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  • Flat Plate Boundary Layer - Part 2: Flat Plate Convection

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  1. For Pr=1, go to the csv file exported from CFD Post and read off the Nusselt number value for Rex = 10,000 (this process is shown in the Nusselt Number Variation video above). This is the Nusselt number for Pr=1 at that Rex.  

  2. Change Air Cp in Fluent under Setup>Materials>Fluid>Air (to get a Pr=2, you need to double the Cp value for air; note that the values below may be wrong, the picture is just for locating where to to change Cp)

  3. Run more iterations until the you get convergence (when the residuals are below 1e-6). Note you don't need to reinitialize the guess values since the velocity and pressure fields remain the same. Cp affects only the energy equation. 

  4. Export Nux vs. Rex for the new Pr value to a csv file. Read off the Nux value for Rex = 10,000. This is the Nux value for the new Pr at that Rex. 

  5. Repeat for the other Pr values. Create a list of values in Excel from these runs with the following three columns.

         Cp      Pr     Nux

  6. Plot Nux vs Pr in Excel and add the trend line to get a fit and the exponent m

 

 


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