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Verification & Validation
Create Another Instance of the Project
Return to the Project Schematic Window. Right click on the Fluid Flow (FLUENT) box 
, and select Duplicate. This will create another instance of the project. When the duplicate box generates, rename it Refined Mesh
Refine the Mesh
Open up the mesher of the newly created project by double clicking 
box of Refined Mesh. We want to refine the mesh by increasing the number of elements. To accomplish this, expand Mesh in the Outline window, and click Edge Sizing. If you followed the tutorial, this should be an element sizing of the horizontal lines of the domain. Decrease the Element Size from 0.1 to .025. Next, click Edge Sizing 2, the divisional edge sizing of the outlet and inlet. Increase the Number of Divisions to {{80)) divisions. In the menu bar, select Mesh > Generate Mesh. After the Mesh Generates, close the mesher.
Connect The Unrefined Mesh's Solution
Return to the project schematic. We want to be able to compare the Unrefined Mesh's results to those of the Refined Mesh. To accomplish, click and drag the Solution Box 
of the 2D Steady Convection project instance to the Results Box of the Refined Mesh Project instance. See the picture below for clarification.
Next, press 
to update the project.
View Results
Next, open the Post Processor of the Refined Mesh project instance by double clicking 
.