An experimental and analytical study of the effect of cold compression on the thermophysical properties of a granular medium

Mohamed Filali; Kacim Hadjadj; Lakhdar Hachani; Ahmed Mechraoui; Mohamed El-Amine Slimani; Mounir Sakmeche; Mohamed Filali; Kacim Hadjadj; Lakhdar Hachani; Ahmed Mechraoui; Mohamed El-Amine Slimani; Mounir Sakmeche

doi:10.3934/matersci.2020.1.116

AIMS Materials Science

2020, Volume 7, Issue 1: 116-129. doi: 10.3934/matersci.2020.1.116

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Research article

An experimental and analytical study of the effect of cold compression on the thermophysical properties of a granular medium

1.
National School of Architecture, Rabat, Crd, Morocco
2.
Laboratory of Materials Physics, Amar Telidji University. Laghouat, Algeria
3.
Laboratory of Saharan natural resources, Department of hydrocarbons and renewable energies, Faculty of Science and Technology, Ahmed Draya University. 01000 Adrar, Algeria
4.
Department of Chemical Engineering and CERSIM, University of Laval, Quebec City, Canada
5.
Department of Energetic and Fluid Mechanics, Faculty of Physics, University of Science and Technology Houari Boumediene (USTHB), 16111, Algiers, Algeria

Received: 26 November 2019 Accepted: 10 March 2020 Published: 20 March 2020

Based on the previous literature, very few models have described the thermal behavior of granular media or powders as a function of the mechanical stresses to which they are subjected. In recent years, many researchers have been interested in establishing laws that can express the relationship between the apparent thermal conductivity and the mechanical behavior of granular media. The present paper seeks to present a simple model that describes the variation of the apparent thermal conductivity of a granular medium as a function of the mechanical stress. One of the main objectives of this paper is to produce a tool for calculating the thermal conductivity of heterogeneous media, especially that of granular media. For the resolution of the problem, it was decided to use an experimental method recently developed in the laboratory and which is due to be the basis of our calculations. This method is called the hot rod method. It was initially developed to evaluate the damage to a soil subject to superficial heat shock (fires, burns). The results show that for short times and a distance between two measurement points large enough, the 2D transfer can be reduced to a 1D transfer which for long times is hybridized to a hot wire transfer. The modeling of thermal transfers within the environment makes it possible to know the temperature field of soil under the effect of a thermal accident.

Keywords:

Citation: Mohamed Filali, Kacim Hadjadj, Lakhdar Hachani, Ahmed Mechraoui, Mohamed El-Amine Slimani, Mounir Sakmeche. An experimental and analytical study of the effect of cold compression on the thermophysical properties of a granular medium[J]. AIMS Materials Science, 2020, 7(1): 116-129. doi: 10.3934/matersci.2020.1.116

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Abstract

Environmental degradation and climate change exacerbate the challenges humanity faces. Coping with climate change, controlling environmental pollution and promoting harmonious coexistence between man and nature have become the core issues of sustainable development of the global economy and society. The Sustainable Development Goals and the Paris Agreement on Climate Change indicate a fundamental re-organization of both the financial system and the economy it serves and also imply an intensive study of the current economic and financial development model of every country. Hence, aligning finance with sustainability is subject to much research, experimentation and practice.

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Firstly, green finance research is an important means to promote the sustainable development of society, economy and ecology. Green finance is defined as comprising "all forms of investment or lending that consider environmental effect and enhance environmental sustainability" (Volz et al., 2015: 2). Sustainable investment and lending are significant aspects of green finance, considering sustainable standards, and environmental and climate risks. Besides, to align the financial system and policies with sustainable goals are also crucial for achieving a green transformation. Sustainability is without doubt a very important area of research, evidenced by its unprecedented growth in the last decade. In the field of academic research, sustainability-themed papers are becoming more and more prominent with rising awareness of challenges such as global climate change and resources shortage. With the development of the economy, the financial system and mechanism are continuously adjusted to mobilize and allocate financial resources reasonably and effectively and improve financial efficiency, so as to realize the effective operation and steady development of the economy and finance in the long run. The quantitative research of green finance can greatly promote the sustainable development of domestic and global economy and finance. The UNEP Inquiry (2015) identified five areas of emerging practice in embedding sustainable development into the financial system which are all worth studying in the near future: (ⅰ) enhancing market practice: Disclosure, analysis, risk management; (ⅱ) upgrading governance architectures: Internalizing sustainable development into financial decision-making of financial regulators and central bank; (ⅲ) encouraging cultural transformation: capacity building, behaviour, market structure; (ⅳ) harnessing the public balance sheets: Fiscal incentives, public financial institutions and central banks; (ⅴ) directing finance through policy: Requirements and prohibitions, enhanced liability.

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