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It is very important that you take the time to check the validity of your solution.

This section leads takes you through some of the steps you can take to validate your solutionrequired to refine your initial results and hopefully make them closer to the experimental results.

In this section, you will:

1. Refine the initial mesh

2. Compare the accuracy of the refined mesh to the original mesh.

Refine Mesh

Let's repeat the solution on a finer mesh with more smaller element size.Repeat the mesh steps, but this time use edge sizing of 50 and 0.02. In the workbench, under Force Convection project, right click on Fluid Flow (FLUENT) and click duplicate. Rename the duplicate project to Force Convection Refined Mesh. You should have two projects cell in workbench.

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Finally, double click on Results cell of Forced Convection to compare. Under Outline tab, click on the results of interest to analyze.

Centerline Pressure

Let's us look first look at the Pressure drop along the centerline.

 enlarged view

The refined mesh pressure correspond better with the experimental data. 

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