Study of transition velocities from bubbling to turbulent fluidization by statistic and wavelet multi-resolution analysis on absolute pressure fluctuations

Impact of size and temperature on the hydrodynamics of chemical looping combustion

“…Increase of gas velocity above this threshold results in breakage of bubbles. Accordingly, pressure fluctuation reaches to its maximum level in this velocity [13]. diameter.…”

Pressure drop and pressure fluctuations in spouted beds with binary mixtures of particles

“…Standard deviations of the pressure fluctuations has been widely used to identify a regime change in gas-solid fluidized beds [26][27][28][29][30]. Table 2 shows the averaged values and standard deviations of differential pressure fluctuations collected at different bed sections in a spouted bed.…”

“…In the literature, it has been reported that A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT 4 the standard deviation or the average absolute deviation is often used to identify a flow regime change [26][27][28][29][30]. The statistical analysis in time domain is the simplest and the most commonly employed; it is also very fast and easily applicable.…”

Shannon Entropy Analysis of Dynamic Behavior of Geldart Group B and Geldart Group D Particles in a Fluidized Bed

“…Gas-solid flow pattern identification is one of the most important applications of pressure fluctuation analysis. Yang and Leu (2008), Bi et al (2000), Bai et al (1996), and Kehoe and Davidson (1970) provided detailed descriptions of gas-solid two-phase flow patterns and transitions in fluidized beds. However, until now the discrimination of turbulent fluidization has been a matter of controversy.…”