Evaluation of a tube-based constitutive equation using conventional and planar elongation flow optical rheometers

Ghalia Boukellal (1) , Audrey Durin (1) , Rudy Valette (1) , Jean-François Agassant (1)

1 CEMEF - Centre de Mise en Forme des Matériaux

The predictions of the Marrucci and Ianniruberto model (2003) have been studied in various rheometric flows as well as a planar elongation flow using the 'optical elongational rheometer' technique proposed by Schuberth and Münstedt (Rheol Acta 47:111-119, 2008). This combination of techniques extended the range of pertinence of the model to high-extensional rates. Relevance of the identified parameters with respect to tube theory was then discussed.

Mots clés: Birefringence; Laser-Doppler velocimetry; Planar elongational flows; Tube-based constitutive equations

Domaines: Matériaux

Ghalia Boukellal, Audrey Durin, Rudy Valette, Jean-François Agassant. Evaluation of a tube-based constitutive equation using conventional and planar elongation flow optical rheometers. Rheologica Acta, 2011, 50 (5-6), pp.547-557. ⟨10.1007/s00397-011-0573-y⟩. ⟨hal-00612051⟩