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Monitor Point Data and res Discrepancy

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Old   November 27, 2012, 00:08
Default Monitor Point Data and res Discrepancy
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WGJ
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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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Old   November 27, 2012, 06:11
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Glenn Horrocks
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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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Old   November 27, 2012, 14:30
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Quote:
Originally Posted by ghorrocks View Post
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.
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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