text: STREAMLINE PATTERN AND PRES- 
  SURE DISTRIBUTION. 
  The flow pattern of 
  the cylinder of figure 1.7 is characterized by 
  the streamlines which denote the local flow 
  direction. Velocity distribution 
  is noted by 
  the streamline pattern since the streamlines 
  effect a boundary of flow, and the airflow 
  between the streamlines is similar to flow in a 
  closed tube. When the streamlines contract 
  and are close together, high local velocities 
  exist; when the streamlines expand and are 
  far apart, low local velocities exist. At the 