|April 8, 2011, 05:07||
sampling interval and sampling frequency
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I am solving a time-dependent problem using fluent. Fluent help says "You can set the Sampling Interval such that Data Sampling for Time Statistics can be performed at the specified frequency". However, I am puzzled by the relation between sampling interval and sampling frequency. I wonder whether the following equation is right.
sampling frequency=1(time step sizesampling interval)
In addtion, how can I set an appropriate Sampling Interval, according to sampling frequency in the experiment?
Thanks for your help!
|November 3, 2014, 16:26||
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I have the same question and wondering if can provide me the answer.
|November 5, 2014, 23:07||
Join Date: Apr 2011
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There is no sampling frequency option. There is only a sampling interval.
Sampling Interval = 1 means sample every time-step
Sampling Interval = 2 means sample every other time-step
To achieve a certain sampling frequency (with units 1/s), you must choose the sampling interval and time-step size accordingly.
The relation between frequency, sampling interval, and time-step size given was correct.
frequency = 1/(step-size x sampling interval)
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