MUMBAI, India, Aug. 17 -- Intellectual Property India has published a patent application (202617084032 A) filed by Endresshauser Flowtec AG on July 08, 2026, for Method For Determining A Measured Viscosity Value, And Coriolis Mass Flowmeter For Carrying Out The Method.
Inventors include Lin, Yaoying; Rieder, Alfred; Alioli, Mattia; Kumar, Vivek; Fischer, Christian; Braun, Marcel; and Eckert, Gerhard.
The application for the patent was published on August 14, 2026, under issue no. 33/2026.
Abstract: A method (100) serves for determining a measured viscosity value of a medium by means of a Coriolis mass flowmeter with a measuring tube and comprises: exciting (110) a measuring-tube vibration; ascertaining (122) a measured eigenfrequency value f of the measuring-tube vibration; ascertaining (124) a measured damping value Dm; ascertaining (126) a measured flow-rate value,formula (I) of the medium; ascertaining (128) a measured density value ? of the medium; and ascertaining (130) a measured viscosity value (130) ?m as a function of a viscosity-relevant damping coefficient D?, on the basis of the above measured values; wherein the said damping coefficient is obtained from the measured damping value Dm by subtraction of an eigen damping coefficient D0 of the measuring tube and a flow-dependent damping coefficient Df, which can be represented by a model function MD which is proportional to a product of a power of a Reynolds number and a power of a Stokes number, formula (II), wherein the Reynolds number Re and the Stokes number St each include a provisional viscosity value, wherein the following applies for the exponents: 1.8 ERe 1.3; 4.0 ESt 3.4 and 2.8 ES/ER 2.2, wherein the measured viscosity value ?m is ascertained with an algorithm which ascertains the viscosity-relevant damping coefficient D? by the flow-dependent damping coefficient Df being ascertained in relation to the measured damping value Dm by means of the model function MD or by means of a routine which approximates the behaviour of the model function MD and wherein the measured viscosity value is determined as a function of the viscosity-relevant damping coefficient D?.
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