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<iframe width="560" height="315" src="https://www.youtube.com/embed/49U2YxZ9JsA?rel=0" frameborder="0" allowfullscreen></iframe>

Summary of the Above Video:

1. Display Current Mesh:
   1. Mesh>Setup>Display (In newer versions, this is found under the Setting Up Domain tab, then Mesh > Display.)
2. In the Menu
   1. Adapt>Gradient (In newer versions, this is found under Setting Up Domain tab, then Adapt > Mark/Adapt Cells > Gradient.)
      1. uncheck Coarsen in Options Box
      2. select Gradient in Method Box
      3. Gradients of > Pressure > Static Pressure
      4. Compute
3. View Contours 
   1. Contours > Contours of Adaption > Existing Value
   2. Compute
   3. Display
4. Under Contours 
   1. Uncheck Auto Range
   2. Change Min to 10000 
   3. Display
5. Under Refine Threshold enter 10000 
   1. Press Mark
   2. Press Adapt
6. Display the New Mesh

Notice that the area surrounding the shock was refined. Now, re-initialize the solution, (Solution Initialization > Compute From Farfield > Initialize), and rerun the solution (you will also need to increase the number of iterations – I recommend 150).

Now, once again, plot the contours of the mach number. Below is a comparison of the mach number results from the original mesh and the refined mesh.

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