Slipping zone location in squeeze flow

• Published in: Rheologica acta Vol. 45; no. 4; pp. 444 - 448
• Main Authors: ESTELLE, Patrice, LANOS, Christophe, PERROT, Arnaud, SERVAIS, Colin
• Format: Conference Proceeding Journal Article
• Language: English
• Published: Berlin Springer 01.04.2006; Springer Nature B.V; Springer Verlag
• Subjects: Boundary conditions; Cross-disciplinary physics: materials science; rheology; Engineering Sciences; Exact sciences and technology; Fluid dynamics; Fluid mechanics; Fluids mechanics; Fundamental areas of phenomenology (including applications); Mechanics; Non-newtonian fluid flows; Physics; Plates; Rheological measurements; Rheology; Rheometry; Techniques and apparatus; Wall slip; Viscoelastic fluid; Squeezing; Shear viscosity; Squeeze film; Measuring methods; Flow visualization; Flow Modelling; Slipping support; Experimental study; Elongational flow; Rheometer; Wall slip
• ISSN: 0035-4511; 1435-1528
• DOI: 10.1007/s00397-005-0070-2

In squeeze flow rheometry, the main problem is the boundary condition between the squeezed material and the plates. Therefore, the crucial assumption is to know the location and the shape of the sample part where wall slip may or may not occur. This question is investigated from experimental results. For this, squeeze flow experiments are carried out to visualize the flow pattern at the walls. Influence of boundary conditions is particularly studied using different plate surface condition. As a result, with wall slipping conditions, we propose a flow modelling divided into two zones: a circular central zone of the sample sticks on the plates and, beyond that zone, the sample slips at the plates with friction.