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The mesh should now generate.

Named Selections

Next, we will have to specify names of different portions of the geometry to use in FLUENT to define boundary conditions. Make sure the Edge Selection Filter Image Added is selected before proceeding.

Inlet

Select the left, vertical edge of the geometry with a left mouse click - it should highlight green. Right click, and select Create Named Selection. Name the selection Inlet. Click OK once finished.

Centerline

Next, we will specify the axis/centerline of the pipe. Select the bottom surface of the pipe, and create a named selection. Name it Centerline.

Isothermal Wall

We will now specify the portion of the wall that is isothermal. Select the left portion of the upper surface of the pipe. Create a named selection and call it Isothermal Wall.

Heated Wall

We will now specify the portion of the wall that is heated. Select the right portion of the upper surface of the pipe. Create a named selection and call it Heated Wall.

Outlet

Finally, we will specify the outlet of the pipe. Select the right, vertical edge of the pipe. Create a named selection, and call it Outlet.

We are done with the mesh creation, so we can now save the project, and close the mesher.

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