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1. (WO2017149212) DEVICE AND METHOD FOR MEASURING THE VISCOSITY OF A FLUID AS A FUNCTION OF ITS SHEAR RATE AND ITS TEMPERATURE

Pub. No.:    WO/2017/149212    International Application No.:    PCT/FR2017/000039
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Sat Mar 04 00:59:59 CET 2017
IPC: G01N 11/04
Applicants: FORMULACTION SAS
Inventors: ABGRALL, Patrick
Title: DEVICE AND METHOD FOR MEASURING THE VISCOSITY OF A FLUID AS A FUNCTION OF ITS SHEAR RATE AND ITS TEMPERATURE
Abstract:
The invention relates to a measuring method for determining the viscosity of a fluid that is to be studied as a function of the shear rate applied to the fluid, using a device comprising a flow duct (10) at the end of which are two supply inlets (11, 12) connected to means (13, 14) for injecting a reference fluid and a fluid that is to be studied. The method comprises the following steps: calculating the initial flow rates of the reference fluid and the fluid that is to be studied for a given shear rate, starting the fluid injection means (13, 14), once the flow has stabilized, observing the visibility and the position of the interface between the two fluids, – iteratively changing the flow rate of the reference fluid as long as the interface is not detectable and positioned at a predetermined width, determining the viscosity of the fluid that is to be studied for the shear rate.