Power spectrum analysis for pressure fluctuation

It can be concluded from the figures that the pressure fluctuation due to the impingement between the opposing streams in the SCISR has the charactistics of wide spectra and multi-frequency, and the fluctuation energy is concentrated mainly in a range of frequency no greater than 1000 Hz, with weaker fluctuation in the acoustic wave range. 

The pressure fluctuation in liquid-continuous impinging streams must affect the micromixing status and, consequently, it favors reaction kinetics. The substances related to this topic will be discussed in the following chapters. 

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