...
First we will apply a mapped face meshing. First, in the Outline window, click to show the Mesh menu in the menu bar. In the Meshing Menu, select Mesh Control > Mapped Face Meshing. In the Graphics window, click on the domain face to select it, then in the Details window, click Geometry > Apply.
Edge Sizing
To create the edge sizings, go to Mesh Control > Sizing. Next, we need to select the edge selection filter . Click and drag over the bottom, and top two surfaces (remember, the top surface has been split into two surfaces). The surfaces will highlight green when they've been selected. In the details window, select Geometry > Apply. Ensure that Type is set to Element Size, then change the Size from Default to 0.
105
.
Now, we will create an edge sizing for the vertical edges of the geometry. Create another edge sizing, and this time, choose the left and right vertical edges of the geometry by holding Ctrl and selecting each of them, and go to Geometry > Apply. Change the Type to Number of Divisions. Next, specify Number of Divisions to 20
30
.
Generate the Mesh
In the Mesh menu, Mesh > Generate Mesh.
...