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September 13, 2017, 12:26 |
Drag force calculation using URANS
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#1 |
New Member
Felipe Silva Maffei
Join Date: Dec 2015
Posts: 11
Rep Power: 10 |
Hi,
I'm working in my end-of-graduation-course paper, it's ,briefly speaking, a study about the flow behavior under a NACA0015 with a flap and gurney flap. Becouse of the size mesh and turbulence model, a steady state simulation do not converge (residual target 1e-6), so I used URANS. I know how to calculate the average of variables, but, here is my question, can I calculate the average of drag force? Last edited by Maffei; September 13, 2017 at 12:28. Reason: erro in title |
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September 13, 2017, 19:06 |
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#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,703
Rep Power: 143 |
If I was doing this I would:
* Make a monitor point which had the drag force. * Run the simulation * make a solver monitor to display the drag force for each time step. Make the X axis time, not iteration number * Export the data to a csv file * Load the CSV into excel, matlab, python or whatever you use for mathematics and calculate time averages or whatever you want. |
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September 16, 2017, 20:48 |
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#3 |
New Member
Felipe Silva Maffei
Join Date: Dec 2015
Posts: 11
Rep Power: 10 |
thanks for answering,
I need to do the average of drag force acting under the airfoil,I think that this resolution will not work. Am I correct? |
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September 17, 2017, 21:01 |
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#4 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,703
Rep Power: 143 |
You think the Resolution of what will not work?
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September 18, 2017, 00:22 |
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#5 |
New Member
Felipe Silva Maffei
Join Date: Dec 2015
Posts: 11
Rep Power: 10 |
no, my question is whether I can set up the bondary at CFX pre.
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September 18, 2017, 00:38 |
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#6 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,703
Rep Power: 143 |
I do not understand your question. Can you say what your question is again, but more clearly?
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Tags |
cfd, cfx, urans |
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