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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Main Authors: Chenliang Li, A-Man Zhang, Shiping Wang, Pu Cui
Format: Article
Language:English
Published: AIP Publishing LLC 2018-01-01
Series:AIP Advances
Online Access:http://dx.doi.org/10.1063/1.5013244
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spelling 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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