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Applied Sciences
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Investigation of Thermal Properties in Soil and Rock
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Investigation of Thermal Properties in Soil and Rock

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Civil Engineering".

Deadline for manuscript submissions: closed (30 April 2023) | Viewed by 5329

Special Issue Editor

Dr. Seok Yoon

E-Mail Website
Guest Editor
Korea Atomic Energy Research Institute, Daejeon, Korea
Interests: ground thermal properties; energy pile; ground coupled heat exchanger; radioactive waste disposal; compacted bentonite

Special Issue Information

Dear Colleagues,

We would like to invite you to contribute a special issue of Applied Science journal that handles investigation of thermal properties in soil and rock. Thermal properties of soil and rock are important issue of increasing interest in different fields of civil engineering, such as geothermal energy, radioactive waste disposal, underground strructure, and tunneling.

For exmaple, ground thermal conductivity and ground thermal diffusivity can affect the whole capacity of ground souce heat pump system in shallow geothermal energy. The thermal conductivity of the compacted benotnite is a key design parameter to evalaute the safty assessment of deep geological repository facilityi to dispose radioactive waste.

The scope of this Special Issue is to gather original fundamental and applied technnolgoy concerning experimental, theoretical, numerical studies related with thermal proerties of soil and rock. Technical appliation in the field and review papers are also welcomed.

Dr. Seok Yoon
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • thermal properties of soil and rock
  • shallow geothermal energy
  • radioactive waste disposal
  • compacted bentonite buffer
  • testing
  • modeling

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Published Papers (2 papers)

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Research

18 pages, 3193 KiB  
Article
Artificial Neural Network-Based Model for Prediction of Frost Heave Behavior of Silty Soil Specimen
by Seok Yoon, Dinh-Viet Le and Gyu-Hyun Go
Appl. Sci. 2021, 11(22), 10834; https://doi.org/10.3390/app112210834 - 16 Nov 2021
Cited by 1 | Viewed by 2174
Abstract
Frost heave action is a major issue in permafrost regions that can give rise to various geotechnical engineering problems. To analyze and predict this phenomenon at a specimen scale, this study conducted a fully coupled thermal-hydro-mechanical analysis and evaluated the frost heave behavior [...] Read more.
Frost heave action is a major issue in permafrost regions that can give rise to various geotechnical engineering problems. To analyze and predict this phenomenon at a specimen scale, this study conducted a fully coupled thermal-hydro-mechanical analysis and evaluated the frost heave behavior of frozen soil considering geotechnical parameters. Furthermore, a parametric study was performed to quantitatively analyze the effects of major geotechnical properties on frost heave behavior. According to the results of the parametric study, the amount of heave tended to decrease as the particle thermal conductivity increased, whereas the frost heave ratio tended to increase as the initial hydraulic conductivity increased. After evaluating the sensitivity of each parameter to frost heave behavior through statistical analyses, an artificial neural network model was developed to practically predict frost heave behavior. According to the verification results of the neural network model, the trained network model demonstrated a reliable accuracy (R2 = 0.893) in predicting frost heave ratio, even when the model used test datasets that were not part of the training datasets. Full article
(This article belongs to the Special Issue Investigation of Thermal Properties in Soil and Rock)
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12 pages, 22933 KiB  
Article
Numerical Study on the Effect of Enhanced Buffer Materials in a High-Level Radioactive Waste Repository
by Min-Jun Kim, Gi-Jun Lee and Seok Yoon
Appl. Sci. 2021, 11(18), 8733; https://doi.org/10.3390/app11188733 - 18 Sep 2021
Cited by 5 | Viewed by 2454
Abstract
In deep geological disposal system designs, it is important to minimize the installation area for cost effectiveness while satisfying the thermal requirements of the systems. An effective method to reduce the installation area for the systems is to employ an enhanced buffer material, [...] Read more.
In deep geological disposal system designs, it is important to minimize the installation area for cost effectiveness while satisfying the thermal requirements of the systems. An effective method to reduce the installation area for the systems is to employ an enhanced buffer material, as this can decrease the spacing between the disposal tunnels and deposition holes. Therefore, this study aims to evaluate the effect of an enhanced buffer material on the thermal behavior of the systems and their spacing. First, the discrete element method (DEM) was adopted to validate the thermal conductivity of the enhanced buffer material used, which was a mixture of bentonite and graphite. Then, a 3D finite element method (FEM) was conducted to analyze the proper disposal tunnel and hole spacing considering three cases with thermal conductivities values of the buffer as 0.8 W/(m K), 1.0 W/(m K), and 1.2 W/(m K). The results showed that the disposal tunnel and hole spacing could be reduced to 30 m and 6 m, respectively, when the temperature of the buffer surface facing the canister was 100 °C with a thermal conductivity value of approximately 1.2 W/(m K) or if more than 3% of graphite is added. Full article
(This article belongs to the Special Issue Investigation of Thermal Properties in Soil and Rock)
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