Mesh

Launch the Mesher

Now that we have completed creating the geometry of the domain, we are ready to mesh it. Return to the Project Schematic Window. In the Project Schematic window, double click the Mesh box to launch the mesher.

Mapped Face Meshing

First we will apply a mapped face meshing. First, in the Outline window, click Mesh 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). In the details window, select Geometry > Apply. Ensure that Type is set to Element Size, then change the Size from Default to .1.

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 right clicking each of them, and go to Geometry > Apply. Change the Type to Number of Divisions. Next, specify Number of Divisions to 20.

Generate the Mesh

In the Mesh menu, Mesh > Generate Mesh.

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 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.

Click here to enlarge

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

Go to Step 4 - Setup (Physics)