Under Relaxation Factor
 

How to change Under Relaxation Factors for Pressure and Velocities as when I am trying to run a model , I am getting these error:

Error - 006 - Differencing between Stagnation Pressure and Static Pressure at Region 12 negative.

Try to lower Relaxation Factor for Pressure and / or Velocities.

Region 12 is stagnation Inlet.

AB