Background-Flow Considerations Wake Stagnation point Separation point Boundary layer Favorable Adverse pressure gradient pressure gradient aP <0 aP >0 Ox #6 Heat Transfer Su Yongkang School of Mechanical EngineeringHeat Transfer Su Yongkang School of Mechanical Engineering # 6 Background – Flow Considerations Favorable pressure gradient  0   x P Adverse pressure gradient  0   x P Stagnation point Separation point Wake