text: 
  
  - GREATER THICKNESS 
  - 
  - 
  -  - 
  - 
  - GRADUAL VELOCITY CHANGE 
  - 
  
  LOW THICKNESS 
  LOW VELOCITIES NEXT TO SURFACE 
  
  HIGHER VELOCITIES NEXT TO SURFACE 
  SHARP VELOCITY CHANGE 
  HIGHER SKIN FRICTION  LOW SKIN FRICTION 
  
  figure 7.24. Boundary Layer Charactorisfics 