Determining pore size distribution in rocks using shear-thinning fluids: Utilisation of the method in geomorphology

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F24%3A10486953" target="_blank" >RIV/00216208:11310/24:10486953 - isvavai.cz</a>

Result on the web

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=RB7yl03VCV" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=RB7yl03VCV</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/esp.5987" target="_blank" >10.1002/esp.5987</a>

Result language

angličtina

Original language name

Determining pore size distribution in rocks using shear-thinning fluids: Utilisation of the method in geomorphology

Original language description

The pore space characteristics of geological materials are closely related to their mechanical, transport and hydraulic properties. In geomorphology, pore size distribution (PSD) is an important characteristic in rock weathering, evaporation and other studies. In an effort to find novel methods to determine the PSD, perhaps to bypass the disadvantages of the current techniques, there has been a growing interest in the use of non-Newtonian fluids. In this contribution, we are particularly interested in the method recently introduced by Abou Najm and Atallah (the ANA method), which exploits the way in which the flow of different shear-thinning fluids distributes differently in the pore space to compute the functional PSD estimation. We performed a set of saturated flow experiments with aqueous xanthan gum solutions of different concentrations, using as simple as possible laboratory settings, and we implemented a modified version of the previously introduced numerical model to obtain the PSDs of four sandstone and one tuff samples. The results are compared with conventional mercury intrusion porosimetry, showing a good agreement regarding the dominant pore size and a notable similarity in the distributions. Several limitations were identified as well, such as the lack of information on relatively small pores (&lt;5-10 μm for the samples studied) and the potential issues in obtaining a more detailed distribution. We conclude that the ANA method is promising for geomorphological evaporation and rock durability studies, particularly for coarser materials such as sandstone, but it also encounters challenges for certain applications, especially for fine-grained rocks. It must be acknowledged that the ANA method has been tested on a limited range of materials and further investigation is required to fully explore its capabilities and limitations.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10505 - Geology

Project

<a href="/en/project/GA21-27291S" target="_blank" >GA21-27291S: Non-Newtonian fluid mechanics in porous media: characterization of the hydraulic and transport properties in relation to the pore size distribution.</a><br>

Continuities

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

Publication year

2024

Confidentiality

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

Name of the periodical

Earth Surface Processes and Landforms

ISSN

0197-9337

e-ISSN

1096-9837

Volume of the periodical

49

Issue of the periodical within the volume

14

Country of publishing house

GB - UNITED KINGDOM

Number of pages

13

Pages from-to

4650-4662

UT code for WoS article

001313288900001

EID of the result in the Scopus database

2-s2.0-85204143201