Samuel J, J., Mullis, A.M. orcid.org/0000-0001-5812-5226 and Borman, D.J. orcid.org/0000-0002-8421-2582 (2024) CFD modelling of Close-Coupled Gas Atomisation (CCGA) process by employing the Euler-Lagrange approach to understand melt flow instabilities. Chemical Engineering Science, 295. 120205. ISSN 0009-2509
Abstract
This paper presents a CFD analysis of the melt and flow-field instabilities in a close-coupled gas atomisation process (CCGA) caused by the gas–melt interactions. The melt mass flow is coupled to the atomiser internal pressure, which varies over time due to the unsteady flow field. A two-phase flow of Argon gas and melt particles is modelled using a coupled Euler-Lagrange framework. Three different initial gas-to-melt ratios (GMRs) of 5.5, 2.6 and 1.32 are considered to study the gas–melt interaction. The results show that in the case GMR = 1.32, sustained instability both in the melt and in the flow-field are distinctly observed, resembling physical atomisation process. This melt fluctuation corresponded to an alternating flow-field fluctuation; alternating between open- to closed-wake condition, where the local maxima of the melt corresponded to an open-wake condition, and the local minima of the melt corresponded to a closed-wake condition.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2024 The Author(s). This is an open access article under the terms of the Creative Commons Attribution License (CC-BY-NC 4.0), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited. |
Keywords: | Close-Coupled Gas Atomisation (CCGA); Computational Fluid Dynamics (CFD); Compressible flow; Discrete-Phase Model (DPM); Euler-Lagrange approach; User-Defined Function (UDF) |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Funding Information: | Funder Grant number EPSRC (Engineering and Physical Sciences Research Council) EP/P006566/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 10 Jun 2024 13:31 |
Last Modified: | 10 Jun 2024 13:31 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.ces.2024.120205 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:213212 |