Investigation of the interface behavior of a viscous fluid under free surface shear flow using an eccentric transparent Couette cell
Author:
Thirunavukkarasu Prashanth12, Fournier Francis1, Pignolet Arnaud1, Castellani Romain1ORCID, Cohen Céline3, Peuvrel-Disdier Edith1ORCID, Valette Rudy1ORCID, Vergnes Bruno1
Affiliation:
1. Mines Paris, PSL University , Centre for material forming (CEMEF), UMR CNRS, 06904 Sophia Antipolis , France 2. Manufacture Française des Pneumatiques Michelin – Ladoux , 63118 Cébazat , France 3. Université Côte d’Azur, CNRS UMR 7010, Institut de Physique de Nice , Parc Valrose, 06108 Nice , France
Abstract
Abstract
In the present work, a prototype was developed to observe the flow behavior of viscous fluids under free surface shear and determine an adhesion energy in this flow geometry. The geometry consists of an eccentric Couette cell (outer cylinder radius of 89.5 mm, inner cylinder radius of 43.75 mm and minimal gap of 3 mm) that can be used in two modes, where both cylinders can respectively rotate in the same or opposite directions. Cylinders are horizontal and short relatively to their diameters (30 mm long). Transparent windows allow in-situ flow observations. The design, development, and testing of the prototype with a model viscous fluid (silicone fluid with a 2.2 104 Pa.s Newtonian viscosity) are reported in this paper. The flow behavior of small fluid volumes (fill factor smaller than 15%) was investigated under co- and counter-rotating configurations to determine steady-state flow conditions. Stationary conditions were identified in the counter-rotating mode. The velocity conditions and resulting observations are studied and analysed. However, for the used silicone fluid, the bulk dissipative energy is much larger than the work of adhesive forces in the investigated regimes. The adhesion energy contribution could not be detected for this fluid.
Funder
This study was carried out within the framework of the OSUM project, FUI AAP23 Thirunavukkarasu’s PhD was funded by Michelin MFP and a CIFRE grant from the French agency Association Nationale de la Recherche et de la Technologie
Publisher
Walter de Gruyter GmbH
Subject
Materials Chemistry,Industrial and Manufacturing Engineering,Polymers and Plastics,General Chemical Engineering
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