Multi-scale analysis of flow structures in fluidized beds with immersed tubes
Source abstract
Abstract
Abstract Multi-scale analysis and non-linear analysis were combined to investigate the hydrodynamics of fluidized beds with and without horizontal tubes. Pressure fluctuations were measured and analyzed employing discrete wavelet analysis, recurrence plot analysis, and recurrence quantification analysis. A systematic procedure was followed to determine wavelet parameters. At low gas velocities, the energy of macro-structures reduces with the addition of the first tube and then increases with the addition of a second tube. However, there is no notable difference at high gas velocities. Determinism is high for the bed without tubes, which can be attributed to the periodic behavior of bubbles. Determinism decreases with the addition of tubes because the breakage of bubbles results in less periodic behavior. The three methods of analysis used in this study captured the effects of immersed tubes on the hydrodynamics of fluidized beds. Recurrence quantitative analysis was found to be a powerful and easy-to-use method that can capture the nonlinear characteristics of fluidized beds much more quickly than conventional methods of nonlinear analysis. This method can thus be effectively used for the online monitoring of hydrodynamic changes in fluidized beds.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Granular flow and fluidized beds · Lattice Boltzmann Simulation Studies · Fluid Dynamics and Heat Transfer
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (45)
Show source-provided references
1. Non-intrusive monitoring of bubbles in a gas–solid fluidized bed using vibration signature analysis10.1016/j.powtec.2009.08.012 ↗
2. Non intrusive characterisation of fluidised bed hydrodynamics using vibration signature analysis10.1002/aic.12046 ↗
3. Evaluating the probabilities of fluidization regimes10.1021/ie100642b ↗
4. Investigation of bubble behavior in fluidized beds with and without immersed horizontal tubes using a digital image analysis technique10.1016/j.powtec.2011.03.025 ↗
5. Characterization of gas–solid fluidized bed hydrodynamics by vibration signature analysis10.1016/j.ijmultiphaseflow.2011.02.001 ↗
6. Transition from bubbling to turbulent fluidization10.1021/ie00038a041 ↗
7. Chaotic and statistical tests on fiber optic dynamic data taken from the riser section of a circulating fluidized bed10.1016/j.powtec.2011.09.002 ↗
8. Choice of the wavelet analyzing in the phonocardiogram signal analysis using the discrete and the packet wavelet transform10.1016/j.eswa.2009.09.036 ↗
9. The optimisation of pressure measurements for the control of bubbling fluidised beds
10. Dynamic behaviors of heterogeneous flow structure in gas-solid fluidization10.1016/S0032-5910(99)00301-0 ↗
11. Recurrence plots of dynamical systems10.1209/0295-5075/4/9/004 ↗
12. Ellis · 2003
13. SVR-based prediction of point gas hold-up for bubble column reactor through recurrence quantification analysis of LDA time-series10.1016/j.ijmultiphaseflow.2008.07.001 ↗
14. Wavelet analysis to characterize cluster dynamics in a circulating fluidized bed10.1016/j.powtec.2006.12.016 ↗
15. Influence of horizontal tube banks on the behavior of bubbling fluidized beds: 2. Mixing of solids10.1016/S0032-5910(99)00284-3 ↗
16. Influence of horizontal tube banks on the behavior of bubbling fluidized beds: 1. Bubble hydrodynamics10.1016/S0032-5910(99)00021-2 ↗
17. Effect of internal tubes and baffles
18. Characterisation of fluidisation regimes by time-series analysis of pressure fluctuations10.1016/S0301-9322(99)00028-2 ↗
19. Conditional monitoring of moisture content in a fluidized bed dryer by the acoustic emission signature10.1007/s11814-011-0216-0 ↗
20. Heat transfer and bubble characteristics in a fluidized bed with immersed horizontal tube bundle10.1016/S0017-9310(02)00296-X ↗
21. Li · 1994
22. Cartesian grid simulations of bubbling fluidized beds with a horizontal tube bundle10.1016/j.ces.2011.08.056 ↗
23. A theory for multi-resolution signal decomposition: The wavelet representation10.1109/34.192463 ↗
24. Recurrence plot statistics and the effect of embedding10.1016/j.physd.2004.11.002 ↗
25. Recurrence plots for the analysis of complex systems10.1016/j.physrep.2006.11.001 ↗
26. Determination of cluster hydrodynamics in bubbling fluidized beds by the EMMS approach
27. On the axial movement of solids in gas–solid fluidized beds10.1205/026387600527987 ↗
28. Influence of pressure and fluidization velocity on the hydrodynamics of a fluidized bed containing horizontal tubes10.1016/0009-2509(94)E0037-Q ↗
29. Hydrodynamics of a pressurized fluidized bed with horizontal tubes: Influence of pressure, fluidization velocity and tube-bank geometry10.1016/0009-2509(94)00437-V ↗
30. The gaussian spectral pressure distribution applied to a fluidized bed10.1016/j.cep.2008.02.010 ↗
31. CFD multifluid simulation of spouted beds with and without internal draft tubes10.2202/1934-2659.1559 ↗
32. Wavelet analysis of dynamic behavior in fluidized beds10.1016/S0009-2509(00)00313-4 ↗
33. Determination of hydrodynamic behavior of gas–solid fluidized beds using statistical analysis of acoustic emissions10.1016/j.ijmultiphaseflow.2009.06.010 ↗
34. Characterization of fluid dynamics of fluidized beds by analysis of pressure fluctuations10.1016/j.pecs.2007.03.001 ↗
35. Monitoring the quality of the fluidisation using the short-term predictability of pressure fluctuations10.1002/aic.690440107 ↗
36. Characterization of various structures in gas–solid fluidized beds by recurrence quantification analysis10.1016/j.partic.2012.08.005 ↗
37. A generalized bubbling/turbulent fluidized-bed reactor model10.1016/S0009-2509(98)00354-6 ↗
38. Time-series analysis of pressure fluctuations in gas–solid fluidized beds – A review10.1016/j.ijmultiphaseflow.2010.12.007 ↗
39. Application of deterministic chaos theory in understanding the fluid dynamic behavior of gas–solid fluidization
40. Hydrodynamics, erosion and heat transfer in a pressurized fluidized bed: Influence of pressure, fluidization velocity, particle size and tube bank geometry10.1016/S0009-2509(97)00096-1 ↗
41. Multiresolution analysis of pressure fluctuations in a gas–solid fluidized bed: Application to glass beads and polythylene powder system10.1016/j.cej.2006.12.001 ↗
42. Study of transition velocities from bubbling to turbulent fluidization by statistic and wavelet multi-resolution analysis on absolute pressure fluctuations10.1016/j.ces.2007.12.024 ↗
43. Zarghami · 2009
44. Nonlinear characterisation of pressure fluctuations in fluidised beds10.1021/ie800460f ↗
45. Multiscale resolution of fluidized-bed pressure fluctuations10.1002/aic.690490407 ↗