Effect of a varying moisture diffusivity in the transport of gadolinium in a porous material

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F19%3A00339279" target="_blank" >RIV/68407700:21110/19:00339279 - isvavai.cz</a>

Alternative codes found

RIV/68407700:21340/19:00339279

Result on the web

<a href="http://dx.doi.org/10.1063/1.5120156" target="_blank" >http://dx.doi.org/10.1063/1.5120156</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.5120156" target="_blank" >10.1063/1.5120156</a>

Result language

angličtina

Original language name

Effect of a varying moisture diffusivity in the transport of gadolinium in a porous material

Original language description

Models of salts transport in porous media with constant diffusion parameters are known to usually fail to match experimental data. On the other hand, diffusivities depending on the moisture or salts concentrations can reproduce the data with good accuracy. In this paper we assess the effect of the water content dependence of the moisture diffusivity in the transport of gadolinium in a dry cement based composite investigated by neutron imaging. Such composites are planned to be an essential part of the multi-barrier systems in nuclear waste management, and their use for this purpose requires detailed studies of their transport properties. We interpret experimental data on the gadolinium transport using an advection-diffusion model of Bear and Bachmat in which sorption is described by a linear isotherm. The optimization of model parameters is based on the Levenberg-Marquardt method. We find that the difference between the results for the constant and varying moisture diffusivities is small, both yielding large discrepancies with respect to the data.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Project

<a href="/en/project/GA17-11635S" target="_blank" >GA17-11635S: Cement composite for radionuclide encasement</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Central European Symposium on Thermophysics 2019 (CEST)

ISBN

978-0-7354-1876-9

ISSN

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e-ISSN

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Number of pages

6

Pages from-to

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Publisher name

AIP Conference Proceedings

Place of publication

New York

Event location

Banská Bystrica, Slovakia

Event date

Oct 16, 2019

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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