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[Sponsors] |
March 22, 2019, 19:44 |
RMS is missing?
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#1 |
Member
Oguzhan
Join Date: Aug 2017
Posts: 38
Rep Power: 9 |
Hi,
I remember there used to be RMS option for unsteady statistics in FLUENT but I dont seem to find RMS, there is just RMSE. When I check the user/theory guide, it does still mention both RMS and RMSE. Does anyone know why RMS is not available? Thanks. |
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March 23, 2019, 01:19 |
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#2 |
Senior Member
Lucky
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 5,750
Rep Power: 66 |
RMS has been corrected to RMSE. There's never been an RMS option, that was a typo and a bug. Before it said RMS but was actually calculating the RMSE. It has always calculated the RMSE and the interface has been updated to reflect that.
Well, it wasn't a bug per se. But a lot of people (like you) get it confused. It was presumed obvious that it is was the rms of the velocity fluctuations which is the rmse of the full velocity. |
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March 23, 2019, 16:19 |
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#3 | |
Member
Oguzhan
Join Date: Aug 2017
Posts: 38
Rep Power: 9 |
Quote:
Thanks. Last edited by heisenmech; March 24, 2019 at 07:54. |
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March 25, 2019, 08:56 |
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#4 |
Senior Member
Lucky
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 5,750
Rep Power: 66 |
Right. rms of velocity fluctuation u' (which has 0 mean) is the same as the rmse of the instantaneous velocity u(t), which does not have 0 mean.
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Tags |
flow statistics, rms, rmse, unsteady flow, unsteady statistics |
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