Determination of Thermal Regime in Sandy Soils: Mathematical Framework ATHERES

Mondal, Somenath; Sharma, Vikas; Singh, Devendrá; Baghini, Maryam Shojaei

doi:10.1061/(asce)gm.1943-5622.0000918

Cited by 6 publications

(6 citation statements)

References 65 publications

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“…Further, from Table 1, it can be observed that the k of the MSW varies between 0.01 and 1.50 W/(m K) (Bonany et al, 2013;Hanson et al, 2008;Yeşiller et al, 2015;Manjunatha et al, 2020;Nocko et al, 2021), which is, in general, higher than that of dry inorganic soils (k=0.27-0.38 W/m K) (Mondal et al, 2016(Mondal et al, , 2017. Such a higher value can be due to the higher moisture content and electrical conductivity of the leachate (Grellier et al, 2006), which is proportional to k (Schwarz and Bertermann, 2020).…”

Section: Thermal Properties Of Msw: Guiding Factor Of Landfill Firesmentioning

confidence: 92%

Occurrence and ecotoxicological effects of fires at municipal solid waste landfills

Mohammad

Paleologos

Ogrodnik

et al. 2024

Environmental Geotechnics

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Surface and sub-surface fire in municipal solid waste landfills (including dumpsites) is a complex and intricate phenomenon, whose frequency is expected to increase due to climate change. Partial or incomplete combustion of landfill waste at low temperatures during fires leads to generation of toxic compounds, including hydrocarbons, particulate matter and hazardous gases, which contaminate the surrounding geoenvironment and ultimately pose severe health hazards to living entities. Under these circumstances, it is the need of the hour to understand the (i) occurrence mechanisms of landfill fires, (ii) waste properties and operational conditions that may favour landfill fires and (iii) strengths and limitations of the available detection techniques in order to provide recommendations to detect such incidences at an early stage and plan emergency measures. Hence, the present review article critically assimilates the literature on landfill fires and discusses the (a) conditions under which the initiation and sustenance of landfill fires take place, (b) ecotoxicological (geoenvironmental) hazards of landfill fires, both in short- and long-term and (c) detection techniques for an early warning system. Finally, a discussion on the coupled multi-physics interactions undergoing in the waste matrix during landfill fires is presented in this manuscript, which is crucial to mastering this subject.

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Section: Thermal Properties Of Msw: Guiding Factor Of Landfill Firesmentioning

confidence: 92%

Occurrence and ecotoxicological effects of fires at municipal solid waste landfills

Mohammad

Paleologos

Ogrodnik

et al. 2024

Environmental Geotechnics

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“…A temperature of 60 ⁰ C was applied at the top surface of this column, as depicted in Fig1a. Furthermore, as depicted in Fig1b, the flux sensors, and thermocouples were embedded at 5 cm and 9 cm depths, respectively, in the sample (Mondal et al 2017). The heat gun was kept at a height of 400mm which ensured uniform heat application at the top surface of the column.…”

Section: Statement Of the Problemmentioning

confidence: 99%

“…Some of the broadly used approaches are Finite Element Method (FEM) ( Timlin et al 2002;Han and Huang 2002;Bittelli et al 2008,), Finite Volume Method (LeVeque 2002), Finite Difference Method (FDM) (Sharratt et al 1992;Han and Huang 2002;Wu and Sun 2004;Wang et al 2011), Force Restore Method (FRM) ( Liebethal and Foken 2007;Gao et al 2008). Moreover, different analytical methods like Harmonic Method, Laplace Transform Method, and Fourier Transform Method, have been considered by several researchers (Heusinkveld et al 2004;Gao et al 2007;Evett et al 2012;Wang et al 2012) to solve HTE in order to predict the thermal regime in soil mass (Mondal et al 2017). Nonetheless, the major hindrance of some of the abovementioned methods is that they involve complicated mathematics which is not convenient to the practising engineers.…”

Section: Introductionmentioning

confidence: 99%

A finite difference model for undefined end boundary to analyse the heat transfer in dry sands

Mondal

Singh

Tang³

et al. 2020

International Journal of Geotechnical Engineering

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Accurate prediction of thermal regime (i.e., the variation of soil temperature, θ, and heat flux,  ) to investigate the migration of thermal energy in soil mass, poses challenge to the geoenvironmental engineers while dealing with various thermo-active structures. In this context, several numerical approaches have been attempted to solve the heat transfer equation (HTE) for conduction to predict the thermal regime. However, most of them need accurate boundary condition defined and involve complicated numerical approach which is inconvenient for the practising engineers. Hence, an attempt has been made in the present study to develop a simplified, but numerically efficient, approach based on the finite difference method (FDM) to analyse one dimensional heat transfer in dry sands when the end boundary is not defined. Furthermore, a time dependent initial boundary condition has been applied to this model to simulate similar experimental condition and results have been compared vis-à-vis those obtained from the experiment and COMSOL Multiphysics ® to validate the proposed approach.

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“…This calls for extensive studies to establish the mechanism of heat migration in geomaterials, by measuring their thermal response, i.e., thermal regime, particularly, under variable temperature conditions. One of the ways to achieve this would be to quantify 'the zone of influence of the heat source,' by measuring the thermal flux, /, and temperature, h, over prolonged durations in the spatial domain [110,111,113]. This could be done quite efficiently with the help of flux sensors and MEMS-based temperature sensors [203], of extremely high precision.…”

Section: Monitoring and Simulation Of Heat Migrationmentioning

confidence: 99%

“…Also, a unified mathematical framework, ATHERES, has also been developed to estimate thermal regime in the dry soil mass. The proposed approach couples Taylor's series into the governing differential equation of one-dimensional heat conduction [113].…”

Section: Monitoring and Simulation Of Heat Migrationmentioning

confidence: 99%

Novel Techniques to Simulate and Monitor Contaminant–Geomaterial Interactions

Singh

2019

Indian Geotech J

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Generation of huge amount of the toxic and hazardous wastes coming out of various industrial and domestic activities is becoming a major threat to the society. In the long run, mainly because of nonscientific storage, disposal and closure, and due to the presence of undesirable concentration(s) of chemicals and radionuclides, elevated temperatures and microbial activity, these wastes (read contaminants) interact with geomaterials, viz., soils, rock mass, groundwater. This interaction, termed as contaminant-geomaterial interaction, depending upon the severity of the contaminant(s) and interaction time, might alter overall characteristics of the geomaterials. Unfortunately, conventional laboratory and field instrumentation techniques are not well equipped to capture such interaction(s) and the mechanisms that prevail in the geomaterials. Hence, to achieve these objectives, evolving adequate and workable strategies, and modalities, that are nondestructive, noninvasive and economical is desirable. In this context, author's association with several industries resulted in development of innovative, cost-effective, yet efficient techniques that facilitate laboratory and/or in situ simulation and monitoring of such interaction(s). Details of these techniques, the philosophy behind their creation and the way they can be employed for safeguarding geoenvironment, from deterioration, are presented and discussed in this paper. Also, a brief discussion on some of the real-life situations where such techniques can be applied easily, by suitably modifying them, is presented for the benefit of the aspiring researchers and professionals.

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Determination of Thermal Regime in Sandy Soils: Mathematical Framework ATHERES

Cited by 6 publications

References 65 publications

Occurrence and ecotoxicological effects of fires at municipal solid waste landfills

Occurrence and ecotoxicological effects of fires at municipal solid waste landfills

A finite difference model for undefined end boundary to analyse the heat transfer in dry sands

Novel Techniques to Simulate and Monitor Contaminant–Geomaterial Interactions

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