scholarly journals Phenomenology of bubble-collapse-driven penetration of biomaterial-surrogate liquid-liquid interfaces

2018 ◽  
Vol 3 (11) ◽  
Author(s):  
Shucheng Pan ◽  
Stefan Adami ◽  
Xiangyu Hu ◽  
Nikolaus A. Adams
Keyword(s):  
Bubble Collapse ◽  
Liquid Interfaces

scholarly journals Numerical Study of the Collapse of Multiple Bubbles and the Energy Conversion during Bubble Collapse

Water ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 247 ◽  
Author(s):  
Jing Zhang ◽  
Lingxin Zhang ◽  
Jian Deng
Keyword(s):  
Energy Conversion ◽  
Conversion Rate ◽  
Focal Point ◽  
Numerical Study ◽  
Solid Wall ◽  
Bubble Collapse ◽  
Liquid Interfaces ◽  
Acoustic Damping ◽  
Multiple Bubbles ◽  
Peak Value

This paper investigates numerically the collapses of both a single cavitation bubble and a cluster consisting of 8 bubbles, concerning mainly on the conversions between different forms of energy. Direct numerical simulation (DNS) with volume of fluid (VOF) method is applied, considering the detailed resolution of the vapor-liquid interfaces. First, for a single bubble near a solid wall, we find that the peak value of the wave energy, or equivalently the energy conversion rate decreases when the distance between the bubble and the wall is reduced. However, for the collapses of multiple bubbles, this relationship between the bubble-wall distance and the conversion rate reverses, implying a distinct physical mechanism. The evolutions of individual bubbles during the collapses of multiple bubbles are examined. We observe that when the bubbles are placed far away from the solid wall, the jetting flows induced by all bubbles point towards the cluster centre, while the focal point shifts towards the solid wall when the cluster is very close to the wall. We note that it is very challenging to consider thermal and acoustic damping mechanisms in the current numerical methods, which might be significant contributions to the energy budget, and we leave it open to the future studies.

Fluctuation Analysis of Liquid/Liquid and Gel/Liquid Interfaces

1989 ◽  
Author(s):  
Vladimir Marecek ◽  
Miklos Gratzl ◽  
Angras Pungor ◽  
Jiri Janata
Keyword(s):  
Fluctuation Analysis ◽  
Liquid Interfaces

Multiple interactions in riverine biofilms - surfactant adsorption, bacterial attachment and biodegradation

1995 ◽  
Vol 31 (1) ◽  
pp. 61-70 ◽  
Author(s):  
Graham F. White
Keyword(s):  
Organic Pollutants ◽  
Bacterial Attachment ◽  
Solid Surfaces ◽  
Sediment Surface ◽  
Liquid Interfaces ◽  
Polluted Soils ◽  
Biofilm Bacteria ◽  
The Impact ◽  
Multiple Interactions

Many organic pollutants, especially synthetic surfactants, adsorb onto solid surfaces in natural and engineered aquatic environments. Biofilm bacteria on such surfaces make major contributions to microbial heterotrophic activity and biodegradation of organic pollutants. This paper reviews evidence for multiple interactions between surfactants, biodegradative bacteria, and sediment-liquid interfaces. Biodegradable surfactants e.g. SDS, added to a river-water microcosm were rapidly adsorb to sediment surface and stimulated the indigenous bacteria to attach to the sediment particles. Recalcitrant surfactants and non-surfactant organic nutrients did not stimulate attachment Attachment of bacteria was maximal when biodegradation was fastest, and was reversed when biodegradation was complete. Dodecanol, the primary product of SDS-biodegradation, markedly stimulated attachment. When SDS was added to suspensions containing sediment and either known degraders or known non-degraders, only the degraders became attached, and attachment accelerated surfactant biodegradation to dodecanol. These cyclical cooperative interactions have implications for the design of biodegradability-tests, the impact of surfactant adjuvants on biodegradability of herbicides/pesticides formulated with surfactants, and the role of surfactants used to accelerate bioremediation of hydrocarbon-polluted soils.

Microwave Measurement of Magnetic Bubble Collapse and Stripout Field

1976 ◽  
Author(s):  
Millard G. Mier ◽  
Hilmer W. S. Swenson ◽  
P. E. Wigen
Keyword(s):  
Bubble Collapse ◽  
Microwave Measurement ◽  
Magnetic Bubble

Open, Microfluidic Flow Cell for Studies of Interfacial Processes at Gas−Liquid Interfaces

2006 ◽  
Vol 78 (5) ◽  
pp. 1657-1664 ◽  
Author(s):  
Khanh C. Hoang ◽  
Dmitry Malakhov ◽  
William E. Momsen ◽  
Howard L. Brockman
Keyword(s):  
Flow Cell ◽  
Liquid Interfaces ◽  
Interfacial Processes ◽  
Microfluidic Flow
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