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Drag and lift monitors in Fluent 18?

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Old   June 22, 2017, 22:28
Question Drag and lift monitors in Fluent 18?
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Mathew Liebowitz
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Hi

I have recently shifted to version 18 of Fluent. The UI has received a slight update, and in the solver, the monitors for the drag and lift coefficients are no longer where they used to be (under the Solution Monitors).

Could anyone please let me know where to find the option to turn these on? Again, I am referring to the plots versus number of iterations (or other scales) that can be viewed alongside the residuals, while the solution is being calculated.

I have checked the updated Help section, and looked at online guides, but to no avail.

Many thanks,
Matt
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Old   June 23, 2017, 03:10
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Guiliguili
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Hi,

On the menu:
Solving → Reports → Definitions → New → Force Report → Choose Drag, Lift or Moment.

On the tree:
Solution → Report Definitions → New → Force Report → Choose Drag, Lift or Moment.

Make sure that Coefficient is selected in "Report Output Type" instead of Force, and select the wall(s).
Check "Report Plot" for a plot of the coefficient (Drag, Lift or Moment) while the simulation is running. You can check also Report File if you want to save the results in a file for a post-process with another software for example.

T.
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Old   June 23, 2017, 11:08
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Thank you so much, Touré!
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Old   December 5, 2017, 13:17
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Thank you, this was very helpful. Do you know how to Plot the Drag and Lift Report again, after its closed, in Fluent 18 or CFD Post?

The way I am plotting it is opening the .OUT file in Excel and separating the spaces in different columns, and then plotting X vs Y. But it takes some time and dont feel very comfortable with this method, since I have many results and want to compare them (for example using Workbench... )
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Old   December 6, 2017, 19:36
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I don't see nowhere the plot button to plot the Drag and Lift Report again, after its closed, in Fluent 18.

First method (might work but not always), if the Fluent project is not closed but only the plot windows are closed. Go to the Tree --> "run calculation" specify a "Number of iterations" = 0 and click on Calculate. The windows will pop up again.

Second method (will work for sure), if you have saved the report files. Go the tree: Results --> Plots --> File --> Click on "Add" (In the new window, you can select the files and make sure that "Files of type" is "All files (*)" otherwise you might not see some of the files because "Files of type" is "XY Files (*.xy)" by default)
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