Abstract
The characteristics of the structure of the streamwise vortice in the near-wall region are investigated. The streamwise vortices make a pair in the buffer layer and log-region. The pair of the vortices counterrotates each other and lift up more low speed fluid near the wall in between the vortices taking with a separation from the wall surface. The pair of vortices, which is termed "mushroom vortice", generates in the buffer layer and develops inclining to the flow direction.
