Dynamic viscosity of water

The dynamic viscosity (also called absolute viscosity) is used to calculate Reynolds Number to determine if a fluid flow is laminar, transient or turbulent.

The sources are:

Symbol
$\eta_w$
Unit
Pa.s
Formulae
$\nu_w \zeta_w$general equation
$-1.3333{\cdot}{10}^{-8} {\theta_w}^3+1.2784{\cdot}{10}^{-6} {\theta_w}^2-6.0181{\cdot}{10}^{-5} \theta_w+1.888{\cdot}{10}^{-3}$seawater
$-1.2949{\cdot}{10}^{-8} {\theta_w}^3+1.2858{\cdot}{10}^{-6} {\theta_w}^2-6.0068{\cdot}{10}^{-5} \theta_w+1.791{\cdot}{10}^{-3}$fresh water
Related
$\theta_w$
$\zeta_w$
Density of water [kg/m$^3$]
Used in
Choices
Liquid0.01°C5°C10°C15°C20°C25°C30°C
Seawater0.001890.001610.001410.0012210.001090.000970.00087
Fresh water0.00179140.0013060.00100160.000890.0007972