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Journal articles on the topic 'Wall Temperature'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Luo, Yi Ying, Xiao Yan Wu, Yi Xiang, and Zhi Rong Niu. "Temperature Comparison of External Thermal Insulation Wall Using Foam Glass under Thermal and Humidity Effect." Advanced Materials Research 873 (December 2013): 257–66. http://dx.doi.org/10.4028/www.scientific.net/amr.873.257.

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Experiments are performed aiming at the hot summer and cold winter area climate characteristics. The BWNH-3021 type weather-resistant testing apparatus is used to achieve performances of foam glass exterior thermal insulation walls. Real-time temperatures of each functional layer are tested under hot rain cycle effect. The temperature curves are plotted to make comparisons. When the environment temperature rises about 60°C, the temperatures of primary wall will rise only 8.20°C9.30°C each in 1#2# testing wall. When cold water is suddenly sprayed, the environment temperature will fall about 51°

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2

Mu, Dawei, Xiaoyong Yang, and Yixian Zhang. "Study on the Effect of Plant Growth on the Power Generation Performance of CdTe Photovoltaic Glass Curtain Walls." Applied Sciences 15, no. 4 (2025): 1756. https://doi.org/10.3390/app15041756.

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The high summer temperatures of PV (photovoltaic) glass curtain walls lead to reduced power generation performance of PV modules and increased indoor temperatures. To address this issue, this study constructed a test platform for planted photovoltaic glass curtain walls to investigate the effect of plants on their power generation performance. The study’s results indicate the following: (1) reducing the average surface temperature of the surface temperature measurement instrument for the photovoltaic glass curtain wall by 13.6 °C can increase its average power generation capacity by 76 w, demo

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3

Chin, J. S., A. H. Lefebvre, and F. T. Y. Sun. "Temperature Effects on Fuel Thermal Stability." Journal of Engineering for Gas Turbines and Power 114, no. 2 (1992): 353–58. http://dx.doi.org/10.1115/1.2906596.

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The thermal stability characteristics of four kerosine-type fuels are examined using a heated-tube apparatus that allows independent control of fuel pressure, fuel temperature, tube-wall temperature, and fuel flow rate. It is a closed loop system, and fuel flows through the heated tube for periods ranging from 6 to 22 h. The deposition rates of carbon on the tube walls are measured by weighing the tube before and after each test. The results obtained show that tube-wall and fuel temperatures both have a marked influence on deposition rates, the impact of fuel temperature being stronger than th

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Li, Jiayu, Bohong Zheng, Wenquan Shen, Yanfen Xiang, Xiao Chen, and Zhiyong Qi. "Cooling and Energy-Saving Performance of Different Green Wall Design: A Simulation Study of a Block." Energies 12, no. 15 (2019): 2912. http://dx.doi.org/10.3390/en12152912.

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To mitigate the urban heat island (UHI) and release the low carbon potential of green walls, we analyzed the cooling and energy-saving performance of different green wall designs. Envi-met was applied as the main simulation tool, and a pedestrian street named Yuhou Street was selected as the study object. Four designs of walls were summarized and simulated, demonstrating the living wall system (LWS). Super soil had superiority in cooling and energy saving. Outdoor air temperature, indoor air temperature, outside wall surface temperature, and inside wall surface temperature were analyzed. Apart

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Umnyakova, N. P. "ENGINEERING METHOD FOR CALCULATING THE TEMPERATURE ON THE INNER SURFACE OF THE OUTER CORNER OF A BUILDING." Russian Journal of Building Construction and Architecture, no. 4(52) (November 19, 2021): 7–19. http://dx.doi.org/10.36622/vstu.2021.52.4.001.

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Statement of the problem. The temperature on the inner surface of the outer corner is always lower than on the inner surface of the outer wall. This temperature difference might lead to the formation of condensation on the inner surface of the wall at low outdoor temperatures. Therefore the problem of developing an engineering method for calculating the temperature in the outer corner to exclude the possibility of condensation on the inner surface in the design process of the outer wall structures is extremely relevant. Results. To address this problem, based on solving the heat balance equati

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Jellaj, Sabrina, Salma Ouhaibi, Naoual Belouaggadia, Laidi Zahiri, and Khalifa Mansouri. "Numerical study on the thermal performance of new composite wall with phase change material in a building located in Marrakech." E3S Web of Conferences 469 (2023): 00036. http://dx.doi.org/10.1051/e3sconf/202346900036.

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Phase change materials (PCMs) hold promise for enhancing building energy efficiency. Smart walls with PCMs effectively control indoor temperatures, reducing heating and cooling energy use. This study examines five PCM configurations within a smart wall, including a reference wall, PCM1 wall, PCM2 wall, a dual PCM wall, and a novel configuration in Marrakech, Morocco. The primary aim is to find the most effective configuration for improving smart wall thermal performance. We employ numerical simulations in the ANSYS CFD environment to analyze the transient thermal behavior of walls with varying

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7

Żelazny, Henryk. "Assessment of the possibility of profiting from solar energy through the use of walls with external sheet metal cladding." E3S Web of Conferences 45 (2018): 00105. http://dx.doi.org/10.1051/e3sconf/20184500105.

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The possibility of profiting from solar radiation through external walls was studied for an experimental, windowless livestock building. Temperature measurements on the wall surfaces were taken during winter, in two measuring series. On the first day, the average sol-air temperature on the outer surface of the east-facing wall was 7.4 °C and was even up to 2.2 °C lower than temperature of the outdoor air which was 9.6 °C. With the averaged temperature of inner surface of the wall reaching 21.3 °C, heat transfer form the outside into the building was impossible. An identical tendency in tempera

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8

Muthuraj, R., and S. Srinivas. "Influence of magnetic field and wall slip conditions on steady flow between parallel flat wall and a long wavy wall with Soret effect." Journal of Naval Architecture and Marine Engineering 6, no. 2 (2010): 62–71. http://dx.doi.org/10.3329/jname.v6i2.3061.

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The steady MHD flow in the presence of temperature dependent heat source in a viscous incompressible fluid bounded by a parallel flat wall and a long wavy wall is studied with heat and mass transfer, taking into account the thermal-diffusion (Soret) effects, when the no-slip condition at the channel wall in no longer valid. An external uniform magnetic field and a uniform suction are applied perpendicular to the flat wall. The walls are kept at different but constant temperatures. The velocity, temperature and concentration field have been evaluated numerically for various values of the parame

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9

Hao, Shimeng, Yuejia Xu, Changming Yu, Yehao Song, and Zhenghao Lin. "Experimental Investigation of the Surface Temperature Distribution and Thermal Performance of an Intermittent Combustion Chinese Heated Wall." Advances in Materials Science and Engineering 2018 (September 25, 2018): 1–13. http://dx.doi.org/10.1155/2018/3457950.

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Chinese heated walls represent a traditional space heating technique that is still widely used in vernacular houses in northern China. Such walls efficiently recover gas heat from heating stoves and reduce users' exposures to indoor air pollution. This experimental study proposed a heat recovery system composed of a heated wall and fireplace. Test rooms were set up to evaluate the surface temperature distribution and thermal performance of the heated wall in response to several combustion patterns. The results show that an intermittent combustion heated wall heated only by a stove used for coo

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10

Lv, Liugen, Yi Xiang, and Chen Huang. "Building thermal environment solution model and radiation heat transfer calculation model based on Gebhart absorption coefficient." Advances in Mechanical Engineering 15, no. 2 (2023): 168781322311532. http://dx.doi.org/10.1177/16878132231153286.

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The building walls temperatures are different, and there are radiation heat transfers between the walls, which have the characteristics of multiple reflections and multiple absorptions. The Gebhart absorption coefficient considers the radiation energy both directly absorbed by the wall and indirectly absorbed by other walls multiple times reflections. The absorption coefficient Gij is used to represent the proportion of radiation energy absorbed by surface j from the radiation energy of surface i. Through employing Gebhart absorption coefficient, the Gebhart absorption coefficient matrix is co

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11

Martin, Chris A., and Dewayne L. Ingram. "Container Dimension Affects Rooting Medium Temperature Patterns." HortScience 28, no. 1 (1993): 18–19. http://dx.doi.org/10.21273/hortsci.28.1.18.

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Computer modeling was used to study the effect of container volume and shape on summer temperature patterns for black polyethylene nursery containers filled with a 4 pine bark: 1 sand (v/v) rooting medium and located in Phoenix, Ariz. (lat. 33.5°N, long. 112°W) or Lexington, Ky. (lat. 38.0°N, long. 84.4°W). For both locations, medium temperatures were highest at the east and west container walls, halfway down the container profile, regardless of container height (20 to 50 cm) or volume (10 to 70 liters). The daily maximum medium temperature (Tmax) at the center was lower and occurred later in

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12

Wang, Bingzhi, and Yanan Li. "Analysis of thermal energy storage system for energy saving reconstruction of building in region with heating provision and high sunshine." Thermal Science 24, no. 5 Part B (2020): 3079–87. http://dx.doi.org/10.2298/tsci191028082w.

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This research aims to analyze the effect of phase change energy storage wall on the internal thermal environment in high-sunshine passive solar residential buildings. The residential buildings in Lhasa are taken as research objects, and the differences in indoor and outdoor thermal environments of the residential buildings in winter are first evaluated. Then, the energy storage wall model based on phase change material is constructed, the meteorological data of the winter solstice day is used to simulate, and the changes of the thermal environment in the room are detected. The results showed t

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13

Yan, Liyun, Jiang Pu, Xueling Li, et al. "Experimental Study on Temperatures of Water Walls in a 1000 MW Ultra-Supercritical Boiler under the Condition of Flexible Peak Regulation." Energies 17, no. 17 (2024): 4375. http://dx.doi.org/10.3390/en17174375.

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To meet the Chinese government’s energy-saving and emission-reduction policies, flexible peak regulation is necessary for traditional coal-fired boilers. Flexible peaking leads to large changes in boiler load, which affects the safety of the boiler water wall. In this paper, a 1000 MW ultra-supercritical unit was tracked for three years, and effective data were selected to study the temperature characteristics of the water wall under flexible peak regulation. The results show that the lower the load, the greater the temperature fluctuation of the water wall. The temperature distribution of the

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14

Cone, J. W., and F. M. Engels. "Influence of growth temperature on anatomy and in vitro digestibility of maize tissues." Journal of Agricultural Science 114, no. 2 (1990): 207–12. http://dx.doi.org/10.1017/s002185960007221x.

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SUMMARYTissues of maize grown under different temperature regimes showed remarkable differences in anatomical and chemical properties and in vitro digestibility. A high temperature regime (12 h at 30 °C and 12 h at 24 °C) resulted in decreased cell wall thickness, cell diameter and cell wall yield, doubled lignin content and decreased in vitro digestibility, compared with plants grown under a low temperature regime (12 h at 18 °C and 12 h at 12 °C). A reduction in intensity of staining for lignin was observed in plants grown at 30/24 °C. Cell wall digestibility was thought to be limited by an

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15

Gouws, S., and M. Gouws. "Thermally regulated green living wall." South African Journal of Chemistry 76 (2022): 91–96. http://dx.doi.org/10.17159/0379-4350/2021/v76a13.

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Green living walls can improve the aesthetic quality of a building and moderate the temperature within it. The purpose of this paper is to examine whether the green wall has any effect on the interior temperature of the building in the hot and cold months of the year. Temperatures on an outside wall as well as on research and control areas were monitored to capture temperature data for a one-year period that encompassed all seasons: sunny, cold and wet. The findings of this research contribute to the knowledge of the effects provided by green living walls in terms of cooling and heating, the i

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16

FÜLÖP, TAMÁS, HITOSHI MIYAZAKI, and IZUMI TSUTSUI. "QUANTUM FORCE DUE TO DISTINCT BOUNDARY CONDITIONS." Modern Physics Letters A 18, no. 40 (2003): 2863–71. http://dx.doi.org/10.1142/s0217732303012799.

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We calculate the quantum statistical force acting on a partition wall that divides a one-dimensional box into two halves. The two half boxes containing the same (fixed) number of noninteracting bosons are kept at the same temperature, and admit the same boundary conditions at the outer walls; the only difference is the distinct boundary conditions imposed at the two sides of the partition wall. The net force acting on the partition wall is nonzero at zero temperature and remains almost constant for low temperatures. As the temperature increases, the force starts to decrease considerably, but a

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17

Hu, Jun. "Thermal energy modelling system for green energy application of exterior wall under smart home building." Thermal Science 27, no. 2 Part A (2023): 1151–58. http://dx.doi.org/10.2298/tsci2302151h.

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In order to solve the problem of poor heat storage capacity of traditional thermal insulation materials, the author proposed a building thermal simulation study of PCM wall under smart home buildings. The author chose urea-formaldehyde resin microcapsule with 60% mass fraction of paraffin as the research object, and gave the structure of the study wall. After determining the physical parameters of PCM, the phase change wall is simulated and analyzed, and the simulation results are compared with the experimental results used to verify the accuracy of the model. The internal temperature of phase

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18

Matvienko, Oleg, Olga Daneyko, and Tatiana Kovalevskaya. "Mathematical Modeling of Plastic Deformation of a Tube from Dispersion-Hardened Aluminum Alloy in an Inhomogeneous Temperature Field." Crystals 10, no. 12 (2020): 1103. http://dx.doi.org/10.3390/cryst10121103.

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The effect of temperature distribution on a stress–strain state tube made of disperse-hardened aluminum alloy subjected to internal pressure was investigated. The mathematical model is based on equations of physical plasticity theory and principles of mechanics of deformable solids. The results of this investigation demonstrate that varying the outer wall temperature in the range of 200 K at a fixed temperature of the inner wall leads to a significant change in the plastic resistance limit (for the considered tube sizes, this change is approximately 15%). An increase of the tube wall temperatu

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19

Salanga, M., and K. Van Winkle-Swift. "Structure and Function of the Primary Zygote Wall of Chlamydomonas Monoica." Microscopy and Microanalysis 7, S2 (2001): 50–51. http://dx.doi.org/10.1017/s1431927600026325.

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The Chlamydomonas zygospore is formed after gametic cell fusion by a progression of ultrastructural and physiological changes, including the synthesis of a protective and elaborately sculptured secondary wall (Figure 1). Assembly of the secondary wall occurs within the confines of a transient primary zygote wall, synthesized immediately after gamete fusion, and assembled beneath the residual gamete walls. Upon completion of secondary wall assembly, the primary zygote wall is shed from the maturing zygospore (Figure 2). This primary zygote wall, composed primarily of a β-1,3 glucan (callose), m

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20

Loose, V. V., K. B. Gurieva, S. L. Beletsky, and T. G. Kostromina. "Temperature change of the wall layers of wheat grain during its storage in silos of elevators." Khleboproducty 31, no. 5 (2022): 50–59. http://dx.doi.org/10.32462/0235-2508-2022-31-5-50-59.

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Conducting research to clarify the mechanism of temperature migration inside reinforced concrete silos is relevant, since there is little data in the literature on the study of the dynamics of changes in internal temperatures in reinforced concrete silos, more over, they were obtained quite a long time ago. The purpose of experimental research is to study the dynamics of grain temperature change in the center of the silo in the traditional way using thermal suspensions, as well as a long horizontal layers, to determine the thickness of the near wall grain layer subject to the greatest heating

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21

Niu, Zhi Rong, Hou Ren Xiong, Zong Min Yu, Yi Xiang, and Yi Ying Luo. "Monitoring and Analysis on Temperature for External Foam Glass Thermal Insulating System on Walls under Weathering Test." Applied Mechanics and Materials 71-78 (July 2011): 3918–24. http://dx.doi.org/10.4028/www.scientific.net/amm.71-78.3918.

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The external foam glass thermal insulating system on walls has become a new thermal insulation wall system in china's building wall, It is green energy - saving building wall product with good prospect and used for wall thermal insulation of building. In this paper, real-time monitoring with thermal sensor and analysis on temperature for external foam glass thermal insulating system on walls by weathering test in Jiaxing area, and study on temperature distribution for each layer of walls. The experiment showed that, the external foam glass thermal insulating system on walls caused by foam glas

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22

Paull, Naomi, Daniel Krix, Fraser Torpy, and Peter Irga. "Can Green Walls Reduce Outdoor Ambient Particulate Matter, Noise Pollution and Temperature?" International Journal of Environmental Research and Public Health 17, no. 14 (2020): 5084. http://dx.doi.org/10.3390/ijerph17145084.

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Green walls have previously demonstrated the capacity to reduce particulate matter (PM), noise pollution, and temperature conditions in manipulative experiments and computational models. There is, however, minimal evidence that green walls can influence ambient environmental conditions, especially taking into account the variable environmental conditions encountered in situ. The aim of this paper was to determine if green walls have a quantitative effect on ambient air quality in an urban environment. Ambient PM, noise, and temperature were recorded at 12 green wall and adjacent reference wall

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23

Abdul Rahman, S. Syed, and K. S. Satyanarayanan. "Experimental and Numerical Simulation of Effects of High Temperature on RC Frame Infilled with Sandwich Panel." Civil Engineering Journal 10, no. 1 (2024): 280–98. http://dx.doi.org/10.28991/cej-2024-010-01-018.

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This study investigated the structural behavior of reinforced concrete (RC) frames infilled with masonry walls and polyurethane (PU) sandwich wall panels at elevated temperatures. This study aims to assess the influence of temperature on the stiffness and load-carrying capacity of infilled frames, optimize the thickness of the sandwich wall panel, and compare the performance of masonry and sandwich infill systems. Analytical investigations were conducted using finite element analysis software (ABAQUS) to simulate the behavior of the frames at elevated temperatures and consider various configur

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Ornam, Kurniati, Surjamanto Wonorahardjo, Sugeng Triyadi, and Masykur Kimsan. "Thermal Behaviour and Micro Climate Studies of Several Wall Insulation on Houses in a Tropical Climate (Aw) Area." IOP Conference Series: Earth and Environmental Science 1058, no. 1 (2022): 012019. http://dx.doi.org/10.1088/1755-1315/1058/1/012019.

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Abstract Standard brick walls have caused a gradual increase in the area’s temperature due to the bricks’ emissivity. Therefore, several effective technologies to overcome this problem have been proposed, one of which is thermal insulation by covering the outer walls of bricks from exposure to sunlight. This study compares thermal insulation effectiveness with Glass Fiber Reinforced Cement (GRC) and Expanded Polystyrene (EPS) material to obtain better insulations. This study is performed by modeling the area of 4 housing units using ENVI-met V4 in a humid tropical climate, focused in an east-w

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Zhang, Tianhu, Hai Wang, Jieran Ding, Shoufeng Tang, Deling Yuan, and Yandi Rao. "Transient Simulation of the Thermal Performance of a Novel Phase Change Material Trombe Wall." Coatings 15, no. 3 (2025): 303. https://doi.org/10.3390/coatings15030303.

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The Trombe wall is a typical passive building technique. To enhance the thermal performance of Trombe walls, a novel Trombe wall structure incorporating two phase change material (PCM) layers was designed. A numerical model of the PCM Trombe wall was established and validated against the experimental results. To explore the thermal performance of this PCM Trombe wall system, actual meteorological conditions were incorporated into the numerical simulations. Under transient conditions, the indoor temperature and velocity during the thermal storage and release stages were analyzed. Compared to co

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26

Abdykalykov, Akymbek, Erkin Boronbaev, Ulukbek Begaluev, Kamoliddin Holmatov, and Nurbubu Zhyrgalbaeva. "Building wall corner structures, its microclimate and seismic resistance." E3S Web of Conferences 263 (2021): 04051. http://dx.doi.org/10.1051/e3sconf/202126304051.

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Widespread low-rise residential buildings with a seismically resistant concrete frame and brick infill walls have lower microclimate levels in cold seasons due to low temperatures on the inner wall corner surfaces.These temperatures are lower if there is a corner column. For Bishkek, this temperature is 4.6 °C lower than that for permissible microclimate, even when the external wall has the required 70 mm of mineral wool slab insulation. It is caused by the negative effect of the wall corner thermal bridge. This effect is determined by ArchiCAD 20 software packages by visualizing the temperatu

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27

Ferdousi, Sayeda Fahmida, and Md Abdul Alim. "Effects on Two Semi-Circular Wall Heaters Attached with a Rectangular Enclosure Containing Trapezoidal Heated Obstacle in Presence of Magnetohydrodynamics." International Journal of Research and Innovation in Social Science VIII, no. XI (2024): 2479–87. https://doi.org/10.47772/ijriss.2024.8110192.

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This analytical investigation illustrates the effects of magnetohydrodynamics mixed convection in a rectangular enclosure containing trapezoidal heated obstacle on two semi-circular wall heaters. The upper wall moves with a velocity in the positive -direction and two semi-circular wall heaters are placed at the bottom wall with fixed distance between them. Trapezoidal heated obstacle is located in the middle of the cavity. Two vertical walls are kept at low temperature and concentration and the trapezoidal obstacle and two semi-circular walls are kept at high temperature and concentration. Als

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28

Han, J. C., Y. M. Zhang, and Kathrin Kalkuehler. "Uneven Wall Temperature Effect on Local Heat Transfer in a Rotating Two-Pass Square Channel With Smooth Walls." Journal of Heat Transfer 115, no. 4 (1993): 912–20. http://dx.doi.org/10.1115/1.2911387.

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The influence of uneven wall temperature on the local heat transfer coefficient in a rotating, two-pass, square channel with smooth walls is investigated for rotation numbers from 0.0352 to 0.352 by varying Reynolds numbers from 25,000 to 2500. The two-pass square channel, composed of 12 isolated copper sections, has a length-to-hydraulic diameter ratio of 12. The mean rotating radius to the channel hydraulic diameter ratio is kept at a constant value of 30. Three cases of thermal boundary conditions are studied: (A) four walls at the same temperature, (B) four walls at the same heat flux, and

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29

Wang, Ke, and Youli Song. "Experimental study on combustion optimization of four-corner tangential boiler for alleviating high temperature corrosion." E3S Web of Conferences 360 (2022): 01044. http://dx.doi.org/10.1051/e3sconf/202236001044.

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In order to reduce the volume fraction of H2S in the water wall area of the four-corner tangential boiler and achieve the purpose of alleviating the high temperature corrosion of the water wall, a thorough test was carried out on the 600MW boiler. The results show that the high temperature corrosion of the water wall under high load is obviously more serious than that under low load, the high temperature corrosion of the water wall of the front wall is more serious than that of the other walls, and the high temperature corrosion of the furnace wall area downstream of the burner is generally hi

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Yordanov, Krastin, Iliya Hadzhidimov, and Penka Zlateva. "Electronic equipment measuring device for heat quantity through a flat wall." E3S Web of Conferences 207 (2020): 01006. http://dx.doi.org/10.1051/e3sconf/202020701006.

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In the paper, an experimental study for calculation the heat quantity through a flat wall by electronic system has been presented. The aim is temperature measurement on outer and inner walls of a room for 20 days at 1-minute interval of measurement. A transient regime has been considered. The data measured has been collected on a non-insulated south wall of a Technical University of Varna campus building. The wall layers parameters have to be known for the choice of surrounding area. In order to reduce errors of the outer side of wall temperature measurement caused by the solar radiation, the

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Moukalled, F., and S. Acharya. "Forced Convection Heat Transfer in a Finitely Conducting Externally Finned Pipe." Journal of Heat Transfer 110, no. 3 (1988): 571–76. http://dx.doi.org/10.1115/1.3250530.

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A numerical study to determine the influence of axial wall conduction on forced convection heat transfer in an externally finned pipe has been made. The effects of wall conductivity, interfin spacing, and external heat transfer coefficient are examined by comparing the results with the corresponding solutions obtained assuming negligible wall conduction. Results indicate that the axial conduction in the pipe walls has a significant influence on the heat transfer behavior. The bulk temperature or the heat transferred to the fluid is underestimated when wall conduction is ignored. At high wall c

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Tofighi, A. "Domain Wall Splitting in Extra Dimension." ISRN High Energy Physics 2012 (October 15, 2012): 1–11. http://dx.doi.org/10.5402/2012/505708.

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We study the splitting of domain walls in 5-dimensional flat Minkowski spacetime. To construct a domain wall structure we utilize a potential of the form and for simplicity we assume the scalar field to be real. We also assume the coefficient a to be temperature-dependent. We find exact analytical expressions for the energy density of the domain wall and from this expression we find close analytical form for the separation of the divided domain walls. We find that near critical temperature the domain walls split. At the critical temperature, the domain walls rejoin. In the region above this cr

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Barashkov, Ilya, and Nikita Kravchenko. "DETERMINATION OF THE TEMPERATURE OF THE HEAT CARRIER IN METAL AND PLASTIC PIPES BY THE TEMPERATURE OF THEIR OUTER SURFACE." Energy Systems 8, no. 4 (2024): 147–55. http://dx.doi.org/10.34031/es.2023.4.010.

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To determine the coolant temperature by the pipe wall temperature, mutual dependences between the temperatures of the wall, coolant and air, flow velocity, and pipe dimensions are revealed. It is established that the flow velocity of the coolant in the pipeline affects the heat flux density only in the laminar flow regime characterized by low velocity. A linear dependence between the wall temperature, air temperature and coolant temperature has been found. A nomogram allowing to determine the coolant temperature in polypropylene pipes by their wall temperature has been constructed. It is shown

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Kim, D. M., and R. Viskanta. "Effect of Wall Heat Conduction on Natural Convection Heat Transfer in a Square Enclosure." Journal of Heat Transfer 107, no. 1 (1985): 139–46. http://dx.doi.org/10.1115/1.3247370.

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This paper presents numerical and experimental results for buoyancy-induced flow in a two-dimensional, fluid-filled enclosure. Rectangular cavities formed by finite conductance walls of different void fractions and aspect ratios are considered. Parametric heat transfer calculations have been performed and results are presented and discussed. Local and average Nusselt numbers along the cavity walls are reported for a range of parameters of physical interest. The temperatures in the walls were measured with thermocouples, and the temperature distributions in the air-filled cavity were determined

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Han, Qunzhu, Haoyu Dong, Yingbo Zhang, Taotao Gao, Ge Song, and Shanwang Wang. "Effect of Interlayer Bonding Temperature on the Bending Properties of Asphalt Concrete Core Wall." Materials 16, no. 11 (2023): 4133. http://dx.doi.org/10.3390/ma16114133.

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In the construction process of an asphalt concrete impermeable core wall, the interlayer bonding of the core wall is the weak link of the core wall structure and also the focus of construction, so it is important to carry out research on the influence of interlayer bonding temperature on the bending performance of an asphalt concrete core wall. In this paper, we study whether asphalt concrete core walls could be treated with cold-bonding by fabricating small beam bending specimens with different interlayer bond temperatures and conducting bending tests on them at 2 °C. The effect of temperatur

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Xu, Hui, Lan Jie Zhao, Guo Hong Tong, Yi Qing Cui, and Tian Lai Li. "Microclimate Variations with Wall Configurations for Chinese Solar Greenhouses." Applied Mechanics and Materials 291-294 (February 2013): 931–37. http://dx.doi.org/10.4028/www.scientific.net/amm.291-294.931.

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Five greenhouses with different typical wall configurations were studied, including the hollow brick wall (HB), clay brick wall composed of mural column (MCCB), wall composed of fly ash air block brick (FAABB), clay brick wall composed of plum small hole column (PSHCCB), common clay brick wall with Styrofoam wall outside (SCB) to find out the effects of the north walls on the greenhouse microclimate. The interior temperature and RH environment, as well as the heating rate, cooling rate and the correlation with the outside temperature, were tested and compared, finding that the greenhouse with

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Muchlis Alahudin, Anton Topan, Yosi Valentina Simorangkir, and Henry Soleman Raubaba. "Heat Absorption On Walls With Red Brick Material." Technium: Romanian Journal of Applied Sciences and Technology 16 (October 29, 2023): 475–80. http://dx.doi.org/10.47577/technium.v16i.10033.

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Merauke is one of the cities in the tropics, has a relatively high temperature. Currently, development in Merauke is quite rapid, so the need for materials, especially wall materials, is much needed. The material that is quite familiar for walls is red stone, however, in the last 2 years in Merauke, a new material for walls has been light stone. In this study, the material of the red stone wall is the main variable, the material is selected and measured to have the ability to absorb heat and emit heat. The methods used in this study were: making a wall prototype (test wall) with red stone mate

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Wille, Lukas Anselm, Björn Schiricke, Kai Gehrke, and Bernhard Hoffschmidt. "Reduction of Heating Energy Demand by Combining Infrared Heaters and Infrared Reflective Walls." Buildings 14, no. 7 (2024): 2183. http://dx.doi.org/10.3390/buildings14072183.

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We study the potential of infrared (IR) heaters in combination with IR reflective walls to reduce heating energy demand in buildings. Using IR heaters increases radiant temperature. Combined with IR reflective walls, less radiant heat is absorbed by the surrounding walls, and more is reflected to and absorbed by the occupants. This allows for lower air temperatures while maintaining constant thermal comfort. Lower air temperatures result in heating energy savings. In simulations, we examine the impact of four parameters on the thermal comfort indicator Predicted Mean Vote (PMV): wall temperatu

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Guan, Yong, Yan Chen, Lu Zhou, Zhixiong Wei, Wanling Hu, and Yuchao Yang. "The Thermal Properties of an Active–Passive Heat Storage Wall System Incorporating Phase Change Materials in a Chinese Solar Greenhouse." Sustainability 16, no. 7 (2024): 2624. http://dx.doi.org/10.3390/su16072624.

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The use of renewable energy for food and vegetable production is a potential sustainable method to reduce fossil energy consumption. Chinese solar greenhouses (CSGs) are horticultural facility buildings in the northern hemisphere that use solar energy to produce off-season vegetables in winter. The north wall heat storage and release capacity of CSG has a significant impact on the indoor thermal–humidity environment. However, common traditional solar greenhouses commonly have problems such as insufficient heat storage and release, thick temperature stability zones inside the walls, and inabili

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Chong, Peian, Xiaolei Zhu, Jianning Li, Xiao Li, and Lei Deng. "Investigation on Hydrodynamic Performance and Wall Temperature of Water-Cooled Wall in 1000 MW Boiler Under Low-Load Conditions." Energies 17, no. 22 (2024): 5751. http://dx.doi.org/10.3390/en17225751.

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To enhance the peak-shaving capability of a boiler, a mathematical model of hydrodynamic and wall temperature characteristics for the water-cooled wall of a 1000 MW boiler was established. Utilizing the component pressure method, the mass flow distribution, outlet working fluid temperature, pressure loss, and wall temperature distribution characteristics of the water-cooled walls at 30% of the boiler’s maximum continuous rating (BMCR) were calculated and analyzed. The findings suggest that, under the operation at 30% BMCR load, there is a substantial equilibrium in the flow distribution across

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Ma, Tian Fei, Hong Xia Li, Xin Fu Wang, and Guo Qi Liu. "Numerical Calculation for Temperature Field in Two Exits Tundish." Applied Mechanics and Materials 723 (January 2015): 983–87. http://dx.doi.org/10.4028/www.scientific.net/amm.723.983.

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According to the operating parameters of a tundish for continuous casting in a steel mill, the temperature distribution of molten steel in tundish was studied by the method of numerical calculation. Change the flow orifice area of slag wall, simulation calculation for the effect of various slag walls on the temperature distribution of molten steel in tundish was done. Through the calculation and analysis of tundish longitudinal section and the surface temperature distribution, temperature uniformity of molten steel in tundish was determined. The calculation results show that: the slag wall can

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Ingenito, E. P., J. Solway, E. R. McFadden, et al. "Indirect assessment of mucosal surface temperatures in the airways: theory and tests." Journal of Applied Physiology 63, no. 5 (1987): 2075–83. http://dx.doi.org/10.1152/jappl.1987.63.5.2075.

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We developed and tested a method, based on conduction heat transfer analysis, to infer airway mucosal temperatures from airstream temperature-time profiles during breath-hold maneuvers. The method assumes that radial conduction of heat from the mucosal wall to inspired air dominates heat exchange during a breath-hold maneuver and uses a simplified conservation of energy analysis to extrapolate wall temperatures from air temperature vs. time profiles. Validation studies were performed by simultaneously measuring air and wall temperatures by use of a retractable basket probe in the upper airways

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Kavgic, Miroslava, and Yaser Abdellatef. "Temperature Control to Improve Performance of Hempcrete-Phase Change Material Wall Assemblies in a Cold Climate." Energies 14, no. 17 (2021): 5343. http://dx.doi.org/10.3390/en14175343.

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Phase change material (PCM)-enhanced building envelopes can control indoor temperatures and save energy. However, PCM needs to undergo a phase change transition from solid to liquid and back to be fully effective. Furthermore, most previous research integrated PCM with high embodied energy materials. This study aims to advance the existing research on integrating PCM into carbon-negative wall assemblies composed of hempcrete and applying temperature control strategies to improve wall systems’ performance while considering the hysteresis phenomenon. Four hempcrete and hempcrete-PCM (HPCM) wall

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JK, Mariya Helen Mercy, and Prabhakar V. "Study of fluid flow inside closed cavities using computational numerical methods." International Journal for Simulation and Multidisciplinary Design Optimization 12 (2021): 4. http://dx.doi.org/10.1051/smdo/2021003.

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The temperature distribution and distortion of fluid flow inside the closed cavities, square and triangle, are studied for different boundary conditions. Two different conditions of thermal boundary conditions are used for studying square cavities: (i) Left wall is hot, right wall is cold, top and bottom walls are adiabatic. (ii) Left and right walls are cold, top wall is adiabatic, bottom wall is hot. For triangular enclosure, the boundary conditions are (i) the vertical wall is insulated, bottom wall is hot. (ii) The vertical wall is hot, the bottom wall insulated and the inclined walls are

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Tai, C. C., P. Y. Tzeng, and C. Y. Soong. "DSMC Study of Pressure-Driven Slip Flow through Microchannel at Non-Uniform Wall Temperature." Journal of Mechanics 31, no. 3 (2015): 279–89. http://dx.doi.org/10.1017/jmech.2014.84.

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ABSTRACTThe present study is to investigate the pressure-driven gas flow in microchannel at no-uniform wall temperature. DSMC is employed to generate the flow field details which are then used in analysis of the slip flow characteristics. The major concern is the influences of thermal creep effect on the pressure-driven slip flow. Thermal creep is resulted from tangential wall temperature gradient. In this work, two kinds of thermal boundary condition are considered. One is the linearly varied temperature (LVT) applied to both walls, the other is that has the bottom wall at a thermal condition

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Widyan, H. "Finite-temperature phase transition in ϕ6 potential". Canadian Journal of Physics 86, № 11 (2008): 1313–19. http://dx.doi.org/10.1139/p08-080.

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The temperature dependance of the action in thin-wall and thick-wall limits is obtained analytically for the ϕ6 scalar potential. The nature of the phase transition is investigated from the quantum tunnelling regime at low temperatures to the thermal hopping regime at high temperatures. It is first-order for the case of a thin wall while for the thick wall it is second- order. PACS Nos.: 10.10.Wx, 05.70.Fh, 10.10.Ef

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Bezon, E., J. A. Barra, P. Mondine, and A. Karaterki. "Retrograde Cold Blood Cardioplegia. Obliteration of the Posterior Interventricular Vein in the Coronary Sinus Improves Cooling of the Left Ventricle Posterior Wall." Cardiovascular Surgery 5, no. 6 (1997): 620–25. http://dx.doi.org/10.1177/096721099700500612.

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The study hypothesis was that obliteration of the posterior interventricular vein in the coronary sinus avoids the back leak of cardioplegia to the right atrium and forces cardioplegia towards the posterior wall of the left ventricle and interventricular septum. A new retrograde cardioplegia cannula with a long balloon (3 cm) was designed which obstructs the posterior interventricular vein in the coronary sinus. The hypothesis was tested by a prospective randomized study in 52 consecutive patients who underwent coronary or aortic valve surgery. In group I ( n = 26), the cannula prototype was u

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Chen, K. S., J. R. Ho, and J. A. C. Humphrey. "Steady, Two-Dimensional, Natural Convection in Rectangular Enclosures With Differently Heated Walls." Journal of Heat Transfer 109, no. 2 (1987): 400–406. http://dx.doi.org/10.1115/1.3248094.

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Numerical results are presented for steady natural convection in two-dimensional rectangular enclosures in which the side walls, top wall, and bottom wall are at uniform temperatures θs, θt, and θb, respectively, and θs > θt > θb. Raylight numbers ranging from 104 to 107 and aspect ratios of 1 and 1.5 were investigated. The top wall was modeled as an impermeable rigid surface or an impermeable free-moving boundary. The calculations reveal two flow regions. In the upper part of the enclosure two large counterrotating cells appear, separated by a descending plume of fluid. Near the bottom

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Issakhov, Alibek, and Yeldos Zhandaulet. "Investigation of Geometry Effect on Heat and Mass Transfer in Buoyancy Assisting with the Vertical Backward and Forward Facing Steps." International Journal of Nonlinear Sciences and Numerical Simulation 20, no. 3-4 (2019): 407–31. http://dx.doi.org/10.1515/ijnsns-2018-0202.

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AbstractThis paper is a Direct Numerical Simulation (DNS) of the temperature distribution in the flow with the forward and backward facing steps with buoyancy forces for different lengths of the bottom walls and flow regimes. The different lengths of the bottom walls effect were studied with buoyancy forces. A two-dimensional incompressible Navier–Stokes equation and equations for temperature transfer were used to describe this process. The obtained numerical solutions for the test problem, laminar flow with the backward facing step with buoyancy force, are compared with the numerical results

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Sun, Pan Pan, Shu Zhong Wang, Yan Hui Li, and Xue Dong Li. "Numerical Analysis on Heat Transfer and Oxidation Characteristics of High-Temperature Steam Pipes in Supercritical Units." Advanced Materials Research 908 (March 2014): 81–84. http://dx.doi.org/10.4028/www.scientific.net/amr.908.81.

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In this paper, for Super304H steel, the growth law of oxide films and the heat transfer characteristics between the pipe and the working fluid were investigated by using numerical software ANSYS, which simulated comprehensively the effects of pipe size, flow rates of steam, flue gas temperature, and steam temperature on the formation and thickness of the oxide film. A bigger pipe wall thickness, a smaller steam flow rate or a higher flue gas temperature will lead the faster growth of the oxide film thickness, the heat flux density through the wall being smaller and the wall temperature being h

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