Title: dynamic viscosity
Long Title: IUPAC Gold Book - dynamic viscosity
DOI: 10.1351/goldbook.D01877
Status: current
Index: quantity

Definition
For a laminar flow of a fluid the ratio of the shear stress to the velocity gradient perpendicular to the plane of shear.

Related Terms
- gradient: https://goldbook.iupac.org/terms/view/G02669
- kinematic viscosity: https://goldbook.iupac.org/terms/view/K03395
- shear stress: https://goldbook.iupac.org/terms/view/S05638

Source
- Green Book, 2nd ed., p. 13 (https://goldbook.iupac.org/files/pdf/green_book_2ed.pdf)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/D01877/html
- json: https://goldbook.iupac.org/terms/view/D01877/json
- xml: https://goldbook.iupac.org/terms/view/D01877/xml

Citation: Citation: 'dynamic viscosity' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.D01877
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Accessed: 2026-05-11T05:15:51+00:00