Previous: Developed Boundary Layer Up: What is Turbulence? Next: Momentum Thickness

This is an automatically generated documentation by LaTeX2HTML utility. In case of any issue, please, contact us at info@cfdsupport.com.

Boundary Layer Thickness

The boundary layer thickness, 17 2, is the distance across a boundary layer from the wall to a point where the flow velocity has essentially reached the ‘free stream’ velocity, 18 3, or 19 3. This distance is defined normal to the wall, and the point where the flow velocity is essentially that of the free stream is customarily defined as the point where 20 2 21 2 22 2

sketch laminar turbulent boundary layer transition to turbulence

Figure: A simple sketch of boundary layer thickness definition. The sketch also shows the boundary layer development. When the free-stream inlet velocity is uniform and laminar (or low intensity of turbulence). When approaching the wall, the boundary layer is first laminar and then becomes transitional and finally turns to turbulence.