Dynamic viscosity (dyn.visc.)

by | Feb 4, 2020 | List of kinds-of-property, Kind-of-quantity

Dynamic viscosity (dyn.visc.)

Synonym

 Coefficient of internal friction

Abbreviation

 Dyn.visc.

Definition in words

Shear stress in the x,z plane in a fluid divided by velocity gradient perpendicular to the plane of shear (Reference 1)

Note 1: Shear stress is the “force acting tangentially to a surface divided by the area of the surface” (F/A)

Note 2: Velocity gradient is change of velocity divided by elapsed time (ΔV/ΔT)

Definition by equation

Systematic terms

 Dynamic viscosity of component B in system 1

Result type

 Rational scale
  • Value sets are positive numerical values
  • Algebraic operations are allowed (a=nb; a≠nb)
 Numerical values from 0-∞

Unit

 µPa s, mPa s, Pa s, etc.

Special rule(s) in the NPU syntax

 The Celsius Temperature of the measurement procedure should be stated.

Non-recommended term

 Viscosity

Reference
  1. IUPAC Goldbook homepage. http://goldbook.iupac.org
  2. Ferard G, Dybkaer R, Fuentes-Arderiu X. Compendium of Terminology and Nomenclature of Properties in Clinical Laboratory Sciences : Recommendations 2016. 1 ed: Royal Society of Chemistry; 2016. 182 p.

Laboratory field

Examples

Clinical Chemistry
Example 1
 
Generic abbreviated form NPU28466 B—Blood; dyn.visc.(37 °C) = ? mPa s
Full form with a result NPU28466 Blood—Blood; dynamic viscosity(37 °C) = 3 milliPascal second
Abbreviated form with a result NPU28466 B—Blood; dyn.visc.(37 °C) = 3 mPa s
Written expression The dynamic viscosity of Mrs. Smith’s blood is [3] mPa s. The measurement is performed at 37 °C.
Equation
Example 2
Generic abbreviated form NPU27754 P—Plasma; dyn.visc.(37 °C) = ? mPa s
Full form with a result NPU27754 Plasma—Plasma; dynamic viscosity(37 °C) = 1.28 milliPascal second
Abbreviated form with a result NPU27754 P—Plasma; dyn.visc.(37 °C) = 1.28 mPa s
Written expression The dynamic viscosity of Mr. Smith’s plasma is [1.28] mPa s. The measurement is performed at 37 °C.
Equation

Reference

 NPU database, https://www.ifcc.org/ifcc-scientific-division/sd-committees/c-npu/npusearch/ and http://www.labterm.dk/default.aspx

  • Kind-of-property

    • Nominal kind-of-property

    • Kind-of-quantity

      • Unitary kind-of-quantity

        • Rational unitary kind-of-quantity

          • Dynamic viscosity

Reference
  • Dybkaer R. Concept system on ‘quantity’: formation and terminology. Accredit Qual Assur. 2013;18(3):253-60.
  • Dybkaer R. ISO terminological analysis of the VIM3 concepts ‘quantity’ and ‘kind-of-quantity’. Metrologia. 2010;47(3):127-34.
Date Term Note
2009-11-26 Dynamic viscosity Term established

NPU term identifier

 QU100352