Dynamic Viscosity Motor Oils

Overview

Engineering reference data for Dynamic Viscosity Motor Oils in fluid mechanics.

Key Formulas

Reynolds Number

$Re = \frac{\rho v D}{\mu}$

Ratio of inertial to viscous forces — determines flow regime.

Bernoulli's Equation

$P + \frac{1}{2}\rho v^2 + \rho g h = \text{const}$

Conservation of energy for steady, inviscid, incompressible flow.

Continuity Equation

$A_1 v_1 = A_2 v_2$

Conservation of mass for incompressible flow.

Darcy-Weisbach

$\Delta P = f \frac{L}{D} \frac{\rho v^2}{2}$

Pressure drop due to friction in a pipe.

Variables

Viscosity Data by SAE Grade

Unit Conversion Note

The dynamic viscosity values are given in Newton-seconds per square meter ($N \cdot s/m^2$), which is the SI unit of Pascal-seconds ($Pa \cdot s$).

The conversion to other common viscosity units is: $1 \, N \cdot s/m^2 = 1 \, kg/(m \cdot s) = 1 \, Pa \cdot s = 1000 \, cP$

Interactive Charts

References

• Original Source