Apparatus, method, and program for obtaining rheological properties of non-Newtonian fluids

The apparatus and method address the challenge of determining rheological properties of non-Newtonian fluids by measuring flow rate and pressure differences to calculate yield stress and viscosity coefficients, achieving accurate characterization of viscosity and shear behavior.

JP7894082B2Active Publication Date: 2026-07-23Q P CORP +1
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Q P CORP
Filing Date
2022-07-29
Publication Date
2026-07-23

AI Technical Summary

Technical Problem

Existing methods struggle to determine the rheological properties of non-Newtonian fluids, specifically the viscosity coefficient K, viscosity index n, and yield stress σ0, without assuming a yield stress σ0 value.

Method used

An apparatus and method that measure flow rate Q and pressure difference ΔP under varying conditions to calculate yield stress σ0, and then use equations (1) and (2) to determine viscosity coefficient K and viscosity index n, utilizing the Herschel-Bulkley and Casson models.

Benefits of technology

Accurately calculates rheological properties of non-Newtonian fluids with high stability across various conditions, enabling precise characterization of viscosity and shear behavior.

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Patent Text Reader

Abstract

To obtain a rheology characteristic value of non-Newtonian fluid.SOLUTION: A device to obtain a rheology characteristic value of non-Newtonian fluid that flows in a pipeline having a circular cross section comprises: a pressure information acquisition mechanism that acquires information associated with a pressure difference ΔP of non-Newtonian fluid between one site of the pipeline and other site which has a distance L apart from the one site toward a downstream side being flowed by the non-Newtonian fluid, in three or more conditions, at least one of a radius Rp of the pipeline and a flow amount Q of the non-Newtonian fluid flowing in the pipeline being a different condition; and a calculation unit that calculates yield stress σ0 as the rheology characteristic value from a formula (1) on the basis of the radius Rp, the flow amount Q, the distance L and the pressure difference ΔP in the conditions, and calculates a viscosity coefficient K and a viscosity index n as the rheology characteristic value from a formula (2) on the basis of the radius Rp, the flow amount Q, the distance L and the pressure difference ΔP, as well as the calculated yield stress σ0.SELECTED DRAWING: Figure 1
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