Experimental and simulation studies on the capture of micro-particles by a single droplet

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-03-17 DOI:10.1016/j.powtec.2025.120937

Jun Xie, Lijuan Hou, Qiang Ma, Yanchen Li, Jinlin Bian, Rundong Li

{"title":"Experimental and simulation studies on the capture of micro-particles by a single droplet","authors":"Jun Xie, Lijuan Hou, Qiang Ma, Yanchen Li, Jinlin Bian, Rundong Li","doi":"10.1016/j.powtec.2025.120937","DOIUrl":null,"url":null,"abstract":"<div><div>Coal, as a principal fossil energy source, occupies a crucial role in the global energy landscape. Nevertheless, the fine particles generated during the combustion of coal have exerted severe negative influences on human health, air visibility, and equipment safety. This paper focuses on wet flue gas desulfurization and collaborative dust removal technology as the research context. High-speed photography technology was employed to record the motion behavior of silica (SiO<sub>2</sub>) particles impacting deionized water, thereby the suspension/sinking phase diagram of the particles was obtained, and a fitting relationship between the particle size and the critical sinking velocity was established. The relationship was employed as the boundary condition and integrated with the Discrete Phase Model (DPM) in Computational Fluid Dynamics (CFD), and then the capture efficiency of micron-sized particles depositing onto the surface of liquid droplets was studied quantitatively. Moreover, the deposition distribution was explored by developing User Defined Functions (UDF). Finally, the influence of parameters such as particle sphericity, droplet diameter, airflow velocity, temperature difference, and droplet deformation rate on the capture efficiency, deposition distribution, and capture mechanism was elucidated, thereby providing theoretical support for the efficient removal of fine particles.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"457 ","pages":"Article 120937"},"PeriodicalIF":4.5000,"publicationDate":"2025-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Powder Technology","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0032591025003328","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}

引用次数: 0

Abstract

Coal, as a principal fossil energy source, occupies a crucial role in the global energy landscape. Nevertheless, the fine particles generated during the combustion of coal have exerted severe negative influences on human health, air visibility, and equipment safety. This paper focuses on wet flue gas desulfurization and collaborative dust removal technology as the research context. High-speed photography technology was employed to record the motion behavior of silica (SiO₂) particles impacting deionized water, thereby the suspension/sinking phase diagram of the particles was obtained, and a fitting relationship between the particle size and the critical sinking velocity was established. The relationship was employed as the boundary condition and integrated with the Discrete Phase Model (DPM) in Computational Fluid Dynamics (CFD), and then the capture efficiency of micron-sized particles depositing onto the surface of liquid droplets was studied quantitatively. Moreover, the deposition distribution was explored by developing User Defined Functions (UDF). Finally, the influence of parameters such as particle sphericity, droplet diameter, airflow velocity, temperature difference, and droplet deformation rate on the capture efficiency, deposition distribution, and capture mechanism was elucidated, thereby providing theoretical support for the efficient removal of fine particles.

Abstract Image

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.