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Diffusion coefficient

Determination of the diffusion coefficient of oxygen for a cover system including a pulp and paper by-product

Determination of the diffusion coefficient of oxygen for a cover system including a pulp and paper by-product

... In this paper, the authors describe the details of a laboratory procedure developed to obtain the diffusion coefficient of oxygen through compacted deinking residues and eventually quantify oxy- gen fluxes. ...

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Carburization of austenitic and ferritic steels in carbon-saturated sodium: preliminary results on the diffusion coefficient of carbon at 873 K

Carburization of austenitic and ferritic steels in carbon-saturated sodium: preliminary results on the diffusion coefficient of carbon at 873 K

... Steel: Diffusion Coefficient of Carbon and Kinetics of Carburization In this part, the procedural steps used to determine the diffusion coefficient of carbon and the kinetics of carburization ...

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Inference for epidemic data using diffusion processes with small diffusion coefficient

Inference for epidemic data using diffusion processes with small diffusion coefficient

... context, diffusion processes provide a good approximation of epidemic dynamics and, due to their analytical power, allow shedding new light on inference problems of epidemic ...bidimensional diffusion with ...

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Particle in box: A cell for in-situ measurements of porosity and effective diffusion coefficient during thermophysical transformations

Particle in box: A cell for in-situ measurements of porosity and effective diffusion coefficient during thermophysical transformations

... - verification of the porosity distribution homogeneity at different positions inside the spherical sample (See Table 1). The porosity can be determined from an interpretation of the elution curve after the gas ...

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Scaling limits of a tagged particle in the exclusion process with variable diffusion coefficient

Scaling limits of a tagged particle in the exclusion process with variable diffusion coefficient

... are related to scaling limits for the current through the h−1, 0i bond in a zero-range dynamics. We call this relation the coupling method. The main problem is that the associated zero-range dynamics in the case of ...

9

Effective oxygen diffusion coefficient of till and green liquor dregs (GLD) mixes used in sealing layer in mine waste covers

Effective oxygen diffusion coefficient of till and green liquor dregs (GLD) mixes used in sealing layer in mine waste covers

... Référence: Citation : Virolainen, A., Maurice, C. & Pabst, T. (2020). Effective oxygen diffusion coefficient of till and green liquor dregs (GLD) mixes used in sealing layer in mine waste covers. Water, ...

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Analytical and numerical study of the apparent diffusion coefficient in diffusion MRI at long diffusion times and low b-values

Analytical and numerical study of the apparent diffusion coefficient in diffusion MRI at long diffusion times and low b-values

... Abstract Diffusion magnetic resonance imaging provides a measure of the average distance travelled by water molecules in a medium and can give useful information on cellular structure and structural change when ...

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Measurement of the Diffusion Coefficient of Miscible Fluids using both Interferometry and Wiener's Method

Measurement of the Diffusion Coefficient of Miscible Fluids using both Interferometry and Wiener's Method

... average diffusion coefficient was obtained by analysis of the measured concentration gradient profile, assuming that the diffusion process is one-dimensional and is characterized by a constant value ...

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Correlation for the effective gas diffusion coefficient in carbon paper diffusion media

Correlation for the effective gas diffusion coefficient in carbon paper diffusion media

... and diffusion direction were provided in ...for diffusion in sand with various packing and showed very good agreement with experimental ...effective diffusion coefficient in the GDL of PEM ...

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An efficient discretisation scheme for one dimensional SDEs with a diffusion coefficient function of the form |x|^a, a in [1/2,1)

An efficient discretisation scheme for one dimensional SDEs with a diffusion coefficient function of the form |x|^a, a in [1/2,1)

... Rapport de recherche no 5396 – version 2 † — version initiale D´ ecembre 2004 — version r´ evis´ ee Juillet 2007 44 pages Abstract: In this paper, we study the rate of convergence of a symmetrized version of the ...

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Effect of uniaxial compressive loading on gas permeability and chloride diffusion coefficient of concrete and their relationship

Effect of uniaxial compressive loading on gas permeability and chloride diffusion coefficient of concrete and their relationship

... la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d’enseignement et de recherche français ou étrangers, des laboratoires publics ou ...

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Carburization of austenitic and ferritic steels in carbon-saturated sodium: preliminary results on the diffusion coefficient of carbon at 873 K

Carburization of austenitic and ferritic steels in carbon-saturated sodium: preliminary results on the diffusion coefficient of carbon at 873 K

... Brigitte Duprey 1 • Didier Hamon 2 • Michel Tabarant 3 • Daniel Monceau 4 Abstract Three commercial steels were exposed to carbon-saturated sodium at 873 K for durations up to 5000 h. Analyses by optical microscopy, ...

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The Output Least Squares Identifiability of the Diffusion Coefficient from an $H1-Observation in a 2-D Elliptic Equation

The Output Least Squares Identifiability of the Diffusion Coefficient from an $H1-Observation in a 2-D Elliptic Equation

... Unit´e de recherche INRIA Lorraine, Technopˆole de Nancy-Brabois, Campus scientifique, ` NANCY 615 rue du Jardin Botanique, BP 101, 54600 VILLERS LES Unit´e de recherche INRIA Rennes, Ir[r] ...

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Electrochemical determination of ferrocene diffusion coefficient in liquid media under high CO2 pressure:
Application to DMF–CO2 mixtures

Electrochemical determination of ferrocene diffusion coefficient in liquid media under high CO2 pressure: Application to DMF–CO2 mixtures

... Cyclic voltammetry was used in order to obtain values of diffusion coefficient of ferrocene, which were determined by using the Randles–Sevcik relation.. This method proved to be convenient[r] ...

8

A new spectroscopic method for measuring ferric diffusion coefficient in gelatin-based dosimeter gels

A new spectroscopic method for measuring ferric diffusion coefficient in gelatin-based dosimeter gels

... the diffusion coeffi- cient have been introduced in the evaluation of the ...the diffusion coefficient obtained with the absorption spectroscopy method by only ...

17

Generalized method for determining fluoroacidity by electrochemical diffusion coefficient measurement (application to HfF4)

Generalized method for determining fluoroacidity by electrochemical diffusion coefficient measurement (application to HfF4)

... In this study, the difference was found to be 18 & 2 mV, corresponding to a value of 3.8 & 0.3 exchanged electrons. The linear relationship between Hf(IV) reduction peak current density at -1.43 V vs. Pt and the ...

7

Generalized method for determining fluoroacidity by electrochemical diffusion coefficient measurement (application to HfF4)

Generalized method for determining fluoroacidity by electrochemical diffusion coefficient measurement (application to HfF4)

... the diffusion coefficient of a species in various molten media [5] ...the diffusion coefficients and the discrimination was complicated by a lack of ...

6

Caractérisation physicochimique par électrophorèse capillaire de nanoparticules magnétiques, anioniques et cationiques : distribution de taille, densité de charge et coefficient de diffusion collectif

Caractérisation physicochimique par électrophorèse capillaire de nanoparticules magnétiques, anioniques et cationiques : distribution de taille, densité de charge et coefficient de diffusion collectif

... 1. Introduction Superparamagnetic iron oxide nanoparticles (NPs) with appropriate surface chemistry are widely used for numerous applications such as MRI contrast enhancement [1], tissue engineering [2], immunoassay ...

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Coefficient determination via asymptotic spreading speeds

Coefficient determination via asymptotic spreading speeds

... In the case of bounded domains, several kinds of observations can be used for the determination of a coefficient. Many results are based on a method involving Carleman inequalities, which has been introduced in ...

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Coefficient de fond des jaugeages par exploration du champ des vitesses

Coefficient de fond des jaugeages par exploration du champ des vitesses

... Il est important de noter que v f est la vitesse moyenne sur toute la zone de fond (comprise entre le fond et la mesure de vitesse la plus basse). Elle est distincte de la vitesse locale au fond, v f , qui est ...

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