Experimental study and Shannon entropy analysis of pressure fluctuations and flow mode transition in fluidized dense phase pneumatic conveying of fly ash--颗粒学报PARTICUOLOGY

Alkassar, Y., Agarwal, V. K., Pandey, R. K., & Behera, N. (2020). Experimental study and Shannon entropy analysis of pressure fluctuations and flow mode transition in fluidized dense phase pneumatic conveying of fly ash. Particuology, 49, 169-178. https://doi.org/10.1016/j.partic.2019.03.003

Experimental study and Shannon entropy analysis of pressure fluctuations and flow mode transition in fluidized dense phase pneumatic conveying of fly ash

Yassin Alkassar ^a *, Vijay K. Agarwal ^a, R.K. Pandey ^b, Niranjana Behera^c

a Industrial Tribology, Machine Dynamic and Maintenance Engineering Centre, Indian Institute of Technology Delhi, New Delhi 110016, India
b Department of Mechanical Engineering, Indian Institute of Technology Delhi, New Delhi 110016, India
c School of Mechanical Engineering, Vellore Institute of Technology University, Vellore 632014, India

10.1016/j.partic.2019.03.003

Volume 49, April 2020, Pages 169-178

Received 27 November 2018, Revised 11 March 2019, Accepted 25 March 2019, Available online 3 July 2019, Version of Record 26 February 2020.

E-mail: engyassin12@gmail.com

Highlights

• Pressure fluctuations in dense-phase flow are studied using Shannon entropy.

• Effect of conveying parameters on Shannon entropy is presented.

• Effect of specific power consumption on Shannon entropy is investigated.

• Location of transition in the mode of flow is assessed.

Abstract

The objective of this study was to relate experimental pressure fluctuation behavior to the transition in mode of flow observed in fluidized dense phase pneumatic conveying of fly ash. Shannon entropy and wavelet analysis were utilized to extract features of the flow regimes. Daubechies db4 wavelet analysis of pulsating air pressure revealed that the flow mechanism of fly ash in a fluidized dense phase possessed non-steady characteristics associated with gradual aeration of dunes along the direction of flow. Variations of Shannon entropy values along the length of the pipeline were assessed to determine the location at which the flow converted from dense to dilute phase mode. The effects of conveying parameters and specific power consumption on Shannon entropy and variations of the local power consumption coefficient are discussed.

Graphical abstract

Keywords

Fluidized dense phase; Mode transition; Wavelet; Shannon entropy

文章导读