Contribution of thermal radiation in measurements of thermal conductivity of sandstone

Zarichnyak, Yu. P.; Ramazanova, A. E.; Emirov, S. N.

doi:10.1134/s1063783413120330

Cited by 24 publications

(8 citation statements)

References 6 publications

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“…Of equal importance is the differential thermal emission between the background matrix and buried building stone. As shown above, materials such as sandstone have a high thermal conductivity, various forms of rock having typical values of 1.2 -5.9 Wm −1 K −1 [45][46][47] whereas unconsolidated soils (characteristic of plough soil or roughly cultivated land) have a range of 0.15 -3.5 Wm −1 K −1 at normal ground-level atmospheric temperature (20 ± 20 • C) [48,49], but more typically in the 1.5 -2.0 Wm −1 K −1 range with a root-mean square error (RMSE) of~0.2 Wm −1 K −1 [50][51][52]. Thus a thermal emission difference in a buried sandstone wall, sufficiently shallow to be heated by solar radiation, might be expected to be in the order of 0.75 Wm −1 K −1 , which is easily detectable from an aerial thermal survey, though related effects of soil compaction and voids have also been shown to yield good differentiation [53].…”

Section: Aerial Photography In Archaeologymentioning

confidence: 94%

Mapping Heterogeneous Buried Archaeological Features Using Multisensor Data from Unmanned Aerial Vehicles

Brooke

Clutterbuck

2019

Remote Sensing

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There is a long history of the use of aerial imagery for archaeological research, but the application of multisensor image data has only recently been facilitated by the development of unmanned aerial vehicles (UAVs). Two archaeological sites in the East Midlands U.K. that differ in age and topography were selected for survey using multisensor imaging from a fixed-wing UAV. The aim of this study was to determine optimum methodology for the use of UAVs in examining archaeological sites that have no obvious surface features and examine issues of ground control target design, thermal effects, image processing and advanced filtration. The information derived from the range of sensors used in this study enabled interpretation of buried archaeology at both sites. For any archaeological survey using UAVs, the acquisition of visible colour (RGB), multispectral, and thermal imagery as a minimum are advised, as no single technique is sufficient to attempt to reveal the maximum amount of potential information.

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Section: Aerial Photography In Archaeologymentioning

confidence: 94%

Mapping Heterogeneous Buried Archaeological Features Using Multisensor Data from Unmanned Aerial Vehicles

Brooke

Clutterbuck

2019

Remote Sensing

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“…9) other than the lattice thermal conductivity and in some cases the thermal conductivity varies with temperature and pressure (Somerton, 1992;Zarichnyak et al, 2013;Verma et al, 2016). The thermal conductivity of sandstone is determined not only by their mineral composition but also by their grain and pore fabrics: porosity, dispersion, roundness and grain sorting, type of cementing material, and type of fluid filling in the pores.…”

Section: Discussionmentioning

confidence: 99%

“…As illustrated in Figure 6, the increases of the thermal conductivity of samples saturated with oil and those saturated with water are about 5-7 % and 11-15 %, respectively. The increase of thermal conductivity with the increase of pressure substantially depends on the thermal conductivity of the fluid filled in the pores (Zarichnyak et al, 2013).…”

Section: Influence Of Pressure On Thermal Conductivitymentioning

confidence: 99%

“…Clauser and Huenges (1995) reported the relationship between thermal conductivity and the type of mineralogical composition. The mechanisms of thermal conductivity in rocks are so complex that it is difficult and sometimes impossible to theoretically and correctly predict the thermal conductivity of porous materials, even under many simplifications and assumptions (Zarichnyak et al, 2013). Rocks are composed of…”

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Analyses of the factors influencing sandstone thermal conductivity

Sun¹

2017

Acta Geodynamica Et Geomaterialia

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Thermal conductivity is a thermodynamic parameter playing an important role in the heat transfer process in geothermic and numerous engineering fields. In order to analyze the factors influencing the thermal conductivity of sandstone, the data of thermal conductivity obtained from the literatures in China and abroad were summarized. The influences of porosity, moisture and fluidic content, pressure and temperature on the thermal conductivity were analyzed and discussed. The survey results show that the thermal conductivity of sandstones mainly depends on its mineralogical composition, microstructure, porosity, saturation, pressure and temperature. It increases with the degree of fluid saturation and pressure, while decreases with the increase of porosity and temperature. The result of analysis shows that when the degree of saturation is higher than 15 %, the thermal conductivity curve is a linear function of the degree of saturation. ARTICLE INFO

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“…Permeability is an important physical parameter in the geological sciences and geotechnical engineering and has been investigated with regard to, coal gasification (Hetherington and Thambimuthu, 2003), disposal of high-level radioactive wastes (Takeda et al, 2009), underground oil and gas reservoirs (Shahverdi and Sohrabi, 2017), shale oil production (Egboga et al, 2016), extraction of geothermal energy (Somerton and Boozer, 1960;Zarichyak et al, 2013), protection of stone cultural relics (Hajpál, 2002;Hajpál and Török, 2004), underground oil or gasification (Wu et al, 2003;Kök, 2009;Zhao et al, 2009;Ranjith et al, 2012;), deep petroleum boring (Gao, 2005;Dutton et al, 2012), coal pyrolysis (Zhao et al, 2009;Liang et al, 2005), water inrushes in underground projects (Ding et al, 2016) and extraction of geothermal energy (Yang et al, 2017). In these experiments, the rock is always affected by certain temperatures and confining pressures.…”

Section: Introductionmentioning

confidence: 99%

Temperature and pressure effect on permeability of Chinese sandstone: A review.

Ge¹

2018

Acta Geodynamica Et Geomaterialia

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Permeability plays an important role in the field of geotechnical engineering. Under high temperature and high pressure condition, the physical-chemical and structure properties (such as decomposition, oxidation, dehydration, evaporation, phase transition etc.) of rock have obviously changing, which are significant affected the rock permeability. In order to analyze the influence of temperature and confining pressure on the permeability of rock (sandstones, siltstones and conglomerates) data for permeability was obtained from the literature. The results indicate that temperature and confining pressure have great influence on the permeability of rock, especially for sandstone. There is a threshold temperature and when the heating temperature is lower than the threshold temperature, the permeability of sandstone gradually increases with an increase in temperature. When the heating temperature is higher than 300 ºC (especially 400 ºC), the permeability rapidly increases. The permeability of sandstone decreases gradually with the confining pressure increases. This study of the relationship between rock permeability and temperature and confining pressure lays a foundation for investigations of multidisciplinary issues regarding high temperatures and high pressures and it can be used for the study of petroleum storage and safe nuclear waste disposal.

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Contribution of thermal radiation in measurements of thermal conductivity of sandstone

Cited by 24 publications

References 6 publications

Mapping Heterogeneous Buried Archaeological Features Using Multisensor Data from Unmanned Aerial Vehicles

Mapping Heterogeneous Buried Archaeological Features Using Multisensor Data from Unmanned Aerial Vehicles

Analyses of the factors influencing sandstone thermal conductivity

Temperature and pressure effect on permeability of Chinese sandstone: A review.

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