Shannon entropy increment analysis on dynamic behavior of a biomass fluidized bed

Abstract

Information theory based Shannon entropy increment analysis of the differential pressure fluctuations was successfully developed to recognize dynamic behavior of gas-solid flow and different flow patterns. Experiments were carried out in a biomass fluidized bed with cross-section of 100 mm×30 mm and height of 500 mm was carried out. Cylinder-shaped biomass particles with the size of 2.6 mm in diameter and 6 mm in length were used to as bed materials. Pressure fluctuations and flow patterns were obtained by a multi-channel differential pressure sampling system and a high-resolution digital CCD camera, respectively. It was found that both Shannon entropy and the present developed Shannon entropy increment analyses were pronounced with the flow patterns and transitions. Besies, Shannon entropy increment analyses, i.e. Shannon entropy increment and Shannon entropy increment rate, are very helpful to obtain the chaotic nature especially the change of chaotic nature with operating condition in gas-solid flow.