Neutron Radiography Studies of Water Self-Diffusion in Porous Medium

• Authors: J. Milczarek , I. Fijał-Kirejczyk , M. Chojnowski , J. Żołądek
• Languages of publication: EN

Abstracts

EN

The results of neutron radiography studies on macroscopic self-diffusion of water confined within rigid porous material reveal the substantial reduction in diffusion constant in comparison to the diffusion in large volume. The studies performed in the 30-50°C temperature range on fired clay brick of 30% porosity show decrease in diffusion constant to approximately 17% of its value for free space and the Archie exponent is 1.4. The Arrhenius law was confirmed and the activation energy was found of the same value as in the water bulk.

Keywords

EN

66.10.cg; 66.30.jj; 47.56.+r; 81.70.-q

Discipline

• 47.56.+r: Flows through porous media
• 66.10.cg: Mass diffusion, including self-diffusion, mutual diffusion, tracer diffusion, etc.
• 66.30.jj: Diffusion of water
• 81.70.-q: Methods of materials testing and analysis(see also 82.80.-d Chemical analysis and related physical methods of analysis)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2008
• Volume: 113
• Issue: 4
• Pages: 1237-1244

Dates

published

2008-04

received

2007-06-03

Contributors

author

J. Milczarek

• Institute of Atomic Energy, Świerk, 05-400 Otwock, Poland

author

I. Fijał-Kirejczyk

• Institute of Atomic Energy, Świerk, 05-400 Otwock, Poland

author

M. Chojnowski

• Institute of Atomic Energy, Świerk, 05-400 Otwock, Poland

author

J. Żołądek

• Institute of Atomic Energy, Świerk, 05-400 Otwock, Poland

References

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Identifiers

DOI

10.12693/APhysPolA.113.1237