I have two graphs of pressure and velocity at a point over the time and they need to be in-phase .
There is a small value of phase difference between these graphs.
What percentage of this value is acceptable and we can say that they are in-phase?
It is better to ready books or research papers about "how to use the error in approximation". I think numerical mathematics will answer this question. Most of the time it is recommendable to use random error of 0.5, 0.05, or 0.005, and it depends on the solving method. Please read about numerical mathematics and you will get the answer rather than just using it by try and error.
Thank dear Asrat
I didn't find any paper about in-phase graphs and acceptable error percentage in that.
If you have any idea please introduce it to me.
Thanks again
Could you see the following links, please? Or please explain about your problems and solving method if the following are not important.
1) https://www.researchgate.net/figure/The-percentage-errors-of-offset-amplitude-phase-and-frequency-estimation-of-the-new_fig2_3089069
2) https://www.researchgate.net/figure/Percentage-errors-in-current-phase-angle-measure-ments_tbl2_3353381
3) https://www.edaboard.com/threads/integrator-design-phase-error.197697/
4) http://ispg.ucsd.edu/wordpress/wp-content/uploads/2018/08/2018-TCASI-I.-Galton-Understanding-Phase-Error-and-Jitter-Definitions-Implications-Simulations-and-Measurement.pdf
Many thank dear Asrat
I checked your links and understood what i want.
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