Knowledge Management System Of Institute of process engineering,CAS
| Modeling partition coefficient of liquid droplets impacting on particles by direct numerical simulation | |
| Wang, Jiayi1,2; Hua, Leina2; Yang, Ning2,3 | |
| 2022-05-18 | |
| Source Publication | CHEMICAL ENGINEERING SCIENCE
 |
| ISSN | 0009-2509 |
| Volume | 253Pages:8 |
| Abstract | Liquid partition coefficient, defined as the proportion of the liquid volume covered on particle surface to that in bulk phase, is a key parameter in the simulation of liquid-injected fluidized beds. To develop the sub-grid model for liquid partition coefficient as a function of local hydrodynamics, a two-dimensional Volume-of-Fluid (VOF) simulation was conducted to directly resolve droplets impinging, wetting and spreading on particles in a box. The model was first validated by the experiments in literature on the spreading diameter of a droplet impinging on a single particle. Then for a system of multiple droplets particles impinging, we investigated the effects of Weber number, droplet-to-particle (DTP) ratio and particle volume fraction on several characteristic parameters, e.g., ratio of liquid area adhered to particles to the total liquid area, liquid film thickness, the percentage of wetted particle surface area and liquid holdup. All these parameters decrease with increasing Weber number when We = 10 ti 370, and then gradually stabilize. Higher particle volume fraction increases the collisional frequency of droplets and particles, and therefore the ratio of liquid area adhered to particles to the total liquid area. By contrast, DTP is not the dominant factor in liquid partition. Finally a correlation for liquid partition coefficient is proposed as a function of droplet Weber number and particle volume fraction. It may serve as a sub grid model for CFD-DEM or multifluid models in simulation of large-scale liquid-injected fluidized beds.(c) 2022 Elsevier Ltd. All rights reserved. |
| Keyword | Fluidized bed Liquid spray VOF Liquid distribution |
| DOI | 10.1016/j.ces.2022.117553 |
| Language | 英语 |
| WOS Keyword | FLUIDIZED-BED ; CFD-DEM ; SURFACE ; DYNAMICS ; SPRAY ; CONTACT |
| Funding Project | National Natural Science Foundation of China[21925805] ; National Natural Science Foundation of China[22061130204] ; National Natural Science Foundation of China[91834303] ; Newton Advanced Fellowships of Royal Society[NAF\R1\201305] |
| WOS Research Area | Engineering |
| WOS Subject | Engineering, Chemical |
| Funding Organization | National Natural Science Foundation of China ; Newton Advanced Fellowships of Royal Society |
| WOS ID | WOS:000789635800007 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/53257 |
| Collection | 中国科学院过程工程研究所 |
| Corresponding Author | Yang, Ning |
| Affiliation | 1.Shenyang Univ Chem Technol, Sch Mech & Power Engn, Shenyang 110142, Peoples R China 2.Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, POB 353, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Wang, Jiayi,Hua, Leina,Yang, Ning. Modeling partition coefficient of liquid droplets impacting on particles by direct numerical simulation[J]. CHEMICAL ENGINEERING SCIENCE,2022,253:8. |
| APA | Wang, Jiayi,Hua, Leina,&Yang, Ning.(2022).Modeling partition coefficient of liquid droplets impacting on particles by direct numerical simulation.CHEMICAL ENGINEERING SCIENCE,253,8. |
| MLA | Wang, Jiayi,et al."Modeling partition coefficient of liquid droplets impacting on particles by direct numerical simulation".CHEMICAL ENGINEERING SCIENCE 253(2022):8. |
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