Sea surface chemistry and Langmuir circulation

Sutcliffe, W. H.; Baylor, Edward R.; Menzel, David W.

doi:10.1016/0011-7471(63)90359-0

Cited by 82 publications

(57 citation statements)

References 9 publications

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“…Because of its theoretical and practical importance, the motion of gas bubbles in liquids (e.g., air bubbles in water) has been actively studied (Levich 1962, 4 For small bubbles (I < lOOy = 10 _1+ m in water) the drag is viscous in nature and is given by -F v = -< n l u, (19) with k = 4tt for a perfectly clean bubble having a mobile two fluid interface at its surface. However, most liquids such as water contain "surface-active" materials that coat the bubble and destroy the mobility of this interface.…”

Section: B Drag On Gas Bubbles In a Liquidmentioning

confidence: 99%

“…However, most liquids such as water contain "surface-active" materials that coat the bubble and destroy the mobility of this interface. In this case the relative velocity of the transporting fluid goes to zero at the bubble's surface, and the bubble behaves like a solid sphere where drag is given by (19) with k = 6tt (Levich 1962, ft 70 and 81) .…”

Section: B Drag On Gas Bubbles In a Liquidmentioning

confidence: 99%

“…Up to the separation point resistance that acts on the bubble is viscous in nature with a contribution to the total drag given by (19) 20 with k = 12 tt. Past the separation point and into the bubble's wake the flow is characterized by turbulent notion with a contribution to the total drag given by (20) where K,.…”

Section: B Drag On Gas Bubbles In a Liquidmentioning

confidence: 99%

“…In the absence of surface active materials, s, is very small (s,^* 2 /R e for R > > 1) / so flow past the bubble is essentially unseparated and the drag is given by (19) with k = 12-rr. On the other hand, when an area s on the bubble is covered by a monolayer of surface-active material, the relative fluid velocity in this region is zero, and flow separation occurs there.…”

Section: B Drag On Gas Bubbles In a Liquidmentioning

confidence: 99%

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Bubble transport theory with application to the upper ocean

Garrettson

1973

J. Fluid Mech.

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ABSTRACT:The formalism of transport theory is adapted to a general description of bubble populations in a moving fluid. The bubble distribution, as a function of position, velocity, radius, and time, satisfies a Boltzmanntype transport equation that is derived and then formally solved by the method of characteristics. Before this new analytical tool can be applied, properties of the medium must be specified and a bubble dynamics model must be chosen. General expressions are written for bubble acceleration and radius change rate, and known models of bubble gas diffusion and drag are summarized for gas bubbles in liquids. Application to the upper ocean is discussed and then illustrated with seme sample calculations. Explicit solutions are written for a steadystate, one dimensional ocean with distributed sources; the results clarify relations between observed bubble populations, proposed bubble source mechanisms, and known models of single bubble dynamics.

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Section: B Drag On Gas Bubbles In a Liquidmentioning

confidence: 99%

Section: B Drag On Gas Bubbles In a Liquidmentioning

confidence: 99%

Section: B Drag On Gas Bubbles In a Liquidmentioning

confidence: 99%

Section: B Drag On Gas Bubbles In a Liquidmentioning

confidence: 99%

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Bubble transport theory with application to the upper ocean

Garrettson

1973

J. Fluid Mech.

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“…For instance, enrichment of colloid-associated heavy metals and organic compounds at the surface of oceans and lakes have been reported (1)(2)(3)(4). Clays, humic acids, and microorganisms have also been found preferentially sorbed at air-water interfaces in unsaturated soils (5)(6)(7)(8)(9).…”

Section: Introductionmentioning

confidence: 99%

Partitioning of Clay Colloids at Air–Water Interfaces

Wan

Tokunaga

2002

Journal of Colloid and Interface Science

123

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Colloid sorption onto air-water interfaces in a variety of natural environments has been previously recognized, but better quantification and understanding is still needed. Affinities of clay colloids for the air-water interface were measured using a bubble-column method and reported as partition coefficients (K). Four types of dilute clay suspensions were measured in NaCl solutions under varying pH and ionic strength conditions: kaolinite KGa-1, illite IMt-2, montmorillonite SWy-2, and bentonite. The K values of three types of polystyrene latex particles with different surface-charge properties were also measured for comparison. Kaolinite exhibited extremely high affinity to the air-water interface at pH values below 7. Illite has lower affinity to air-water interfaces than kaolinite, but has similar pH-dependence. Na-montmorillonite and bentonite clay were found excluded from the air-water interface at any given pH and ionic strength. Positively and negatively charged latex particles exhibited sorption and exclusion, respectively, at the air-water interface. These results show the importance of electrostatic interactions between the air-water interface and colloids, especially the influence of pHdependent edge charges, and influence of particle shape.

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