Please use this identifier to cite or link to this item:
http://hdl.handle.net/2289/7616
Title: | Laser-driven Marangoni flow and vortex formation in a liquid droplet |
Authors: | Gupta, Krishnkumar Kolwankar, Kiran M. Dharmadhikari, Jayashree A. Gore, Bhalchandra Dharmadhikari, A.K. |
Issue Date: | Dec-2020 |
Publisher: | American Institute of Physics |
Citation: | Physics of Fluids, 2020, Vol.32, p121701 |
Abstract: | We present a systematic study of the laser-driven Marangoni flow and curvature induced vortex formation in a copper sulfate pentahydrate solution, visualized by dispersed carbon nanotube (CNT) bundles. The experiments are carried out using different objectives of numerical aperture (NA) in the range of 0.1ā0.6 to investigate the effect of focusing on the flow dynamics. The flow velocities measured (for 0.1 NA) are in the range of 2 mm/sā5 mm/s depending on the size of CNTs. Both primary and secondary vortices are observed in our experiment. In the primary vortex, with a sixfold increase in NA, a tenfold increase in the angular velocity of CNTs is measured. We also discuss the important role played by the curvature of the droplet in the vortex formation. The numerical simulations carried out for flow velocity are in agreement with the experimental values. |
Description: | Restricted Access |
URI: | http://hdl.handle.net/2289/7616 |
ISSN: | 1070-6631 1089-7666(Online) |
Alternative Location: | https://doi.org/10.1063/5.0025469 https://aip.scitation.org/doi/10.1063/5.0025469 |
Copyright: | 2020 American Institute of Physics |
Additional information: | Supplementary Information Avaliable |
Appears in Collections: | Research Papers (LAMP) |
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2020_Physics of Fluids_Vol.32_p121701.pdf Restricted Access | Restricted Access | 3.9 MB | Adobe PDF | View/Open Request a copy |
2020_Physics of Fluids_Vol.32_p121701_Supply Info.pdf Restricted Access | Restricted Access | 689.93 kB | Adobe PDF | View/Open Request a copy |
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