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November 26, 2012, 23:08 |
Monitor Point Data and res Discrepancy
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#1 |
New Member
Join Date: Aug 2012
Posts: 3
Rep Power: 13 |
I was simulating a transient flow. I set up a monitor point at a certain location to monitor the velocity. After the flow had been solved I exported the monitor point data from the CFX solver manager. When I went to CFX post and plot the velocity at that same location versus time and then exported that data, I found the velocities to be totally different from the ones I got with the monitor points, but they are at the same location. Can anyone tell me what I'm doing wrong? I'm using CFX 14. Thanks a lot.
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November 27, 2012, 05:11 |
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#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,703
Rep Power: 143 |
How much different are they?
I am pretty sure the solver monitor point just uses the nearest nodal value but CFD-Post interpolates, so if the flow has steep spatial gradients this would explain some difference. |
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November 27, 2012, 13:30 |
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#3 |
New Member
Join Date: Aug 2012
Posts: 3
Rep Power: 13 |
Thanks for the clarification. The values at every timestep were different but I calculated the RMS value of the velocity they were off by 1% ish. I guess I can consider them the same.
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