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|a 10.1021/acs.langmuir.2c01891
|2 doi
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|a eng
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|a Vara Prasad, Gudlavalleti V V S
|e verfasserin
|4 aut
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|a Augmenting the Leidenfrost Temperature of Droplets via Nanobubble Dispersion
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|c 2022
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 27.12.2022
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|a Date Revised 03.01.2023
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a Droplets may rebound/levitate when deposited over a hot substrate (beyond a critical temperature) due to the formation of a stable vapor microcushion between the droplet and the substrate. This is known as the Leidenfrost phenomenon. In this article, we experimentally allow droplets to impact the hot surface with a certain velocity, and the temperature at which droplets show the onset of rebound with minimal spraying is known as the dynamic Leidenfrost temperature (TDL). Here we propose and validate a novel paradigm of augmenting the TDL by employing droplets with stable nanobubbles dispersed in the fluid. In this first-of-its-kind report, we show that the TDL can be delayed significantly by the aid of nanobubble-dispersed droplets. We explore the influence of the impact Weber number (We), the Ohnesorge number (Oh), and the role of nanobubble concentration on the TDL. At a fixed impact velocity, the TDL was noted to increase with the increase in nanobubble concentration and decrease with an increase in impact velocity for a particular nanobubble concentration. Finally, we elucidated the overall boiling behaviors of nanobubble-dispersed fluid droplets with the substrate temperature in the range of 150-400 °C against varied impact We through a detailed phase map. These findings may be useful for further exploration of the use of nanobubble-dispersed fluids in high heat flux and high-temperature-related problems and devices
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|a Journal Article
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|a Sharma, Harsh
|e verfasserin
|4 aut
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|a Nirmalkar, Neelkanth
|e verfasserin
|4 aut
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|a Dhar, Purbarun
|e verfasserin
|4 aut
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|a Samanta, Devranjan
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 38(2022), 51 vom: 27. Dez., Seite 15925-15936
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:38
|g year:2022
|g number:51
|g day:27
|g month:12
|g pages:15925-15936
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|u http://dx.doi.org/10.1021/acs.langmuir.2c01891
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