Skip to main content
Engineering LibreTexts

3.6: The Thickness of the Viscous Sub Layer δv

  • Page ID
    29288
  • Very close to the pipe wall the flow is laminar in the so called viscous sub layer. The thickness of the viscous sub layer is defined as:

    \[\ \delta_{\mathrm{v}}=11.6 \cdot \frac{v_{1}}{\mathrm{u}_{*}}\]