Viscous influences on impulsively generated focused jets
Cheng, Xianggang and Chen, Xiao-Peng and Ding, Hang and Zhang, Chun-Yu and Hu, Haibao and Jia, Laibing (2024) Viscous influences on impulsively generated focused jets. Physical Review Fluids, 9 (8). L082001. ISSN 2469-990X (https://doi.org/10.1103/PhysRevFluids.9.L082001)
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Abstract
Impulsively generated focused jets play a significant role in various applications, including inkjet printing, needle-free drug delivery, and microfluidic devices. As the demand for generating jets and droplets from medium to highly viscous liquids increases, understanding the role of viscosity in jetting dynamics becomes crucial. While previous studies have examined the viscous effects on walls, the impact on free surfaces has not been thoroughly understood. This study aims to bridge this gap by integrating experiments with numerical simulations to investigate the viscous effects on focused jet formation. We demonstrate that mass and momentum transfer along the tangential direction of the free surface contribute to focused jet formation, and viscosity plays a key role in this transfer process. The viscosity-induced diffusion of the shear flow and vorticity near the free surface reduces the jet speed. Based on experimental observations and simulation results, we propose an equation to predict the viscous jet velocity. These findings offer new perspectives on viscous interface dynamics in advanced manufacturing and biomedical applications.
ORCID iDs
Cheng, Xianggang, Chen, Xiao-Peng, Ding, Hang, Zhang, Chun-Yu, Hu, Haibao and Jia, Laibing ORCID: https://orcid.org/0000-0003-1327-5516;-
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Item type: Article ID code: 90177 Dates: DateEvent23 August 2024Published5 August 2024Accepted11 March 2024SubmittedSubjects: Technology > Hydraulic engineering. Ocean engineering
Technology > Mechanical engineering and machineryDepartment: Faculty of Engineering > Naval Architecture, Ocean & Marine Engineering Depositing user: Pure Administrator Date deposited: 07 Aug 2024 14:33 Last modified: 01 Oct 2024 13:28 URI: https://strathprints.strath.ac.uk/id/eprint/90177