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Grid! Scale...
(a) Select mm from the Grid Was Created In drop-down list.
(b) Click the Change Length Units button. All dimensions will now be shown in millimeters.
(c) Click Scale and close the Scale Grid panel. 4. Display the mesh. Display /Grid...
(a) Make sure that inlet, outlet, substrate-wall, and wall are selected in the Surfaces selection list. (b) Click Display.
(c) Rotate the view and zoom in to get the display shown in Figure 7.2. (d) Close the Grid Display panel.
The hex mesh on the geometry contains a total of 34,580 cells.
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Step 2: Models
1. Retain the default solver settings. Define /Models /Solver...
2. Select the standard k-ε turbulence model. Define/ Models /Viscous...
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Step 3: Materials
1. Add nitrogen to the list of fluid materials by copying it from the Fluent Database for materials. Define /Materials...
(a) Click the Fluent Database... button to open the Fluent Database Materials panel.
i. Select nitrogen (n2) from the list of Fluent Fluid Materials.
ii. Click Copy to copy the information for nitrogen to your list of fluid materials. iii. Close the Fluent Database Materials panel. (b) Close the Materials panel.
Step 4: Boundary Conditions. Define /Boundary Conditions...
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1. Set the boundary conditions for the fluid (fluid).
(a) Select nitrogen from the Material Name drop-down list. (b) Click OK to close the Fluid panel.
2. Set the boundary conditions for the substrate (substrate).
(a) Select nitrogen from the Material Name drop-down list.
(b) Enable the Porous Zone option to activate the porous zone model.
(c) Enable the Laminar Zone option to solve the flow in the porous zone without turbulence.
(d) Click the Porous Zone tab.
i. Make sure that the principal direction vectors are set as shown in Table7.1. Use the scroll bar to access the fields that are not initially visible in the panel.
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