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We will create a nice, regular mesh which is done using the "mapped face meshmeshing" option. A mapped face mesh is a mesh that can be mapped to a rectangular domain, hence the name. Our domain is already rectangular, thus mapped faced meshing will yield a rectangular grid as the mesh.
First (Click) Mesh, 
in the model tree. Next, (Click) Mesh Control > Mapped Face Meshing, as shown below.
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https://confluence.cornell.edu/download/attachments/146918513/MFM_Full.png |
Then, click on the rectangle and it should highlight be highlighted in green. If it does not highlight in green, click on the face selection filter button,
at the top of the GUI,then click on the rectangle. Once the rectangle has been selected, (Click) Apply in the "Details of Mapped Face Meshing" table as shown below. 
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https://confluence.cornell.edu/download/attachments/146918513/DMFM_Full.png |
ANSYS now knows that a mapped face mesh has to be generated for the rectangle. Next, (Click) Update,
, in order to generate the mesh. You should obtain the following mesh. 
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https://confluence.cornell.edu/download/attachments/146918513/GenMesh_Full.png |
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This completes the meshing process for this simulationproblem.
Save
Save the project now. Do not close Mechanical yet.
Go to Step 4: Setup (Physics)
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