT,INFM, Rome, Italy; [Salvi, G.; Ruocco, G.] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy (literal)
Titolo
  • Shear thickening in a solution undergoing inverse melting (literal)
Abstract
  • \"Rheological measurements on a solution undergoing inverse melting are presented as a function of temperature and concentration. Under shear, this solution exhibits the phenomenon of shear thickening; i.e. an increase in apparent viscosity with increasing shear rate (gamma) over dot. In particular, a shear-thickening transition happens at a critical shear rate (gamma) over dot(c), which increases with increasing concentration. It defines two different regimes: at low shear rates (gamma) over dot < (gamma) over dot(c), the fluid shows Newtonian behaviour, while at shear rates (gamma) over dot > (gamma) over dot(c), a transition from the Newtonian to the shear-thickening regime is observed. This behaviour is interpreted on the basis of a relaxation process activated by the shear and characterised by a relaxation time tau = 1/(gamma) over dot(c). In the thickening region, the viscosity data are well fitted with a power-law model eta((gamma) over dot)) = A (gamma) over dot(n-1), with n = 1.8. The temperature and concentration behaviour of the zero shear viscosity, the power-law exponent and the critical shear rate are discussed.\" (literal)
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