Mesh 1
Free Triangular 1
In the Mesh toolbar, click   Free Triangular.
Size
4
In the Model Builder window, click Size.
5
In the Settings window for Size, locate the Element Size section.
6
From the Calibrate for list, choose Fluid dynamics.
7
From the Predefined list, choose Extremely coarse.
8
Click to expand the Element Size Parameters section. In the Minimum element size text field, type 0.001.
9
In the Resolution of narrow regions text field, type 8.
10
Click  Build All.