Particle motion and enrichment behavior of dense granular impinging-jets generated by the nozzle with rectangular orifice--颗粒学报PARTICUOLOGY

Li, T., Lin, Q., Liu, H., Wang, S., & Li, W. (2025). Particle motion and enrichment behavior of dense granular impinging-jets generated by the nozzle with rectangular orifice. Particuology, 96, 312-327. https://doi.org/10.1016/j.partic.2024.11.014

Particle motion and enrichment behavior of dense granular impinging-jets generated by the nozzle with rectangular orifice

Ting Li^a, Qingguo Lin^b, Haokun Liu^a, Shengju Wang^a, Weifeng Li^{a *}

a National Energy Coal Gasification Technology Research and Development Center, Shanghai Engineering Research Center of Coal Gasification, Engineering Research Center of Resource Utilization of Carbon-containing Waste with Carbon Neutrality, Ministry of Education, East China University of Science and Technology, Shanghai, 200237, China
b Shanghai Engineering Research Center of Space Engine, Shanghai Institute of Space Propulsion, Shanghai, 201112, China

10.1016/j.partic.2024.11.014

January 2025, January 2025, Pages 312-327

Received 29 July 2024, Revised 14 October 2024, Accepted 21 November 2024, Available online 5 December 2024, Version of Record 12 December 2024.

E-mail: liweif@ecust.edu.cn

Highlights

• Formation and evolution of granular sheet generated by granular jet impingement.

• Circumferential distribution of granular sheet concentration is trimodal pattern.

• Core region with low velocity extends along horizontal and vertical directions.

Abstract

Particle motion regime and enrichment behavior of dense granular impinging-jets formed by the nozzle with rectangular orifice are experimentally and numerically investigated. Two impingement patterns are identified, including long and short parallel patterns. Particles enrich in the central axis of the granular sheet when two jets impinge with the long axes parallel pattern. While at the short axes parallel pattern, particles generate two symmetrical enriched streams. The angle of particle-enriched streams is observed to increase with increasing angle of two impinging-jets and decreasing aspect ratio of the nozzle orifice. The particle image velocity (PIV) analysis results demonstrate that the circumferential distribution of the particle velocity on the granular sheet follows the Gaussian distribution. With the formation of particle-enriched streams, the concentration distribution of the particle evolves into a trimodal pattern. Results of the discrete element method (DEM) indicate that the core region with low velocity within the impact zone of impinging-jets generated by using two nozzles with rectangular orifices extends into a shuttle shape. The core region develops and extends along the horizontal (or vertical) directions at long (or short) axes impingement pattern, thereby, affecting the enrichment behavior of particles.

Graphical abstract

Keywords

Dense granular impinging-jet; Enrichment behavior; Rectangular orifice

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