Formation and coalescence of nanobubbles under controlled gas concentration and species
Using molecular dynamics simulations, the effects of gas concentration and species on the coalescence and growth of nanobubbles were systematically investigated. With increasing gas concentration, not only surface nanobubbles but also bulk nanobubbles are formed. The bulk nanobubble in water is less...
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doaj-b250dbf2af0c4685a775f51e75fd7edd2020-11-25T00:23:29ZengAIP Publishing LLCAIP Advances2158-32262018-01-0181015104015104-910.1063/1.5013244010801ADVFormation and coalescence of nanobubbles under controlled gas concentration and speciesChenliang Li0A-Man Zhang1Shiping Wang2Pu Cui3College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, People’s Republic of ChinaCollege of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, People’s Republic of ChinaCollege of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, People’s Republic of ChinaCollege of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, People’s Republic of ChinaUsing molecular dynamics simulations, the effects of gas concentration and species on the coalescence and growth of nanobubbles were systematically investigated. With increasing gas concentration, not only surface nanobubbles but also bulk nanobubbles are formed. The bulk nanobubble in water is less explored so far. Here, its coalescence, stability, movement trajectory and velocity are discussed. A comparison of the motion and coalescence of the bulk nanobubble to the surface nanobubble, directly demonstrates that the three-phase contact line plays a crucial role for surface nanobubble stability. Compared with the bubble size, the distance between surface nanobubbles is a more important factor to decide the merging order among three nanobubbles. The study also shows that three factors including the oversaturated gas concentration, the distance between surface nanobubbles, and the stronger solid-gas interactions influence the formation of the gas-enrichment layer at the solid-liquid interface. The result has an important significance to enhancing the boundary slip due to the presence of nanobubbles.http://dx.doi.org/10.1063/1.5013244 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Chenliang Li A-Man Zhang Shiping Wang Pu Cui |
spellingShingle |
Chenliang Li A-Man Zhang Shiping Wang Pu Cui Formation and coalescence of nanobubbles under controlled gas concentration and species AIP Advances |
author_facet |
Chenliang Li A-Man Zhang Shiping Wang Pu Cui |
author_sort |
Chenliang Li |
title |
Formation and coalescence of nanobubbles under controlled gas concentration and species |
title_short |
Formation and coalescence of nanobubbles under controlled gas concentration and species |
title_full |
Formation and coalescence of nanobubbles under controlled gas concentration and species |
title_fullStr |
Formation and coalescence of nanobubbles under controlled gas concentration and species |
title_full_unstemmed |
Formation and coalescence of nanobubbles under controlled gas concentration and species |
title_sort |
formation and coalescence of nanobubbles under controlled gas concentration and species |
publisher |
AIP Publishing LLC |
series |
AIP Advances |
issn |
2158-3226 |
publishDate |
2018-01-01 |
description |
Using molecular dynamics simulations, the effects of gas concentration and species on the coalescence and growth of nanobubbles were systematically investigated. With increasing gas concentration, not only surface nanobubbles but also bulk nanobubbles are formed. The bulk nanobubble in water is less explored so far. Here, its coalescence, stability, movement trajectory and velocity are discussed. A comparison of the motion and coalescence of the bulk nanobubble to the surface nanobubble, directly demonstrates that the three-phase contact line plays a crucial role for surface nanobubble stability. Compared with the bubble size, the distance between surface nanobubbles is a more important factor to decide the merging order among three nanobubbles. The study also shows that three factors including the oversaturated gas concentration, the distance between surface nanobubbles, and the stronger solid-gas interactions influence the formation of the gas-enrichment layer at the solid-liquid interface. The result has an important significance to enhancing the boundary slip due to the presence of nanobubbles. |
url |
http://dx.doi.org/10.1063/1.5013244 |
work_keys_str_mv |
AT chenliangli formationandcoalescenceofnanobubblesundercontrolledgasconcentrationandspecies AT amanzhang formationandcoalescenceofnanobubblesundercontrolledgasconcentrationandspecies AT shipingwang formationandcoalescenceofnanobubblesundercontrolledgasconcentrationandspecies AT pucui formationandcoalescenceofnanobubblesundercontrolledgasconcentrationandspecies |
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