Correction - Mass Transfer between Solid Wall and Fluid Streams

Lin, C. B.

doi:10.1021/ie50522a055

Cited by 40 publications

(40 citation statements)

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“…14 is believed to be a general result applicable to all fluids and boundary geometries (Chapman and Kuhn 1986). Equation 14 compares favorably with the empirical expression z++ = (~+/14.5)~ found by Lin et al (1953) to apply in the region z, 5 5 over smooth surfaces. Levich ( 1962) derived a similar closure for the viscous sublayer based on conventional mixing-length arguments.…”

Section: G2mentioning

confidence: 58%

Near‐bed turbulence and hydrodynamic control of diffusional mass transfer at the sea floor

Dade

1993

Limnology & Oceanography

136

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A simple closure scheme for turbulent transport yields mean-velocity and dissolved-substance concentration profiles just above and solute fluxes across a sediment-water interface underlying uniform, steady flow. In the case of near-bed turbulence characterization, this approach retains both turbulent and viscous terms in expressions for important structural aspects of the near-bed regions of turbulent boundary layers. Moreover, a modified turbulent kinetic energy balance is used to define eddy viscosity in the viscousdominated region of flow very near the bed. In the case of characterization of mass distribution and diffusional transfer rate, the approach partitions important factors that control mass transfer rate: nearbed turbulent transport, interfacial-flux boundary condition, and reaction kinetics. Diffusive sublayers overlying smooth beds exposed to typical deep-sea conditions are predicted to be -1 mm thick, a result in agreement with the sublayer thickness observed in situ and the inferred thickness used in many hydrodynamic models. One application of the new closure scheme indicates that typical biogenic roughness in fine-sediment marine environments enhances solute exchange rates threefold over those expected for a smooth bed. This increase is due to enhanced turbulent transport in the vicinity of the rough bed and occurs in spite of viscous ponding of "dead water" among roughness elements.

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Section: G2mentioning

confidence: 58%

Near‐bed turbulence and hydrodynamic control of diffusional mass transfer at the sea floor

Dade

1993

Limnology & Oceanography

136

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“…BNWL-57S Equation (25) now becomes (32) We simplify the equation by setting the time derivative eq'Jal to zero by observing the concentration at a fixed location at steady flow. Thus,…”

Section: Concentration Distribution In Turbulent Flowmentioning

confidence: 99%

Aerosol Deposition From Turbulent Airstreams in Vertical Conduits.

Sehmel¹

1968

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BNWL-578The general equations of continuity are set up to describe deposition of particles in which the eddy diffusi vity is related to the Reynolds stress. Simplifying assumptions in the general equations as well as simplifying assumptions to obtain a workable model are discussed. The general equations are used as a basis from which to discuss existing models of turbulent deposition. A model is being developed for the case of deposition in tubes. Deposition velocities are shown using the initial assumptions for solving the model.

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“…However, this simplification, which was developed as an analogy for heat transfer (Levich 1962), can be confusing since DBLs are typically defined by the momentum BL rather than through measurements of the distribution of scalar quantities (Hondzo et al 2005). By analogy, a concentration boundary layer (CBL) forms when there is a concentration gradient between the surface of the organism (which is a source or a sink of the scalar) and the bulk water (Lin et al 1953, Kader 1981. It is relevant to note that a CBL can exist in stagnant water for time periods less than the time necessary for diffusion to eliminate the gradient.…”

mentioning

confidence: 99%

“…However, in aquatic environments, the Schmidt numbers (Sc = v/D ) are much greater than one, and so the shape of the momentum BL and CBL do not coincide close to the surface. Therefore, even though K v is dampened by v in the VSL, K v can still influence scalar distributions near the surface because K v ≈ K D > D (Lin et al 1953, Bird et al 2002, Hondzo et al 2005). Thus, due to the influence of the momentum BL, the CBL can also take on some horizontal and vertical structure (Schlichting andGersten 2000, Bird et al 2002).…”

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confidence: 99%

On the determination of mass transfer in a concentration boundary layer

Nishihara¹,

Ackerman

2007

Limnology & Ocean Methods

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The mass transfer of scalar quantities (e.g., O 2 and nutrients) in aquatic environments is an important and complex process involving diffusion and advection. In a flowing environment, concentration boundary layers (CBL) occur above the surfaces of organisms when they are a sink or source of scalars. In this study, we used an O 2 microsensor to profile the O 2 concentrations in the CBL above photosynthesizing freshwater macrophyte (Vallisneria americana) leaves that were oriented parallel to the flow in a recirculating flow chamber at 0.5 and 3.3 cm s -1

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Correction - Mass Transfer between Solid Wall and Fluid Streams

Cited by 40 publications

References 0 publications

Near‐bed turbulence and hydrodynamic control of diffusional mass transfer at the sea floor

Near‐bed turbulence and hydrodynamic control of diffusional mass transfer at the sea floor

Aerosol Deposition From Turbulent Airstreams in Vertical Conduits.

On the determination of mass transfer in a concentration boundary layer

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