...
The geometry is a rectangle of length 1 m and height 0.5 m. The following instructions are for creating the geometry in DesignModeler which is now a legacy tool. SpaceClaim is the recommended geometry engine. The steps for creating a rectangle using SpaceClaim are covered in Dr. Bhaskaran's free online course at edX.org. Go to section 4.3 Laminar Pipe Flow > Geometry. Don't forget to use the dimensions for this problem while creating the rectangle in SpaceClaim.
...