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Physics Setup
Launch Fluent
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Mesh Interface | Interface Zone 1 | Interface Zone 2 |
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blade_bot | blade_bot_in | blade_bot_outer |
blade_right | blade_right_in | blade_right_outer |
blade_top | blade_top_in | blade_top_outouter |
hub | hub_inner | hub_outer |
Be careful to select the correct in-outer pairs!!
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For us, we will be considering turbulence, and we will use the k-epsilon Realizable model.
Highlight "ModelModels" and double click the third item in the list, "Viscous - Laminar". Select "k-epsilon (2 eqn)". Change "k-epsilon Model" to Realizable. Retain the rest as default. Click Ok.
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From the geometry, the centroid is at the global origin (0,0). Verify that that 's is inputted.
From the problem statement, the turbine is spinning at 40rpm, so go ahead and input 40 to "Rotational Velocity". This is the absolute velocity. Note that "absolute" is selected under "Relative Specification".
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Under "Turbulence", change the "Specification Method" to "Intensity and Length Scale". Set the "Turbulence Intensity (%)" to 5 and the "Turbulent Length Scale (m)" to 1.
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It's very important to change the Specification Method for the Turbulence to "Intensity and Length Scale", otherwise your model won't converge. |
Pressure at the outlet
Locate and highlight "farfield2". Change its Type to "pressure-outlet".
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Go to Step 5: Numerical Solution
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