Near wall velocity distribution of turbulent swirling flow in a pipe. Log formula representation.

Swirling flow close to a wall has been studied. The measured velocity distribution near the wall indicated that the flow is hot skewed in this region. A mixing length model can be applied to this region of flow. When the swirl component is weak, the centrifugal force effect on the flow is small enough to neglect, and the flow is similar to that on a flat plate. As the swirl intensity increases, the centrifugal force has a noticiable effect on the flow structure, and the Monin-Obuknov formula is successfully used to calculate the flow.