Calculate and display normal vectors

Problem:

How can I calculate and display vectors normal to a surface?

Solution:

Load your dataset and then perform the following steps to calculate normal vectors in Tecplot 360 (not available in Tecplot Focus):

1. Click on the Analyze menu and select Calculate Variables
2. Select Grid K Unit Normal (vector)
3. Set the New Var Location to Cell Center or Node, depending on the desired vector location with respect to the grid.
4. Click Calculate

To display vectors in Tecplot 360/Focus, perform the following steps:

1. Turn on the Vector layer (checkbox to the left of the plot frame)
2. Select the normal vector component variables, when prompted
3. If the normals are located at the cell center, click Zone Style, select the Points tab, and set Points To Plot to Cell Centers Near Surfaces.