Computational and experimental investigations on the evaporation of single and multiple elongated droplets
Although droplet evaporation has been studied extensively, the focus is mostly limited to single spherical drops rather than elongated or multiple droplets, which is extensively encountered in a wide range of applications. The present study provides, for the first time, an experimental investigation...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-05-01
|
| Series: | Chemical Engineering Journal Advances |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666821122000163 |
| _version_ | 1818050598299238400 |
|---|---|
| author | Akam Aboubakri Yigit Akkus Abdolali K Sadaghiani Khellil Sefiane Ali Koşar |
| author_facet | Akam Aboubakri Yigit Akkus Abdolali K Sadaghiani Khellil Sefiane Ali Koşar |
| author_sort | Akam Aboubakri |
| collection | DOAJ |
| description | Although droplet evaporation has been studied extensively, the focus is mostly limited to single spherical drops rather than elongated or multiple droplets, which is extensively encountered in a wide range of applications. The present study provides, for the first time, an experimental investigation on the evaporation of high aspect ratio elongated droplets. In addition, a fully coupled model is developed and validated against the experimental observations. The model is extended to provide a fully coupled analysis of adjacent droplets. The model considers all instabilities in both liquid and gas phases. The results indicate that the dynamics of droplet evaporation dramatically changes with droplet size, shape, and distance between adjacent droplets. Therefore, a non-dimensional pitch distance (L/D) is introduced to investigate the velocity fields in the droplets and gas domains as well as the temperature map at the interface of the droplets. While previous studies stated that the side droplets have higher evaporation rates compared to their central counterparts, and depending on the strength of natural convection their evaporation rate may exceed a single droplet, it is revealed in this study that besides the effect of natural convection, the evaporation rate of the high aspect ratio elongated side droplets becomes larger than that of a single one in the absence of Marangoni flow. Also in the presence of Marangoni flow, the side elongated droplets possess evaporation rates smaller than their central counterpart, and the evaporation rate of both central and side droplets becomes smaller than a single droplet. |
| first_indexed | 2024-12-10T10:56:01Z |
| format | Article |
| id | doaj.art-7aa746841ccf409789bdb3704ca7b4ff |
| institution | Directory Open Access Journal |
| issn | 2666-8211 |
| language | English |
| last_indexed | 2024-12-10T10:56:01Z |
| publishDate | 2022-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Chemical Engineering Journal Advances |
| spelling | doaj.art-7aa746841ccf409789bdb3704ca7b4ff2022-12-22T01:51:52ZengElsevierChemical Engineering Journal Advances2666-82112022-05-0110100255Computational and experimental investigations on the evaporation of single and multiple elongated dropletsAkam Aboubakri0Yigit Akkus1Abdolali K Sadaghiani2Khellil Sefiane3Ali Koşar4Faculty of Engineering and Natural Sciences (FENS), Sabanci University, Orhanli, 34956, Tuzla, Istanbul, Turkey; Sabanci University Nanotechnology and Application Center (SUNUM), Sabanci University, Orhanli, 34956, Tuzla, Istanbul, TurkeyASELSAN Inc., 06200, Yenimahalle, Ankara, TurkeyFaculty of Engineering and Natural Sciences (FENS), Sabanci University, Orhanli, 34956, Tuzla, Istanbul, Turkey; Sabanci University Nanotechnology and Application Center (SUNUM), Sabanci University, Orhanli, 34956, Tuzla, Istanbul, Turkey; Center of Excellence for Functional Surfaces and Interfaces for Nano-Diagnostics (EFSUN), Sabanci University, Orhanli, 34956, Tuzla, Istanbul, Turkey; Corresponding authors.School of Engineering, University of Edinburgh, Edinburgh EH8 9YL, United KingdomFaculty of Engineering and Natural Sciences (FENS), Sabanci University, Orhanli, 34956, Tuzla, Istanbul, Turkey; Sabanci University Nanotechnology and Application Center (SUNUM), Sabanci University, Orhanli, 34956, Tuzla, Istanbul, Turkey; Center of Excellence for Functional Surfaces and Interfaces for Nano-Diagnostics (EFSUN), Sabanci University, Orhanli, 34956, Tuzla, Istanbul, Turkey; Corresponding authors.Although droplet evaporation has been studied extensively, the focus is mostly limited to single spherical drops rather than elongated or multiple droplets, which is extensively encountered in a wide range of applications. The present study provides, for the first time, an experimental investigation on the evaporation of high aspect ratio elongated droplets. In addition, a fully coupled model is developed and validated against the experimental observations. The model is extended to provide a fully coupled analysis of adjacent droplets. The model considers all instabilities in both liquid and gas phases. The results indicate that the dynamics of droplet evaporation dramatically changes with droplet size, shape, and distance between adjacent droplets. Therefore, a non-dimensional pitch distance (L/D) is introduced to investigate the velocity fields in the droplets and gas domains as well as the temperature map at the interface of the droplets. While previous studies stated that the side droplets have higher evaporation rates compared to their central counterparts, and depending on the strength of natural convection their evaporation rate may exceed a single droplet, it is revealed in this study that besides the effect of natural convection, the evaporation rate of the high aspect ratio elongated side droplets becomes larger than that of a single one in the absence of Marangoni flow. Also in the presence of Marangoni flow, the side elongated droplets possess evaporation rates smaller than their central counterpart, and the evaporation rate of both central and side droplets becomes smaller than a single droplet.http://www.sciencedirect.com/science/article/pii/S2666821122000163Droplet evaporationAdjacency effectMarangoni flowNatural convectionInterfacial transportMultiple elongated droplets |
| spellingShingle | Akam Aboubakri Yigit Akkus Abdolali K Sadaghiani Khellil Sefiane Ali Koşar Computational and experimental investigations on the evaporation of single and multiple elongated droplets Chemical Engineering Journal Advances Droplet evaporation Adjacency effect Marangoni flow Natural convection Interfacial transport Multiple elongated droplets |
| title | Computational and experimental investigations on the evaporation of single and multiple elongated droplets |
| title_full | Computational and experimental investigations on the evaporation of single and multiple elongated droplets |
| title_fullStr | Computational and experimental investigations on the evaporation of single and multiple elongated droplets |
| title_full_unstemmed | Computational and experimental investigations on the evaporation of single and multiple elongated droplets |
| title_short | Computational and experimental investigations on the evaporation of single and multiple elongated droplets |
| title_sort | computational and experimental investigations on the evaporation of single and multiple elongated droplets |
| topic | Droplet evaporation Adjacency effect Marangoni flow Natural convection Interfacial transport Multiple elongated droplets |
| url | http://www.sciencedirect.com/science/article/pii/S2666821122000163 |
| work_keys_str_mv | AT akamaboubakri computationalandexperimentalinvestigationsontheevaporationofsingleandmultipleelongateddroplets AT yigitakkus computationalandexperimentalinvestigationsontheevaporationofsingleandmultipleelongateddroplets AT abdolaliksadaghiani computationalandexperimentalinvestigationsontheevaporationofsingleandmultipleelongateddroplets AT khellilsefiane computationalandexperimentalinvestigationsontheevaporationofsingleandmultipleelongateddroplets AT alikosar computationalandexperimentalinvestigationsontheevaporationofsingleandmultipleelongateddroplets |