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Effects of eddy shocklets on the segregation and evaporation of droplets in highly compressible shear layers

Zhaoxin Ren Orcid Logo, Bing Wang, Fan Zhang, Longxi Zheng Orcid Logo

AIP Advances, Volume: 9, Issue: 12, Start page: 125101

Swansea University Author: Zhaoxin Ren Orcid Logo

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DOI (Published version): 10.1063/1.5125121

Abstract

Numerical studies of droplet-laden spatially developing shear layers are conducted with a high convective Mach number (Mc = 1.0), in which a high-order hybrid weighted essentially nonoscillatory scheme is used for the turbulence as well as shock capturing. The evaporating droplets are tracked as poi...

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Published in: AIP Advances
ISSN: 2158-3226
Published: AIP Publishing 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa59350
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spelling 2022-02-23T14:46:57.6825554 v2 59350 2022-02-11 Effects of eddy shocklets on the segregation and evaporation of droplets in highly compressible shear layers 62a1a0da0fa78e05c3deafcdee5551ce 0000-0002-6305-9515 Zhaoxin Ren Zhaoxin Ren true false 2022-02-11 AERO Numerical studies of droplet-laden spatially developing shear layers are conducted with a high convective Mach number (Mc = 1.0), in which a high-order hybrid weighted essentially nonoscillatory scheme is used for the turbulence as well as shock capturing. The evaporating droplets are tracked as point mass in the Lagrangian manner, and the two-way coupling between the flow and droplets is considered by adding the source terms to the governing equations of the gas-phase. This research focuses on the preferential concentration of droplets and the interactions between droplets and eddy shocklets in the shear layers with high flow compressibility and analyzes the underlying mechanisms of momentum and thermal response behaviors of droplets to eddy shocklets. The segregation of droplets exhibits the strongest spatial preference in the highly compressible shearing vortices, and droplets tend to accumulate as stripes behind the shocklets, associated with the coherent structures. The high flow compressibility results in the strong spatiotemporal variations of pressure and temperature, and the distributions of the expansion zones with low temperature and the compression zones with high temperature occur alternately in the shear layer. The relaxation response behaviors of the droplets to the change of momentum and thermal features of the surrounding carrier gas result in the delay of droplet evaporation in the high temperature region and then the enhancement of droplet-vapors in the low temperature region. The present observations can be ascribed to the interactions between the dispersed droplets and the distributed eddy shocklets in the shear flows with high compressibility. Journal Article AIP Advances 9 12 125101 AIP Publishing 2158-3226 2 12 2019 2019-12-02 10.1063/1.5125121 COLLEGE NANME Aerospace Engineering COLLEGE CODE AERO Swansea University This research was partially supported by the National Natural Science Foundation of China (Grant Nos. 51676111, 51806179, and NSAF.U1730104), the project funded by the China Postdoctoral Science Foundation, the Fundamental Research Funds for the Central Universities, and the National Science and Technology Major Project (No. 2017-III-0005-0030). 2022-02-23T14:46:57.6825554 2022-02-11T01:06:43.3257700 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Aerospace Engineering Zhaoxin Ren 0000-0002-6305-9515 1 Bing Wang 2 Fan Zhang 3 Longxi Zheng 0000-0002-6583-559x 4 59350__22441__78540af795214c3f894e9711cb3a5967.pdf 59350.pdf 2022-02-23T14:46:12.6269728 Output 3382127 application/pdf Version of Record true © 2019 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license true eng http://creativecommons.org/licenses/by/4.0/
title Effects of eddy shocklets on the segregation and evaporation of droplets in highly compressible shear layers
spellingShingle Effects of eddy shocklets on the segregation and evaporation of droplets in highly compressible shear layers
Zhaoxin Ren
title_short Effects of eddy shocklets on the segregation and evaporation of droplets in highly compressible shear layers
title_full Effects of eddy shocklets on the segregation and evaporation of droplets in highly compressible shear layers
title_fullStr Effects of eddy shocklets on the segregation and evaporation of droplets in highly compressible shear layers
title_full_unstemmed Effects of eddy shocklets on the segregation and evaporation of droplets in highly compressible shear layers
title_sort Effects of eddy shocklets on the segregation and evaporation of droplets in highly compressible shear layers
author_id_str_mv 62a1a0da0fa78e05c3deafcdee5551ce
author_id_fullname_str_mv 62a1a0da0fa78e05c3deafcdee5551ce_***_Zhaoxin Ren
author Zhaoxin Ren
author2 Zhaoxin Ren
Bing Wang
Fan Zhang
Longxi Zheng
format Journal article
container_title AIP Advances
container_volume 9
container_issue 12
container_start_page 125101
publishDate 2019
institution Swansea University
issn 2158-3226
doi_str_mv 10.1063/1.5125121
publisher AIP Publishing
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Aerospace Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Aerospace Engineering
document_store_str 1
active_str 0
description Numerical studies of droplet-laden spatially developing shear layers are conducted with a high convective Mach number (Mc = 1.0), in which a high-order hybrid weighted essentially nonoscillatory scheme is used for the turbulence as well as shock capturing. The evaporating droplets are tracked as point mass in the Lagrangian manner, and the two-way coupling between the flow and droplets is considered by adding the source terms to the governing equations of the gas-phase. This research focuses on the preferential concentration of droplets and the interactions between droplets and eddy shocklets in the shear layers with high flow compressibility and analyzes the underlying mechanisms of momentum and thermal response behaviors of droplets to eddy shocklets. The segregation of droplets exhibits the strongest spatial preference in the highly compressible shearing vortices, and droplets tend to accumulate as stripes behind the shocklets, associated with the coherent structures. The high flow compressibility results in the strong spatiotemporal variations of pressure and temperature, and the distributions of the expansion zones with low temperature and the compression zones with high temperature occur alternately in the shear layer. The relaxation response behaviors of the droplets to the change of momentum and thermal features of the surrounding carrier gas result in the delay of droplet evaporation in the high temperature region and then the enhancement of droplet-vapors in the low temperature region. The present observations can be ascribed to the interactions between the dispersed droplets and the distributed eddy shocklets in the shear flows with high compressibility.
published_date 2019-12-02T04:16:35Z
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score 11.013148

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