Detalhes da Transferência de Gases na Interface Ar-Água

Jirka, G. H.; Schulz, Harry Edmar; Janzen, Johannes Gérson

doi:10.21168/rbrh.v11n4.p153-161

Cited by 2 publications

(3 citation statements)

References 13 publications

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“…The studies of Refs. [3,4,6,8,10] also show RMS profiles with well-defined finite slopes at the origin. The study of Ref.…”

Section: Mathematical Modelsmentioning

confidence: 95%

“…Measurements of independent and of simultaneous instantaneous concentration and velocity fields close to the air-water interface may be found in the literature, as Refs. [3][4][5][6][7][8][9][10][11], for example. These measurements allow obtaining statistical parameters like mean concentration profiles, concentration RMS profiles and experimental estimates of turbulent mass fluxes.…”

Section: Introductionmentioning

confidence: 99%

“…These measurements allow obtaining statistical parameters like mean concentration profiles, concentration RMS profiles and experimental estimates of turbulent mass fluxes. When describing the used experimental optical techniques, different authors mention adjustments of the concentration measurements in the very near surface region, and interpolations for the velocity data, which have influences in the evaluation of the turbulent mass fluxes, for example, [4,[6][7][8]. Figure 2 illustrates schematically the obtainment of mean concentration fields from instantaneous data, together with a sketch of the thickness of the sublayers of Fig.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Turbulence aspects of mass transfer in the thin interfacial region of the concentration boundary layer in gas–liquid systems

Schulz¹,

Lavin²,

Gonçalves³

2017

Int. J. CMEM

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The quantification of overall mass transfers in gas-liquid systems depends on the spatial evolution of the relevant variables close to the interface of the two phases. When turbulence is present (in the present study the turbulence is considered in the liquid phase), the methods of treating the problem consider the differential form of the momentum and mass conservation equations. The continuous hypothesis that underlies these equations in principle allows verifying the limiting trends very close to the interface. Because the theoretical concepts of turbulence are defined using statistical tools, the mentioned verification depends on the intrinsic definitions used in the statistical approach. In this study the turbulent mass transfer parameters are calculated for the thin region close to the interface based on the tool of random square waves (RSW). Theoretical results are obtained and analyzed in the context of existing experimental data and conceptual discussions of the literature, using a constant 'reduction function', a parameter defined in this methodology. The results of the present analysis show that the RSW method allows obtaining functional trends, as well as indicate the adequacy of using a variable reduction function to better represent reality.

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“…The studies of Refs. [3,4,6,8,10] also show RMS profiles with well-defined finite slopes at the origin. The study of Ref.…”

Section: Mathematical Modelsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%