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Journal articles on the topic 'Body heat conductivity'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

dos Santos Horbach, Cristina, Elizaldo Domingues dos Santos, Liércio André Isoldi, and Luiz Alberto Oliveira Rocha. "Constructal Design of Y-Shaped Conductive Pathways for Cooling a Heat-Generating Body." Defect and Diffusion Forum 348 (January 2014): 245–60. http://dx.doi.org/10.4028/www.scientific.net/ddf.348.245.

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This paper applies constructal design to obtain numerically the configuration that facilitates the access of the heat that flows through Y-shaped pathways of a high-conductivity material embedded within a square-shaped heat-generating medium of low-conductivity to cooling this finite-size volume. The objective is to minimize the maximal excess of temperature of the whole system, i.e., the hot spots, independent of where they are located. The total volume and the volume of the material of high thermal conductivity are fixed. Results show that there is no universal optimal geometry for the Y-sha

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Ibraimov, A. I., and S. K. Tabaldiev. "Condensed Chromatin, Cell Thermoregulation and Human Body Heat Conductivity." Journal of Human Ecology 21, no. 1 (2007): 1–22. http://dx.doi.org/10.1080/09709274.2007.11905944.

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3

Zui, Vladimir I., and Lukman Akinyemi. "Summary of heat flow studies in Nigeria." Journal of the Belarusian State University. Geography and Geology, no. 2 (November 29, 2019): 121–32. http://dx.doi.org/10.33581/2521-6740-2019-2-121-132.

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A traditional approach for heat flow determination requires two parameters. They are a geothermal gradient and heat conductivity of rocks comprising the considered depth interval. The geothermal gradient is determined from a thermogram recorded in a wellbore and the heat conductivity is obtained from the laboratory measurements of selected rock samp les. There are some variations of this approach to both get the gradient and heat conductivity values. However, there are many areas without boreholes to register their thermograms, or at least to have several temperature readings at intermediate p

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Sun, Jian, and Wei Qiang Liu. "Effect of Heat Leading of Windward Leading Edge Using Heat Pipe with Porous." Advanced Materials Research 217-218 (March 2011): 674–79. http://dx.doi.org/10.4028/www.scientific.net/amr.217-218.674.

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By the uses of finite element method and finite volume method, we calculated the solid domain and fluid domain of windward leading edge which is flying under one condition. And the paper proved that heat pipes which covered on the leading edge have effect on thermal protection. The maximum temperature of the head decreased 12.2%. And the minimum temperature of after-body increased 8.85%. Achieving the transfer of heat from head to after-body, the front head of the thermal load was weakened and the ability of leading edge thermal protection was strengthen. The effect of the thickness of heat pi

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Ibraimov, Abyt. "The Role of Human Skin Color and Body Heat Conductivity in Adaptation to Hot and Cold Climates." Biomedical Research and Clinical Reviews 7, no. 2 (2022): 01–05. http://dx.doi.org/10.31579/2692-9406/123.

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As is known Homo s. sapiens is the only living creature that has managed to inhabit the whole of the Earth, while remaining a single tropical biological species. The case is really unique considering that all this happened in an unprecedentedly short (by evolutionary scale) period of time, if the beginning of this process is considered to be its exit outside of East Africa about 30 000 - 50 000 years ago. However, science does not know everything about how all this happened to a species that itself emerged relatively recently (130 000 - 200 000 year ago) and nevertheless managed to do what oth

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Yan, Jun-Bo, and Song Gao. "Experimental study on heat transfer enhancement of heat storage material for energy pile." Thermal Science 27, no. 1 Part B (2023): 591–97. http://dx.doi.org/10.2298/tsci2301591y.

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As a kind of clean and renewable energy, shallow geothermal energy has the characteristics of wide distribution and huge reserves. The use of pile foundation heat exchange for building heating is a new technology to realize the effective utilization of geothermal energy. Improving the mechanical properties of the pile body material and improving the heat exchange efficiency of the pile foundation concrete will effectively promote the application of concrete in building structures. In this paper, the effect of steel fiber content on the thermal conductivity and mechanical strength of concrete i

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7

Cui, Peng, Fu Mei Wang, and Zhi Yong Liang. "Improved Computation Formula of Thermal Conductivity of Fibrous Porous Materials." Advanced Materials Research 152-153 (October 2010): 605–12. http://dx.doi.org/10.4028/www.scientific.net/amr.152-153.605.

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For the complexity of convective term, the interior heat transfer is important for the engineering testing of heat conduction of fibrous porous materials. In this paper the heat transfer through the body of fibrous porous materials was simulated with finite volume method. By the simulation, it is found that the total heat flux through the body of fibrous porous materials is a linear function of the thermal conductivity when it is measured by the guarded plate, and some constants in the linear function are related with the thickness and permeability coefficient of the sample. The simulated data

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8

Krajewski, Witold K. "Heat Balance of the Model Ingot Head." Materials Science Forum 649 (May 2010): 533–38. http://dx.doi.org/10.4028/www.scientific.net/msf.649.533.

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The paper brings data about heat balance of the killed steel ingot head. The balance is obtained on basis of the temperature measurement in the system: ingot body - ingot head - ingot mould - insulating sleeves – radiation shield - ambient. The measurements were performed using model sys-tem (1:5) of the 20000 kg flat ingot. The balance shows that about 86% of the heat issued during solidification of the ingot head is transferred to the ingot mould through the insulating sleeves. In order to decrease this heat, insulating sleeves of low thermal conductivity are required, which should allow red

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9

Jin, Hong Wen, and Qing Shen Fang. "A Study on the Calculation Model of Rock Soil Thermal Conductivity in the Design of the Ground Source Heat Pump System." Advanced Materials Research 889-890 (February 2014): 1347–52. http://dx.doi.org/10.4028/www.scientific.net/amr.889-890.1347.

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The rock soil thermal conductivity is the most important design parameter for the ground source heat pump system. Based on the equation applied for the heat transfer between the geothermal heat exchanger and its surrounding rock soil, a quasi-three dimensional heat conduction model showing the heat transfer inside the borehole of the U-tube was established to determine the thermal conductivity of the deep-layer rock soil. The results obtained show that the average thermal conductivity got through calculation and actual determination in a tube-embedding region of the ground source heat pump eng

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10

Moitsheki, Raseelo Joel, and Oluwole Daniel Makinde. "Analysis of Nonlinear Heat Transfer in Solids of Various Geometries with Variable Thermal Conductivity and Heat Source." Defect and Diffusion Forum 377 (September 2017): 1–16. http://dx.doi.org/10.4028/www.scientific.net/ddf.377.1.

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In this paper we consider heat transfer in a hot body with different geometries. Here, the thermal conductivity and internal heat generation are both temperature-dependent. This assumption rendered the model considered to be nonlinear. We assume that thermal conductivity is given by a power law function. We employ the preliminary group classification to determine the cases of internal heat generation for which the principal Lie algebra extends by one. Exact solutions are constructed for the case when thermal conductivity is a differential consequence of internal heat generation term. We derive

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11

Onyshkevych, V. M., and G. M. Barabash. "Modelling of contact interaction by “third body” in tribological problems." Bulletin of Taras Shevchenko National University of Kyiv. Series: Physics and Mathematics, no. 3 (2021): 85–88. http://dx.doi.org/10.17721/1812-5409.2021/3.15.

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The variety of factors affecting the thermal conditions of a frictional couple results in complexity of the simulation of this problem. Among these factors, thermophysical (thermal conductivity, specific heat, coefficient of linear expansion of bodies, etc.) and also mechanical ones (elasticity, hardness of contacting bodies, etc.) play an important role. The conditions of friction, wear and heat generation are also determined by the characteristics of the so-called “third body”, i.e., thin near-surface and intermediate layers, the physical and mechanical properties of which differ from those

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12

Formalev, V. F., S. A. Kolesnik, and B. A. Garibyan. "Analytical Solution of the Problem of Conjugate Heat Transfer between a Gasdynamic Boundary Layer and Anisotropic Strip." Herald of the Bauman Moscow State Technical University. Series Natural Sciences, no. 5 (92) (October 2020): 44–59. http://dx.doi.org/10.18698/1812-3368-2020-5-44-59.

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The paper focuses on the problem of conjugate heat transfer between the thermal-gas-dynamic boundary layer and the anisotropic strip in conditions of aerodynamic heating of aircraft. Under the assumption of an incompressible flow which takes place in the shock layer behind the direct part of the shock wave, we found a new analytical solution for the components of the velocity vector, temperature distribution, and heat fluxes in the boundary layer. The obtained heat fluxes at the interface between the gas and the body are included as boundary conditions in the problem of anisotropic heat conduc

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13

Berdnyk, Mykhailo. "MATHEMATIC MODEL OF AND METHOD FOR SOLVING THE DIRICHLET HEAT-EXCHANGE PROBLEM FOR ONE-SHEET ROTARY HYPERBOLOID." System technologies 1, no. 126 (2020): 23–36. http://dx.doi.org/10.34185/1562-9945-1-126-2020-03.

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It is the first generalized 3D mathematical model developed for calculating temperature fields in the thin-wall one-sheet rotary hyperboloid, which rotates with constant angular velocity around the axis OZ, ; the model was created with the help of known equations of generating lines in cylindrical coordinate system with taking into account finite velocity of heat conductivity and in the form of the Dirichlet boundary problem for the hyperbolic equation of heat conduction under condition that heat-conduction properties of the body were constant, and no internal sources of the heat were availabl

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14

McCafferty, D. J., C. Gilbert, A. M. Thierry, J. Currie, Y. Le Maho, and A. Ancel. "Emperor penguin body surfaces cool below air temperature." Biology Letters 9, no. 3 (2013): 20121192. http://dx.doi.org/10.1098/rsbl.2012.1192.

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Emperor penguins Aptenodytes forsteri are able to survive the harsh Antarctic climate because of specialized anatomical, physiological and behavioural adaptations for minimizing heat loss. Heat transfer theory predicts that metabolic heat loss in this species will mostly depend on radiative and convective cooling. To examine this, thermal imaging of emperor penguins was undertaken at the breeding colony of Pointe Géologie in Terre Adélie (66°40′ S 140° 01′ E), Antarctica in June 2008. During clear sky conditions, most outer surfaces of the body were colder than surrounding sub-zero air owing t

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15

Zhang, Xiaoyan, Ziyi Han, Lang Liu, et al. "Experimental Study on Mechanical and Thermal Properties of Backfill Body with Paraffin Added." Energies 17, no. 1 (2023): 217. http://dx.doi.org/10.3390/en17010217.

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Based on phase-change heat storage backfill, paraffin microcapsules were selected as the phase change material and were directly mixed with backfill materials for preparing backfill specimens. The mechanical and thermal properties of specimens with different paraffin percentages and slurry concentrations were tested and analyzed. The results show that compressive strength gradually decreases with an increasing paraffin percentage while it significantly increases with increasing slurry concentration, thermal conductivity decreases with increasing paraffin percentage and specific heat capacity i

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16

Farhan, Farhan, and Muhammad Amir Hamza. "Use of Modified Organic and Inorganic Phase Change Materials for the Development of Personal Cooling Device." Materials Science Forum 1129 (October 30, 2024): 29–36. http://dx.doi.org/10.4028/p-v06hrd.

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The human body needs comfort in every condition. Human health is significantly impacted by heat. The ambient air temperature rises in hot weather, which causes the human body to become fatigued and exhausted. Phase Change Materials (PCM) can solve this problem with high latent heat absorption values and a wide range of phase change temperatures. The objective is to develop a PCM-based cooling device that is safe, readily available, and easy to use in normal routine life. A personal cooling system, such as a cooling vest using PCM, can assist in preventing heat-related issues. In this study, Po

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17

Zhu, Jiangbo. "Exploration of the application of thermal conductivity of bio-textile materials in wearable devices: insights from molecular biomechanics within cells." Molecular & Cellular Biomechanics 22, no. 1 (2025): 504. https://doi.org/10.62617/mcb504.

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Heat can leave the body and enter the environment in several ways, including radiation, evaporation, conduction, and convection. Heat transmission between the human body and its environment is known as thermal management, and its goal is to maintain a comfortable body temperature by generating or storing body heat. Clothing regulates body heat and moisture, preventing health issues, and environmental problems due to increased energy consumption. At the cell molecular level, bio-textile materials interact with the body’s thermoregulatory system. Cells have specific membrane proteins that act as

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18

Sazhin, S. S., V. A. Gol'dshtein, and M. R. Heikal. "A Transient Formulation of Newton's Cooling Law for Spherical Bodies." Journal of Heat Transfer 123, no. 1 (2000): 63–64. http://dx.doi.org/10.1115/1.1337650.

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Newton's law of cooling is shown to underestimate the heat flux between a spherical body (droplet) and a homogeneous gas after this body is suddenly immersed into the gas. This problem is rectified by replacing the gas thermal conductivity by the effective thermal conductivity. The latter reduces to the gas thermal conductivity in the limit of t→∞, but can be substantially higher in the limit of t→0. In the case of fuel droplet heating in a medium duty truck Diesel engine the gas thermal conductivity may need to be increased by more than 100 percent at the initial stage of calculations to acco

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19

Deschamps, Frédéric. "Stagnant lid convection with temperature-dependent thermal conductivity and the thermal evolution of icy worlds." Geophysical Journal International 224, no. 3 (2020): 1870–89. http://dx.doi.org/10.1093/gji/ggaa540.

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SUMMARY Convection is an efficient process to release heat from planetary interiors, but its efficiency depends on the detailed properties of planetary mantles and materials. A property whose impact has not yet been studied extensively is the temperature dependence of thermal conductivity. Because thermal conductivity controls heat fluxes, its variations with temperature may alter heat transfer. Here, I assess qualitatively and quantitatively the influence of temperature-dependent thermal conductivity on stagnant lid convection. Assuming that thermal conductivity varies as the inverse of tempe

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20

Zhu, Hongwei, Lingen Chen, Yanlin Ge, Shuangshuang Shi, and Huijun Feng. "Multi-Objective Constructal Design for Square Heat-Generation Body with “Arrow-Shaped” High-Thermal-Conductivity Channel." Energies 15, no. 14 (2022): 5235. http://dx.doi.org/10.3390/en15145235.

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Based on the square heat-generation body (HGB) with “arrow-shaped” high-thermal-conductivity channel (HTCC) model established in the previous literature, we performed multi-objective optimization (MOO) with maximum temperature difference (MTD) minimization and entropy-generation rate (EGR) minimization as optimization objectives for its performance. Pareto frontiers with optimal set were obtained based on NSGA-II. TOPSIS, LINMAP, and Shannon entropy decision methods were used to select the optimal results in Pareto frontiers, and the deviation index was used to compare and analyze advantages a

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21

Ankang, Kan, and Han Houde. "Effective Thermal Conductivity of Open Cell Polyurethane Foam Based on the Fractal Theory." Advances in Materials Science and Engineering 2013 (2013): 1–7. http://dx.doi.org/10.1155/2013/125267.

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Based on the fractal theory, the geometric structure inside an open cell polyurethane foam, which is widely used as adiabatic material, is illustrated. A simplified cell fractal model is created. In the model, the method of calculating the equivalent thermal conductivity of the porous foam is described and the fractal dimension is calculated. The mathematical formulas for the fractal equivalent thermal conductivity combined with gas and solid phase, for heat radiation equivalent thermal conductivity and for the total thermal conductivity, are deduced. However, the total effective heat flux is

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22

Secco, R. A., and P. S. Balog. "On the possibility of anisotropic heat flow in the inner core." Canadian Journal of Earth Sciences 38, no. 6 (2001): 975–82. http://dx.doi.org/10.1139/e00-116.

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We consider the possibility of anisotropic heat flow in the inner core by examining the potential for anisotropic thermal conductivity of hexagonal close-packed (hcp-)Fe. Because hcp-Fe exists only at pressures above 13 GPa at room temperature, we investigate thermal conductivity anisotropy in analog material Gd by measuring the electrical conductivity and applying the WiedemannFranz Law to determine thermal conductivity (k). The electrical conductivity anisotropy of Gd was measured at pressures up to 1.4 GPa and temperatures up to 873 K in the hcp phase range. At elevated pressure, the varia

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23

Ibraimov, A. I. "The Evolution of Body Heat Conductivity, Skin and Brain Size in Human." Journal of Human Ecology 21, no. 2 (2007): 95–103. http://dx.doi.org/10.1080/09709274.2007.11905956.

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Ibraimov, A. I., A. K. Kazakova, I. K. Moldotashev, M. T. Sultanmuratov, and K. S. Abdyev. "Variability of Human Body Heat Conductivity in Population II. Diseases of Civilization." Journal of Human Ecology 32, no. 2 (2010): 69–78. http://dx.doi.org/10.1080/09709274.2010.11906323.

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25

Левина, Любовь Владимировна, Виктор Борисович Пеньков, and Евгений Александрович Новиков. "Strict particular solutions of heat conductivity and thermoelasticity problems." Вестник Чувашского государственного педагогического университета им. И.Я. Яковлева. Серия: Механика предельного состояния, no. 1(51) (October 5, 2022): 115–26. http://dx.doi.org/10.37972/chgpu.2022.51.1.011.

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Рассматриваются краевые задачи для линейной термоупругой изотропнооднородной среды. Состояние среды подчинено уравнениям Дюамеля-Неймана. В случае, когда характеристики напряженно-деформированного состояния (НДС) на поверхности тела не связаны в граничных условиях (ГУ) с температурными факторами, задача декомпозируется на последовательность неоднородных задач теплопроводности и теории упругости с известной коррекцией объемных сил в уравнениях равновесия. Особое внимание обращено на способ построения частного решения задачи теплопроводности. Метод функций Грина представляет частные решения таки

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26

Li, Jing. "The Effect of Coefficient of Thermal Conductivity of Fabric-Layer on Human Body Temperature Fields." Advanced Materials Research 201-203 (February 2011): 2601–6. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.2601.

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Through founding the mathematical model of heat and mass transfer, discussing quantitatively the temperature fields distribution in the case of body wearing cloth has an important significance in the lucubrate of garment thermal comfortability. Establishment of the 2D heat transfer model about upper arm is according to the characteristics of the arm’s heat and mass transfer. The distributing of temperature fields of upper arm transverse section under human wearing varying fabrics is accepted by using finite element analysis software ANSYS. This method can be extended to the whole body temperat

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27

Danielsson, U. "Convective heat transfer measured directly with a heat flux sensor." Journal of Applied Physiology 68, no. 3 (1990): 1275–81. http://dx.doi.org/10.1152/jappl.1990.68.3.1275.

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A heat flux disk has been developed that directly measures the convective heat transfer in W/m2. When the sensor is calibrated on an aluminum cylinder, the calibration constant obtained is greatest in still air. As air movement increases, the calibration constant is reduced with increasing convective heat transfer coefficient, 0.5%.W-1.m2.K. The influence of wind on the calibration value is greatly reduced when the sensor is attached to a surface with lower thermal conductivity. The local convective heat transfer coefficient (hc) of the human body was measured. The leg acts in a manner similar

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28

Li, J. E., and B. Wang. "Conductive and Radiative Heat Transfer in Foam Materials at High Temperatures." Applied Mechanics and Materials 431 (October 2013): 192–97. http://dx.doi.org/10.4028/www.scientific.net/amm.431.192.

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At high temperatures, heat transfer in foams occurs by conductions through solid matrix and air as well as by thermal radiation propagating the structure. Starting from the analysis of different foam morphological structures, the body-centered cubic cell model is applied to predict the conductive and radiative properties. Both the open foams and the closed foams are analyzed. Temperature-dependency of the material properties is also taken into consideration. The Rosseland approximation is used to predict the radiativie conductivity. Effects of temperature, cell diameter and porosity on the equ

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Perz, Karolina, Łukasz Mamoński, and Aleksandra Rewolińska. "Influence of the color of the refrigeration body on its thermal parameters." AUTOBUSY – Technika, Eksploatacja, Systemy Transportowe 19, no. 12 (2018): 589–92. http://dx.doi.org/10.24136/atest.2018.458.

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The article discusses the issue of the impact of the color of refrigeration bodies on the thermal parameters of insulation. The tests of the density of heat flux flowing through metal claddings were carried out, and then their heat transfer coefficient was calculated on their basis. In the further part of the article, the influence of the body colour on the thermal conductivity of a three-layer wall consisting of an insulating core (expanded polystyrene) and two external claddings of different colour was analyzed. On the basis of the obtained results, it can be stated that the colour of the bo

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Zarubin, V. S., G. N. Kuvyrkin, I. Yu Savelyeva, and A. V. Zhuravsky. "Conditions for a Thermal Explosion in the Plate under Convective-Radiation Heat Transfer." Herald of the Bauman Moscow State Technical University. Series Natural Sciences, no. 6 (93) (December 2020): 48–59. http://dx.doi.org/10.18698/1812-3368-2020-6-48-59.

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The processes of obtaining and storing energy-saturated substances are characterized by energy release in their volume. The intensity of this energy release increases with increasing temperature. The stability of the stationary temperature state of a solid with a temperature-dependent intensity of volumetric energy release is directly related to the conditions of heat transfer of this body with the environment. If the heat energy released in the volume of the body can no longer be diverted into the environment, the steady temperature state of the body becomes impossible. The paper studies the

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Zarubin, V. S., O. V. Novozhilova, and E. S. Sergeeva. "Two-sided Estimates of Thermal Conductivity Coefficient of a Porous Body Skeleton." Mathematics and Mathematical Modeling, no. 3 (August 3, 2018): 45–60. http://dx.doi.org/10.24108/mathm.0318.0000122.

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Porous composite materials are widely used in engineering as structural and heat-insulating materials. The presence of pores in such materials is due to both the technology of their manufacture and the operating conditions.One of the most important factors in the process of designing products from a porous composite is the complex of thermophysical characteristics of the material. This characteristic determines the application area of the material.Among the thermophysical properties the leading role is played by the coefficient of thermal conductivity. This coefficient for some porous material

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Huan, Chao, Sha Zhang, Xiaoxuan Zhao, et al. "Thermal Performance of Cemented Paste Backfill Body Considering Its Slurry Sedimentary Characteristics in Underground Backfill Stopes." Energies 14, no. 21 (2021): 7400. http://dx.doi.org/10.3390/en14217400.

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The combined mine backfill–geothermal (CMBG) system can be used to effectively extract geothermal energy by installing a heat exchange tube (HET) in the underground backfilled stopes of mines, which can be used as the heat supply for buildings in mines and the surrounding areas. The efficient performance of this system strongly depends on the thermal exchange process between the HET and its surrounding cemented paste backfill body (CPB). In this study, a validated simulation model is established to investigate the heat exchange performance of CPB, in which the nonuniformly distributed thermal

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Camin, B., C. Dinh, J. Streckenbach, M. Gille, and E. Uhlmann. "Effect of the heat treatment on the microstructure of carbide tool electrodes for electrical discharge drilling." Practical Metallography 61, no. 4 (2024): 232–49. http://dx.doi.org/10.1515/pm-2024-0020.

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Abstract Carbide tool electrodes for electrical discharge drilling were subjected to heat treatment at various temperatures and in different atmospheres for the same duration, respectively, in order to reduce the electrical conductivity of the lateral surface. Hardness tests show that the heat treatment does not induce a loss of strength in the electrode body. Microscopic analyses revealed that the lateral surface, characterized by a two-layer structure comprising a surface and a diffusion layer of varying characteristics and morphology, such as surface roughness, degree of coverage, delaminat

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Ismail, Nova Risdiyanto, Purbo Suwandono, Dadang Hermawan, and Hangga Wicaksono. "Analysis of type and dimension of sand forming mortar material on effective heat conductivity]." TEKNIK 44, no. 3 (2023): 230–40. http://dx.doi.org/10.14710/teknik.v44i3.43966.

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The solar radiation heat absorbing plate is a major component in solar still applications. The fin absorber plate with mortar material as a heat absorber, heat transfer, and evaporation medium. In the fin absorber plate with mortar material, seawater flows inside the fin body capillarity and undergoes an evaporation process, leaving salt in the pores. Salt in the pores, type, and dimension of sand as the main forming material of mortar will also affect the effective heat conductivity value. This study evaluates salt formation in the pores with various types and dimensions of sand-forming morta

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Zhang, Fengyin, Huijun Feng, Lingen Chen, Jiang You, and Zhihui Xie. "Constructal Design of an Arrow-Shaped High Thermal Conductivity Channel in a Square Heat Generation Body." Entropy 22, no. 4 (2020): 475. http://dx.doi.org/10.3390/e22040475.

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A heat conduction model with an arrow-shaped high thermal conductivity channel (ASHTCC) in a square heat generation body (SHGB) is established in this paper. By taking the minimum maximum temperature difference (MMTD) as the optimization goal, constructal designs of the ASHTCC are conducted based on single, two, and three degrees of freedom optimizations under the condition of fixed ASHTCC material. The outcomes illustrate that the heat conduction performance (HCP) of the SHGB is better when the structure of the ASHTCC tends to be flat. Increasing the thermal conductivity ratio and area fracti

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Wang, Wen Yi, Kwok Tung Hui, Chi Wai Kan, et al. "A Study of Thermal Conductivity Property of Socks." Materials Science Forum 1007 (August 2020): 118–24. http://dx.doi.org/10.4028/www.scientific.net/msf.1007.118.

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Socks fabrics seem a minor clothing in apparel categories but are indispensable item for daily activities for users. The function of socks is either for heat insulation of body temperature in cold weather or heat releasing to keep thermal neutral for foot in hot weather. Socks with good quality are conducive to prevent foot disease or smelly odor from foot. The wearing comfort of socks can be affected by the fabric properties of thermal transfer. The present study aims to investigate the relationship between the fabric parameters and thermal conductivity property of knitted socks fabric. The p

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Mahale, Vishal, and Jayashree Bijwe. "Role of thermal conductivity in controlling the tribo-performance of non-asbestos organic brake-pads." Journal of Composite Materials 54, no. 27 (2020): 4145–55. http://dx.doi.org/10.1177/0021998320928124.

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The range of thermal conductivity of friction materials is a critical issue since lower thermal conductivity leads to accumulation of frictional heat on the working surface, which results in excessive fade, while higher thermal conductivity leads to excessive heat flow towards back-plate resulting to “spongy brakes”. Therefore, thermal conductivity of the friction materials across the brake-pads should not be high while along the length of brake-pad; it should be high. To enhance the thermal conductivity, metals in the form of powder or fibres are used in the friction materials. Apart from imp

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AKMALAIULY, KENZHEBEK, and ZHANAR ZHUMADILOVA. "INFLUENCE OF FILLER QUALITY ON CONCRETE THERMAL CONDUCTIVITY." Periódico Tchê Química 17, no. 34 (2020): 67–79. http://dx.doi.org/10.52571/ptq.v17.n34.2020.85_p34_pgs_67_79.pdf.

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Studies on the effect of grain composition on the thermal conductivity of lightweight concrete, it was shown that the mineral composition of filler (aggregates) substantially reflects the thermal conductivity and density of concrete. The grains of the component have a slightly higher effect on the thermal conductivity than the material itself. The proof of this position is that the thermal conductivity of bulk materials is always slightly lower than cellular materials of the same average density. In an absolutely dry porous body, heat transfer can occur not only through thermal conductivity bu

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Ibraimov, A. I., A. K. Kazakova, I. K. Moldotashev, M. T. Sultanmuratov, and K. S. Abdyev. "Variability of Human Body Heat Conductivity in Population I. Methodological and Theoretical Approaches." Journal of Human Ecology 32, no. 1 (2010): 1–22. http://dx.doi.org/10.1080/09709274.2010.11906316.

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Ibraimov, AI. "Chromosomal Q-heterochromatin Variability and Sport." International Journal Of Biology And Medicine 1, no. 1 (2019): 45–52. https://doi.org/10.36811/ijbm.2019.110006.

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In the process of studying the variability of chromosomal Q-heterochromatin regions (Q-HRs) in human populations living permanently in different climatogeographic conditions of Eurasia and Africa, as well as in newcomers, who have successfully adapted to some extreme natural conditions, the data were obtained that, perhaps, the amount of this genetic material in the genome may be important for some sports. In particular, it turned out that in the genome of mountaineers the number of chromosomal Q-HRs was significantly lower than in the control sample and was close to that of the high-altitude

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Shariff, Khairul Anuar, Muhammad Syahir Juhari, Lynette Wei Ling Chan, and Shah Rizal Kasim. "Effect of Different Firing Temperature on Thermal Conductivity of Ceramic Tiles." Materials Science Forum 1010 (September 2020): 665–71. http://dx.doi.org/10.4028/www.scientific.net/msf.1010.665.

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The aim of this study is to investigate the effect of different firing temperature on thermal conductivity of ceramic tiles. The body formulation powders of ceramic tiles were made according to the formulation given by company and compacted at 18 MPa using pressing machine in order to obtain button shape specimen with 50 mm diameter. The button shape specimen was fired at different firing temperature which 1150°C, 1175°C, 1200°C and 1225°C. Then, the thermal conductivity of fired specimens was measured by using Hot-Disk Thermal Constant Analyzer. Thermal conductivity result shows that the cera

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Куликов, А. А., И. В. Иванова, and И. Н. Дюкова. "Methodological features of the description of thermal conductivity processes." Известия СПбЛТА, no. 249 (September 1, 2024): 166–76. http://dx.doi.org/10.21266/2079-4304.2024.249.166-176.

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В физической модели процесса теплопроводности анализируется роль скорости, с которой в сплошной среде распространяется энергия. На базе общего определения вектора плотности энергии даётся основное определение вектора плотности теплового потока и выводится формула для определения объёмной плотности энергии, переносимой за счёт теплопроводности. Для общего случая выводится формула расчёта распределения локальной поверхностной плотности теплового потока на произвольной поверхности, принадлежащей телу, при известном поле вектора плотности теплового потока. In the physical model, the role of the ve

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Krys'ko, Vadim, Olga Saltykova, and Alexey Tebyakin. "ANALYTICAL SOLUTION OF THE EQUATION OF CONDUCTIVITY FOR VARIOUS BOUNDARY CONDITIONS." Automation and modeling in design and management 2019, no. 4 (2019): 33–37. http://dx.doi.org/10.30987/2658-3488-2019-2019-4-33-37.

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The aim of the work is to obtain an analytical solution of the heat equation for various boundary conditions in the case of a two-dimensional body. As a solution method, the method of variational iterations is used. In the work, both an analytical and a numerical solution of the problem are obtained for the boundary conditions of various types and taking into account the internal heat source. To obtain a numerical solution, the finite difference method was used. The results are compared and the conclusion is made on the reliability of the decisions.

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Wahyudi, Slamet, Raf'ie Yusuf, Alfiansyah Firdhani, and Zulfa Salsabila Rafiya Firdaus. "Studi Distribusi Temperatur Pada Kulit Manusia yang mengalami Cryotherapy dengan Finite Difference Method (FDM)." Jurnal Rekayasa Mesin 12, no. 3 (2021): 757–65. http://dx.doi.org/10.21776/ub.jrm.2021.012.03.25.

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Biological heat transfer studies the transfer of heat in biological systems from inside the human body or from outside to inside the body. The biological heat transfer equation uses the Pennes equation, which applies to the layers of skin made up of the epidermis, dermis, fat, and muscle. This investigation solves the biological heat transfer equation to obtain a one-dimensional unstable temperature distribution in human skin layers subjected to cryotherapy with cold packs at temperatures of 278 K and 283 K using the finite difference method (FDM). The results show that cold compresses influen

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Formalev, V. F., S. A. Kolesnik, and B. A. Garibyan. "Heat Transfer with Absorption in Anisotropic Thermal Protection of High-Temperature Products." Herald of the Bauman Moscow State Technical University. Series Natural Sciences, no. 5 (86) (October 2019): 35–49. http://dx.doi.org/10.18698/1812-3368-2019-5-35-49.

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The purpose of the research was to study the non-stationary heat transfer in anisotropic thermal protection under the action of unsteady heat flows distributed along the body, when there are thermal energy sinks inside the body, the energy being proportional to temperature, due to endothermic physical and chemical transformations. Thermal protection is made of anisotropic material, such as phenol-formaldehyde fiberglass, asboplastics, carbon-carbon plastics, etc. A new analytical solution has been obtained for the problem of plate heating under the action of unsteady heat flows distributed alo

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Yang, Yang, Fangbo Chen, Siliu Yu, et al. "Investigating the Formation of Hot-Dry Rock in Gonghe Basin, Qinghai, China." Minerals 13, no. 8 (2023): 1103. http://dx.doi.org/10.3390/min13081103.

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The Gonghe Basin, Qinghai Province, China, has rich geothermal and hot-dry rock resources. Through a magnetotelluric survey line with 400 points, combined with regional geology data, the deep geoelectrical structural background and thermal source mechanisms of the Gonghe Basin were explored. The results showed that (1) a deep structure with high conductivity may exist at a depth of 15 km in the basin, and could be compared to the layer-shaped, low-velocity, high-conductivity structure in the eastern part of the Qinghai–Tibet Plateau; (2) the rushing reverse fault played a crucial role in heat

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Bejan, Adrian. "From Heat Transfer Principles to Shape and Structure in Nature: Constructal Theory." Journal of Heat Transfer 122, no. 3 (2000): 430–49. http://dx.doi.org/10.1115/1.1288406.

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This lecture reviews a relatively recent body of heat transfer work that bases on a deterministic (constructal) principle the occurrence of geometric form in systems with internal flows. The same principle of global optimization subject to constraints allow us to anticipate the natural (animate and inanimate) flow architectures that surround us. The lecture starts with the example of the optimal spatial distribution of material (e.g., heat exchanger equipment) in power plants. Similarly, void space can be allocated optimally to construct flow channels in the volume occupied by a heat generatin

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Gorbynov, V. A., G. A. Perevezentsev, S. S. Teplyakova, and M. N. Mechtaeva. "Methodology to determine coefficients of effective thermal conductivity when heating porous bodies using fractal-like structures." Vestnik IGEU, no. 1 (February 28, 2022): 5–11. http://dx.doi.org/10.17588/2072-2672.2022.1.005-011.

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Thermal insulation, porous composite, ceramic, charge materials are frequently used in the energy industry. The materials are heat treated to improve the structure and give them the desired properties required for specific production conditions. The important task is to assess the influence of geometric parameters of the fractal-like structure and radiation heat transfer on the thermophysical properties of porous bodies. For numerical description of porous bodies, the technique of replacing geometry of porous body with the bodies with a fractal-like structure having self-similarity properties

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Ecsedi, István, and Attila Baksa. "A steady-state heat conduction problem of a nonhomogeneous conical body." Journal of Computational and Applied Mechanics 16, no. 2 (2021): 87–97. http://dx.doi.org/10.32973/jcam.2021.006.

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Numerous studies and textbooks deal with the steady-state thermal conduction of radially nonhomogeneous circular cylinder. In contrast, there are relatively few studies on the thermal conduction problems of conical solid bodies. This study is intended as a modest contribution to the solution of thermal conductance problems of nonhomogeneous conical bodies. A one-dimensional steady-state heat conduction in nonhomogeneous conical body is considered. The thermal conductivity of the hollow conical body in a suitable chosen spherical coordinate system depends on the polar angle but is independent o

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Hayvas, Bogdana, and Veronika Dmytruk. "Quasi-averaged formulation of Stefan's linear problem in drying of cylindrical beam." Physico-mathematical modelling and informational technologies, no. 31 (July 14, 2021): 13–21. http://dx.doi.org/10.15407/fmmit2021.31.013.

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In the process of drying of porous materials there is a moving surface separating the dried and wet areas in the body. This surface is a phase transition, which significantly depends on the properties of the material and the temperature, which is due to the external influence of the drying agent and is a function of coordinates and time, and the movement of boundaries is a consequence of phase transitions. The paper presents the properties of the material, namely: heat capacity, density, thermal conductivity coefficients to be the functions of the porosity of the material, densities and heat c

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