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Journal articles on the topic 'Equivalent temperature gradient'

Author: Grafiati

Published: 28 June 2021

Last updated: 29 July 2025

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1

Li, Zhaoyi, Wei Liang, and Yufeng Liu. "Equivalent Modulus and Mass Loss of C/C-SiC Gradient Matrix Composites at High Temperature." Journal of Physics: Conference Series 2219, no. 1 (2022): 012010. http://dx.doi.org/10.1088/1742-6596/2219/1/012010.

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Abstract The oxidation at high temperature of carbon fiber reinforced carbon-silicon carbide (C/C-SiC) gradient matrix composites results in structural damages and performance degradation. Oxidation kinetics model of C/C-SiC gradient matrix composites was built. A representative volume element (RVE) was established according to the microstructure of the composites. The evolution law of the structure characterization of the composites and the mass loss model were derived from the oxidation kinetics model. And equivalent elastic modulus with oxidation time at different temperatures and coefficie

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2

Baumann, Hannes, and David O. Conover. "Adaptation to climate change: contrasting patterns of thermal-reaction-norm evolution in Pacific versus Atlantic silversides." Proceedings of the Royal Society B: Biological Sciences 278, no. 1716 (2011): 2265–73. http://dx.doi.org/10.1098/rspb.2010.2479.

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How organisms may adapt to rising global temperatures is uncertain, but concepts can emerge from studying adaptive physiological trait variations across existing spatial climate gradients. Many ectotherms, particularly fish, have evolved increasing genetic growth capacities with latitude (i.e. countergradient variation (CnGV) in growth), which are thought to be an adaptation primarily to strong gradients in seasonality. In contrast, evolutionary responses to gradients in mean temperature are often assumed to involve an alternative mode, ‘thermal adaptation’. We measured thermal growth reaction

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3

Thomas, Carl M., and David M. Schultz. "What are the Best Thermodynamic Quantity and Function to Define a Front in Gridded Model Output?" Bulletin of the American Meteorological Society 100, no. 5 (2019): 873–95. http://dx.doi.org/10.1175/bams-d-18-0137.1.

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AbstractFronts can be computed from gridded datasets such as numerical model output and reanalyses, resulting in automated surface frontal charts and climatologies. Defining automated fronts requires quantities (e.g., potential temperature, equivalent potential temperature, wind shifts) and kinematic functions (e.g., gradient, thermal front parameter, and frontogenesis). Which are the most appropriate to use in different applications remains an open question. This question is investigated using two quantities (potential temperature and equivalent potential temperature) and three functions (mag

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Huang, Zi Qian, and Qing Lian Xie. "Study on Thermal Stresses of Cylinder Liner’s Fabrication Using FEM Analysis." Advanced Materials Research 189-193 (February 2011): 2058–61. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.2058.

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In the process of casing casting, great temperature gradient leads to contraction deformation of cylinder liner, which influences the quality of products. The thermal stresses caused by temperature gradient were analyzed by finite element method. The numerical results show that high equivalent Von Mises stress(242MPa) occurs in the surface zone of the cylinder liner as Cooling down to room temperature within pipe die ,also there is plastic deformation in the internal and external surface zone. Reducing the cooling speed, decreasing the temperature gradient and aging can reduce the influence of

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Li, Boyu, Fei Lei, and Zibo Shen. "A Comprehensive Simplified Algorithm for Heat Transfer Modeling of Medium-Deep Borehole Heat Exchangers Considering Soil Stratification and Geothermal Gradient." Energies 18, no. 14 (2025): 3716. https://doi.org/10.3390/en18143716.

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Medium-deep borehole heat exchanger (BHE) systems represent an emerging form of ground source heat pump technology. Their heat transfer process is significantly influenced by geothermal gradient and soil stratification, typically simulated using segmented finite line source (SFLS) models. However, this approach involves computationally intensive procedures that hinder practical engineering implementation. Building upon an SFLS model adapted for complex geological conditions, this study proposes a comprehensive simplified algorithm: (1) For soil stratification: A geothermally-weighted thermal c

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6

Mohamed, Ashraf R., and Will Hansen. "Effect of Nonlinear Temperature Gradient on Curling Stress in Concrete Pavements." Transportation Research Record: Journal of the Transportation Research Board 1568, no. 1 (1997): 65–71. http://dx.doi.org/10.3141/1568-08.

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Temperature and moisture gradients can lead to significant tensile stresses at the slab top and bottom. Current techniques for assessing the internal stresses due to such gradients are based on the assumption that temperature and moisture distributions through the slab thickness are linear. However, the actual distributions of such gradients have been found to be highly nonlinear. A new closed form solution technique for calculating the stresses in a pavement slab due to nonlinear gradients is introduced. The analysis is separated into two parts. In the first, an expression is presented for ca

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Suresha, Kasala. "Amplification and Attenuation of Acoustic Phonons in Graphenelike Silicene." International Journal for Research in Applied Science and Engineering Technology 9, no. 12 (2021): 1594–97. http://dx.doi.org/10.22214/ijraset.2021.39562.

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Abstract: Because of unique physical properties, graphene, a 2D honeycomb arrangement of carbon atoms, has attracted tremendous attention. Silicene, the graphene equivalent for silicon, could follow this trend, opening new perspectives for applications, especially due to its compatibility with Si-based electronics. Silicene has been theoretically predicted as a buckled honeycomb arrangement of Si atoms and having an electronic dispersion resembling that of relativistic Dirac fermions. We calculate theoretically in this article, the amplification and attenuation of acoustic phonons due to an ex

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8

Billon, Noelle, Jean Marc Haudin, Camille Vallot, and Charles Babin. "Stretch Blow Moulding of Mineral Filled PET." Key Engineering Materials 504-506 (February 2012): 1099–104. http://dx.doi.org/10.4028/www.scientific.net/kem.504-506.1099.

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Injection Stretch Blow mouldng is a two step processing that was designed and optimized mainly using unfilled PET resins. This study focuses on stretch blow moulding of a PET filled with a few percent of sub micronic mineral fillers. Based on DSC, DMA, tensile tests as well as blowing on prototype machine main effects of fillers are analysed. It is demonstrated that fillers increases crystallization kinetics resulting in a reduction of the processing range. Difference in strain hardening induced by fillers makes it necessary to adjust blowing temperature. However main effect occurs during heat

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9

Miaskowski, Arkadiusz, and Piotr Gas. "Numerical Estimation of SAR and Temperature Distributions inside Differently Shaped Female Breast Tumors during Radio-Frequency Ablation." Materials 16, no. 1 (2022): 223. http://dx.doi.org/10.3390/ma16010223.

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Radio-frequency (RF) ablation is a reliable technique for the treatment of deep-seated malignant tumors, including breast carcinoma, using high ablative temperatures. The paper aims at a comparative analysis of the specific absorption rate and temperature distribution during RF ablation with regard to different female breast tumors. In the study, four tumor models equivalent to an irregular tumor were considered, i.e., an equivalent sphere and ellipsoid with the same surfaces and volumes as the irregular tumor and an equivalent sphere and ellipsoid inscribed in the irregular tumor. An RF appli

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10

Riley, Jeffrey B., Scott B. Hardin, Brad A. Winn, and Michael B. Hurdle. "In vitro comparison of cavoatrial (dual stage) cannulae for use during cardiopulmonary bypass." Perfusion 1, no. 3 (1986): 197–204. http://dx.doi.org/10.1177/026765918600100308.

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An in vitro normothermic, human blood test circuit was constructed to test four cavoatrial (dual stage) cannulae, their right atrial baskets and IVC tips for venous return flow versus siphon drainage gradient. Simulated patient CVP and ECC oxygenator/venous reservoir inlet resistance were held constant at 10 mmHg and 15 mmHg respectively as siphon gradient was varied from 0 centimetres (cm) to -40 cm of blood. At the same siphon gradients between -10 and -40 cm, the Research Medical, Inc. (RMI) VV 3651 L, its right atrial (RA) basket, and IVC tip yielded significantly greater flows than the Sa

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11

Yu, Peng, Ruiqing Li, Dapeng Bie, Xiancai Liu, Xiaomin Yao, and Yahui Duan. "Precise Simulation of Heat-Flow Coupling of Pipe Cooling in Mass Concrete." Materials 14, no. 18 (2021): 5142. http://dx.doi.org/10.3390/ma14185142.

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For a long time, temperature control and crack prevention of mass concrete is a difficult job in engineering. For temperature control and crack prevention, the most effective and common-used method is to embed cooling pipe in mass concrete. At present, there still exists some challenges in the precise simulation of pipe cooling in mass concrete, which is a complex heat-flow coupling problem. Numerical simulation is faced with the problem of over-simplification and inaccuracy. In this study, precise simulation of heat-flow coupling of pipe cooling in mass concrete is carried out based on finite

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12

Lee, Jon. "Large-Amplitude Plate Vibration in an Elevated Thermal Environment." Applied Mechanics Reviews 46, no. 11S (1993): S242—S254. http://dx.doi.org/10.1115/1.3122643.

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At elevated temperatures the dynamics of vibrating plate (or shell) must include the three thermal effects: (i) the global expansion by uniform plate temperature, (ii) the local expansion by temperature variation over the plate, and (iii) the thermal moment induced by temperature gradient across the plate thickness. For the single-mode prototype model of Galerkin representation, (i) and (ii) give rise to the combined stiffness that is responsible for thermal buckling, whereas (iii) contributes to the combined forcing of acoustic and thermal excitations. For the high-temperature sonic fatigue t

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13

Luo, Zuolong, Yuan Li, Jiaqing Wang, and Fenghui Dong. "Refined Analysis of the Transient Temperature Effect during the Closing Process of a Cross-Sea Bridge." Sustainability 15, no. 17 (2023): 12970. http://dx.doi.org/10.3390/su151712970.

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In order to study the transient temperature effect during the construction of a cross-sea bridge off the coast, based on the Hong Kong-Zhuhai-Macao Bridge-Pipe Bridge Crossing Cliff 13-1 Gas Field, a refined analysis was conducted and the prediction of transient temperature gradient and structural response was carried out under the conditions of strong solar radiation and atmospheric convection using the method of combining theoretical research and numerical simulation. Firstly, the partial differential equation of uniform heat flux density on the outer surface of the main girder under the act

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14

Gao, Xiang, Ya Wei, and Wei Huang. "Strain-based equivalent temperature gradient in concrete pavement and comparison with other quantification methods." Road Materials and Pavement Design 18, no. 6 (2016): 1460–72. http://dx.doi.org/10.1080/14680629.2016.1218788.

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15

Liu, Wen, Hongcan Gu, Su Zhang, et al. "Equivalent Phase Shift Induced by Longitudinal Temperature Distribution in Pumped DFB Fiber Laser." Photonics 12, no. 2 (2025): 101. https://doi.org/10.3390/photonics12020101.

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The pump heating effect of DFB fiber laser is normally ignored due to the short length of the laser cavity. However, by fabricating a phase-shifted FBG on high concentration Er-Yb codoped fiber to obtain a 16 mm long DFB fiber laser, the gradient surface temperature distributions along the active grating with different pump powers were observed. The average surface temperature rose by 16.82 K with a variation of less than 1.11 K, and the position with the highest temperature moved towards the center of the grating by 5.5 mm, when the pump power was increased from 0 mW to 191.6 mW. The transmis

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16

Xu, Jinkang, and Xiaolong Zhou. "The Influence of Geometrical Parameters on Temperature Deformation of Spherical Honeycomb Sandwich Structure." Journal of Physics: Conference Series 2578, no. 1 (2023): 012008. http://dx.doi.org/10.1088/1742-6596/2578/1/012008.

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Abstract As a reflector of the high-precision measurement system, the reflecting surface RMS has a significant impact on the accuracy of the entire system. Currently, studies on honeycomb sandwich structures mainly focus on optimization with lightweight as the goal and stiffness and strength as constraints. And studies on temperature deformation are limited. Consulting the honeycomb sandwich equivalent theory, this paper has studied the influence of geometric parameters of honeycomb sandwich structure on the reflecting RMS in different temperature fields. In global temperature fields, the refl

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17

Jiang, Lian-Yun, Heng Li, Yao-Yu Wei, Zhen-Lei Li, and Zhi-Quan Huang. "The central deformation calculation and analysis of the heavy steel plate for the gradient temperature rolling." Metallurgical Research & Technology 119, no. 2 (2022): 201. http://dx.doi.org/10.1051/metal/2022006.

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The traditional symmetrical rolling process may result in the insufficient central deformation of the heavy steel plate. The gradient temperature rolling (GTR) based on the ultra-fast cooling was adopted in order to improve the central deformation and keep the deformation along the thickness to be well distributed. The temperature and strain field of the gradient temperature rolling were obtained by the thermo-mechanical coupling finite element method combined with different surface heat transfer coefficient, plate thickness, work roll diameters and so on. The calculated results showed that th

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18

Skinner, Patrick S., Christopher C. Weiss, John L. Schroeder, Louis J. Wicker, and Michael I. Biggerstaff. "Observations of the Surface Boundary Structure within the 23 May 2007 Perryton, Texas, Supercell." Monthly Weather Review 139, no. 12 (2011): 3730–49. http://dx.doi.org/10.1175/mwr-d-10-05078.1.

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Abstract In situ data collected within a weakly tornadic, high-precipitation supercell occurring on 23 May 2007 near Perryton, Texas, are presented. Data were collected using a recently developed fleet of 22 durable, rapidly deployable probes dubbed “StickNet” as well as four mobile mesonet probes. Kinematic and thermodynamic observations of boundaries within the supercell are described in tandem with an analysis of data from the Shared Mobile Atmospheric Research and Teaching Radar. Observations within the rear-flank downdraft of the storm exhibit large deficits of both virtual potential temp

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19

Sneddon, Jennifer C. "The effect of treadmill slope on the relationship between heart rate and energy expenditure in cattle walking on treadmills." Journal of Agricultural Science 106, no. 3 (1986): 433–36. http://dx.doi.org/10.1017/s0021859600063292.

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SummaryTwo steers (Bos indicus and Bos indicus x Bos taurus) were acclimatized to an ambient temperature of 30 °C before working at this temperature on two treadmills (gradients 0 and 6°) for 2 h (one on each treadmill) whilst carrying a load equivalent to 10% of body weight. The study was then repeated at an ambient temperature of 15 °C. The effect of variation between animals, ambient temperature and rate of energy expenditure were tested on the linear regression model EEw = A PHR + B (where EEw is the energy expenditure (w/kg0·75) and PHR is the percentage increase of working heart rate ove

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20

Nie, Huacheng, Yuexia Lv, Tingting Du, and Xinyu Song. "Flow Characteristics and Switching Mechanism of Bistable Slit Flow Actuated by Temperature." Entropy 25, no. 4 (2023): 650. http://dx.doi.org/10.3390/e25040650.

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The bistable flow is attractive as it can be analogous to a switch to realize flow control. Based on the previous studies on actuation technique, the present study first proposed temperature-driven switching of bistable slit flow. A two-dimensional numerical simulation was conducted to investigate the flow deflection characteristics and switching mechanism. It was concluded that the temperature gradient not only biases the slit flow but also locks it to the high-temperature side. The flow deflection angle became larger with the increase in temperature gradient. Being driven by the temperature,

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21

Shi, Wei, Wei Li, and Shusheng Xiong. "Internal Temperature Estimation for Lithium-Ion Cells Based on a Layered Electro-Thermal Equivalent Circuit Model." Batteries 10, no. 11 (2024): 406. http://dx.doi.org/10.3390/batteries10110406.

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In the domain of Battery Management System (BMS) research, the precise acquisition and estimation of internal temperature distribution within lithium-ion cells is a significant challenge. The commercial viability precludes the use of internal temperature sensors, and existing methodologies for online estimation of internal temperatures under various electrical loads are constrained by computational limitations and model accuracy. This study presents a layered electro-thermal equivalent circuit model (LETECM), developed by integrating a layered second-order fractional equivalent circuit model w

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22

Domine, F., S. Morin, E. Brun, and M. Lafaysse. "Seasonal evolution of snow permeability under equi-temperature and temperature-gradient conditions." Cryosphere Discussions 7, no. 3 (2013): 2725–59. http://dx.doi.org/10.5194/tcd-7-2725-2013.

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Abstract. The permeability K of snow to air flow affects the transfer of energy, water vapor and chemical species between the snow and the atmosphere. Yet today little is known of the temporal evolution of snow permeability as a function of metamorphic regime. Furthermore, our ability to simulate snow permeability over the seasonal evolution of a snowpack has not been tested. Here we have measured the evolution of snow permeability in a subarctic snowpack subject to high temperature-gradient (TG) metamorphism. We have also measured the evolution of the same snowpack deposited over tables so th

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23

Domine, F., S. Morin, E. Brun, M. Lafaysse, and C. M. Carmagnola. "Seasonal evolution of snow permeability under equi-temperature and temperature-gradient conditions." Cryosphere 7, no. 6 (2013): 1915–29. http://dx.doi.org/10.5194/tc-7-1915-2013.

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Abstract. The permeability (K) of snow to air flow affects the transfer of energy, water vapor and chemical species between the snow and the atmosphere. Yet today little is known about the temporal evolution of snow permeability as a function of metamorphic regime. Furthermore, our ability to simulate snow permeability over the seasonal evolution of a snowpack has not been tested. Here we have measured the evolution of snow permeability in a subarctic snowpack subject to high temperature-gradient (TG) metamorphism. We have also measured the evolution of the same snowpack deposited over tables

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24

Ozhmegov, Kirill, Anna Kawalek, Abdrakhman Naizabekov, et al. "The Effect of Radial-Shear Rolling Deformation Processing on the Structure and Properties of Zr-2.5Nb Alloy." Materials 16, no. 10 (2023): 3873. http://dx.doi.org/10.3390/ma16103873.

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The rheological properties of the Zr-2.5Nb alloy by the strain rate range of 0.5–15 s−1 and by the temperature range of 20–770 °C was studied. The dilatometric method for phase states temperature ranges was experimentally determined. A material properties database for computer FEM simulation regards the indicated temperature-velocity ranges were created. Using this database and DEFORM-3D FEM-softpack, the radial shear rolling complex process numerical simulation was carried out. The contributed conditions for the ultrafine-grained state alloy structure refinement were determined. Based on the

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Shu, Xuedao, Zewei Cen, Yu Wang, Zixuan Li, and Ying Zhu. "Exploring Strong Spinning Formation Mechanisms of GH3030 Superalloy Tapered Rotary Part with Wall Thickness Gradient." Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University 37, no. 4 (2019): 785–93. http://dx.doi.org/10.1051/jnwpu/20193740785.

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In order to effectively control the deformation of tapered spinning parts with gradually changing wall thickness, the precise forming of such sheet metal casing parts can be realized. This paper uses experiments to establish the true stress-strain curve equations of GH3030 superalloy at normal temperature. Based on the equations, it establishes the finite element model of the strong spinning forming of a GH3030 superalloy tapered rotary part with wall thickness gradient. The equivalent stress field for the strong spinning forming is used to combine the finite element simulation with experiment

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Liang, Peixin, Yulong Pei, Feng Chai, and Shukang Cheng. "Equivalent stator slot model of temperature field for high torque-density permanent magnet synchronous in-wheel motors accounting for winding type." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 35, no. 2 (2016): 713–27. http://dx.doi.org/10.1108/compel-02-2015-0040.

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Purpose – For high torque-density permanent magnet synchronous in-wheel motor, service life and electromagnetic performance are related directly to winding temperature. The purpose of this paper is to investigate the equivalent stator slot model to calculate the temperature of winding accurately. Design/methodology/approach – This paper analyzes the the law of heat flux transfer in slot, which points the main influence factors of equivalent stator slot model. Thermal network model is used to investigate the drawbacks of conventional equivalent model. Based on the law of heat transfer in stator

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27

Fischer, H., D. Wagenbach, M. Laternser, and W. Haeberli. "Glacio-meteorological and isotopic studies along the EGIG line, central Greenland." Journal of Glaciology 41, no. 139 (1995): 515–27. http://dx.doi.org/10.1017/s0022143000034857.

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AbstractThe geographical distribution of firn temperature, annual accumulation rate as well as deuterium and oxygen-18 content in the firn were determined along an east-west transect through central Greenland. This study is based on isotopic and chemical analyses of shallow firn cores at 18 sites along the EGIG line and high-precision firn-temperature measurements m 17 steam-drilled boreholes along the eastern part of the transect. The firn temperatures at 15 m depth range from -31.6°C at Dome GRIP (3230 m a.s.l.) to -11.4°C at Caecilia Nunatak (eastern ice margin at 1600 m a.sl.) and -18°C at

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Fischer, H., D. Wagenbach, M. Laternser, and W. Haeberli. "Glacio-meteorological and isotopic studies along the EGIG line, central Greenland." Journal of Glaciology 41, no. 139 (1995): 515–27. http://dx.doi.org/10.3189/s0022143000034857.

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AbstractThe geographical distribution of firn temperature, annual accumulation rate as well as deuterium and oxygen-18 content in the firn were determined along an east-west transect through central Greenland. This study is based on isotopic and chemical analyses of shallow firn cores at 18 sites along the EGIG line and high-precision firn-temperature measurements m 17 steam-drilled boreholes along the eastern part of the transect. The firn temperatures at 15 m depth range from -31.6°C at Dome GRIP (3230 m a.s.l.) to -11.4°C at Caecilia Nunatak (eastern ice margin at 1600 m a.sl.) and -18°C at

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29

Tang, Siwen, Rui Wang, Pengfei Liu, et al. "Preparation of WC-TiC-Ni3Al-CaF2 functionally graded self-lubricating tool material by microwave sintering and its cutting performance." High Temperature Materials and Processes 39, no. 1 (2020): 45–53. http://dx.doi.org/10.1515/htmp-2020-0004.

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AbstractWith the concern of the environment, green dry cutting technology is getting more and more attention and self-lubricating tool technology plays an important role in dry cutting. Due to the demand for high temperature performance of tools during dry cutting process, cemented carbide with Ni3Al as the binder phase has received extensive attention due to its excellent high temperature strength and high temperature oxidation resistance. In this paper, WC-TiC-Ni3Al-CaF2 graded self-lubricating material and tools were prepared by microwave heating method, and its microstructure, mechanical p

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Ni, Feng, Shi Zhong Wei, and Rui Long. "Analytical Solution on the Relation of Technique Parameters for Continuous Casting with Heated Mould." Advanced Materials Research 337 (September 2011): 225–31. http://dx.doi.org/10.4028/www.scientific.net/amr.337.225.

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The technique of continuous casting with heated mould is a kind of near-net-shape processing technology, which combines unidirectional solidification with continuous casting and has been used widely for new material development and processing. A steady-state heat-transfer model was suggested for pure metal case. Some of modeling parameters, such as equivalent specific conductance and equivalent heat-transfer coefficient, etc, had been defined. The analytic solution of temperature profile along the axis of casting rod was obtained for solid-liquid interface to be as origin of position coordinat

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Zhang, Hai Yang, Wei Bing Zhu, Gang Zhou, and Xu Hao. "Study on the Thermal Stress Couple Field of Nuclear Power Pump Mechanical Seal Based on ADINA." Advanced Materials Research 971-973 (June 2014): 1160–64. http://dx.doi.org/10.4028/www.scientific.net/amr.971-973.1160.

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In this paper, a two-dimensional axisymmetric thermal stress coupling model of mechanical seal’s rotator and stator components was established by ADINA, simplification and appropriate boundary constrained condition of stator and rotator was obtained by analyzing the contact state among the seal rings. It’s shown that the contact surface is equivalent to a resource of constant thermal, temperature of contact surface rises step by step and the location of the maximum temperature getting close to the midpoint within the contact surface according to the sliding time, the temperature gradient decre

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Chen, Chi, Xia Wang, Zepeng Lv, Kai Wu, and Chuanhui Cheng. "An equivalent investigation of space charge for plane samples and coaxial cables under a temperature gradient." IEEE Transactions on Dielectrics and Electrical Insulation 27, no. 4 (2020): 1256–64. http://dx.doi.org/10.1109/tdei.2020.008676.

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Zhou, Yushu, Liping Liu, and Guo Deng. "Comparisons of the Generalized Potential Temperature in Moist Atmosphere with the Equivalent Potential Temperature in Saturated Moist Atmosphere." Advances in Meteorology 2009 (2009): 1–9. http://dx.doi.org/10.1155/2009/105265.

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The real tropospheric atmosphere is neither absolutely dry nor completely saturated. It is in general moist but not saturated. Here the generalized potential temperature (GPT) was introduced to describe this humid feature of real moist atmosphere. GPT's conservation property in moist adiabatic process was discussed and proved. Comparisons of GPT in moist atmosphere with the equivalent potential temperature (EPT) in saturated moist atmosphere were made by analyzing three torrential rain cases occurring over Jianghuai Valleys in 2003, the north China in 2004, and with the typhoon Fung-Wong in 20

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Rao, Xixin, Huizhong Liu, Sai Wang, Jianhao Song, Cheng Jin, and Chengdi Xiao. "Thermal modeling and analysis of three-dimensional integrated circuits with irregular structure." Thermal Science, no. 00 (2023): 61. http://dx.doi.org/10.2298/tsci220805061r.

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Considering the manufacturing and packaging process, three-dimensional integrated circuits design often requires irregular chip structures. Three-dimensional integrated circuits with irregular structures can facilitate differentiated chip design and reduce manufacturing costs. Highly complex through-silicon vias have not been considered in past thermal modeling and analysis of irregularly structured three-dimensional integrated circuits. Thus, a detailed model of a three-layer irregularly structured 3D integrated circuit with through-silicon vias and microbumps is developed, and an analytical

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Fedyukhin, Alexander V., Konstantin V. Strogonov, Olga V. Soloveva, et al. "Aerogel Product Applications for High-Temperature Thermal Insulation." Energies 15, no. 20 (2022): 7792. http://dx.doi.org/10.3390/en15207792.

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This paper presents the results of theoretical and experimental studies to determine the optimal thickness of thermal insulation from basalt fiber and aerogel products for pipelines at temperatures of 300 and 600 °C. We carried out a comparison of the key thermophysical characteristics of the claimed heat-insulating materials. We performed a thermal imaging survey of the furnace chimney, insulated with basalt fiber and aerogel, while controlling the temperature of the flue gases by establishing the required ratio of the flow rate of natural gas and oxidizer. The temperature gradient along the

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Wang, Chuanli, Shun Wang, Huawei Jin, Huanyu Huo, Huwei Xu, and Zhuqi Chen. "Thermal-mechanical coupling analysis and optimization of mine hoist brake disc." Advances in Mechanical Engineering 14, no. 6 (2022): 168781322211062. http://dx.doi.org/10.1177/16878132221106297.

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Based on heat conduction theory and energy conversion, the theoretical model of brake disc temperature field was established. The temperature field and equivalent Von Mises stress field distribution of brake disc during braking were investigated by using the finite element (FE) analysis. According to the thermal-mechanical coupling analysis, orthogonal optimization and analysis of variance (ANOVA) were used to optimize brake for reducing Von Mises stress on the brake disc. Results show that the temperature of a friction surface is high in the middle and low on both sides, with a large temperat

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Donnelly, Charles A., Sushobhan Sen, John W. DeSantis, and Julie M. Vandenbossche. "Prediction of effective equivalent linear temperature gradients in bonded concrete overlays of asphalt pavements." Engineering Computations 41, no. 2 (2024): 468–85. http://dx.doi.org/10.1108/ec-04-2023-0161.

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PurposeThe time-varying equivalent linear temperature gradient (ELTG) significantly affects the development of faulting and must therefore be accounted for in pavement design. The same is true for faulting of bonded concrete overlays of asphalt (BCOA) with slabs larger than 3 x 3 m. However, the evaluation of ELTG in Mechanistic-Empirical (ME) BCOA design is highly time-consuming. The use of an effective ELTG (EELTG) is an efficient alternative to calculating ELTG. In this study, a model to quickly evaluate EELTG was developed for faulting in BCOA for panels 3 m or longer in size, whose faulti

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Wang, Xi, Jiao Zhong, and Hao Ke. "Effect of Pipe Length on the Temperature Field for 9% Cr Heat-Resistant Steel Pipes in Local Post Weld Heat Treatment." Materials Science Forum 953 (May 2019): 32–38. http://dx.doi.org/10.4028/www.scientific.net/msf.953.32.

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ANSYS was used to establish the calculation model of the temperature field for 9% Cr heat-resistant steel pipes in local post-weld heat treatment (PWHT). And the computation model has been validated experimentally. Based on the numerical model, the temperature field distribution was simulated for different pipe lengths in local PWHT, and effects of pipe length on the temperature distribution of heat treatment was further studied. Results show that increase of pipe length has little influence on equivalent temperature measurement point, soak band (SB) width of outer wall and axial temperature g

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Jaguemont, Joris, Ali Darwiche, and Fanny Bardé. "Optimal Fast-Charging Strategy for Cylindrical Li-Ion Cells at Different Temperatures." World Electric Vehicle Journal 15, no. 8 (2024): 330. http://dx.doi.org/10.3390/wevj15080330.

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Ensuring efficiency and safety is critical when developing charging strategies for lithium-ion batteries. This paper introduces a novel method to optimize fast charging for cylindrical Li-ion NMC 3Ah cells, enhancing both their charging efficiency and thermal safety. Using Model Predictive Control (MPC), this study presents a cost function that estimates the thermal safety boundary of Li-ion batteries, emphasizing the relationship between the temperature gradient and the state of charge (SoC) at different temperatures. The charging control framework combines an equivalent circuit model (ECM) w

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Jiang, Lian-Yun, Tao Zhen, Guo Yuan, et al. "The mechanical parameters modeling of heavy steel plate snake/gradient temperature rolling with the same roll diameters." Metallurgical Research & Technology 117, no. 3 (2020): 301. http://dx.doi.org/10.1051/metal/2020019.

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The grains in the center of the heavy steel plate can be refined by the snake/gradient temperature rolling, and the deformation penetration, the microstructure, and the properties of the steel plate will be improved. The existing rolling mechanical models are not suitable for the snake/gradient temperature rolling, so it is necessary to establish the mechanical parameters model of the snake/gradient temperature rolling to instruct production. The yield criterion of rolled material was modified based on the idea of equivalent flow stress. The element stress analyses were carried out based on th

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Perpar, Matjaž, and Zlatko Rek. "The Ability of a Soil Temperature Gradient-Based Methodology to Detect Leaks from Pipelines in Buried District Heating Channels." Energies 14, no. 18 (2021): 5712. http://dx.doi.org/10.3390/en14185712.

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We carried out several numerical experiments to analyze how different boundary conditions affect the ability to detect small pipeline leaks. Our method is based on determining the soil temperature gradient above a buried district heating channel. The equivalent thermal conductivity of a wet insulation (λeq) value of 0.5 W/(m·K) was used to mimic a small water leakage. To evaluate the heat loss through the channel cross section, the heat conduction model was used for the pipe insulation, the concrete, and the soil, while the convection model was considered within the channel. The following effe

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Lentz, Steven J. "The Mean Along-Isobath Heat and Salt Balances over the Middle Atlantic Bight Continental Shelf." Journal of Physical Oceanography 40, no. 5 (2010): 934–48. http://dx.doi.org/10.1175/2009jpo4214.1.

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Abstract The mean heat and salt balances over the Middle Atlantic Bight continental shelf are investigated by testing the hypothesis that surface fluxes of heat or freshwater are balanced by along-isobath fluxes resulting from the mean, depth-averaged, along-isobath flow acting on the mean, depth-averaged, along-isobath temperature or salinity gradient. This hypothesized balance is equivalent in a Lagrangian frame to a column of water, for example, warming because of surface heating as it is advected southward along isobath by the mean flow. Mean depth-averaged temperatures increase from north

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Liu, Zun Chao, Ke Wang, Tong Liu, Wei Feng Xu, and Min Shan Liu. "Structural Analysis and Optimization of Transition Section of Convex Tube Sheet." Applied Mechanics and Materials 853 (September 2016): 356–60. http://dx.doi.org/10.4028/www.scientific.net/amm.853.356.

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The convex tube sheet which is used in heat recovery boiler consists of three parts: the high temperature tube sheet, the low temperature tube sheet and the transition section.Three-dimensional finite element model of convex tube sheet in new type of heat recovery boiler is established in this paper. Using the ANSYS Workbench software, thermal stress of the convex tube sheet is analyzed. The temperature fields and thermal stress distribution of convex tube sheet are obtained, and its structure strength is checked. The effects of the high temperature tube sheet thickness, low temperature tube s

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Gammoudi, Rabiaa, Houda Brahmi, and Rachid Dhifaoui. "Estimation of Climatic Parameters of a PV System Based on Gradient Method." Complexity 2019 (February 18, 2019): 1–10. http://dx.doi.org/10.1155/2019/7385927.

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The behavior of a photovoltaic generator is generally described by its current-voltage characteristic whose appearance depends on the climatic conditions (temperature and solar radiation). The aim of this work is to show the possibility of identifying the values of these two parameters from an experimental curve Ipv (Vpv) using numerical method. Subsequently, we will also estimate the series and shunt resistors of the equivalent scheme of a PVG. This estimate is certainly beneficial to properly evaluate its energy balance. The integration of these resistances allows us to obtain a new model. I

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Sève, Danielle De, Monique Bernier, Jean-Pierre Fortin, and Anne Walker. "Preliminary analysis of snow microwave radiometry using the SSM/I passive-microwave data: the case of La Grande River watershed (Quebec)." Annals of Glaciology 25 (1997): 353–61. http://dx.doi.org/10.3189/s0260305500014270.

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The general objective of this paper is to estimate the snow water equivalent (SWE) of the La Grande River watershed (northern Quebec), using passive-microwave data from the SSM/I sensor. Particular emphasis is placed on the analysis of SSM/I multitemporal variations.The analysis of a database containing observations for three winters shows that the brightness temperatures of the snow decrease as the SWE increases for shallow snow covers. However, when the SWE is >180–200 mm, the relationship reverses. This is directly linked to the fraction of large snow crystals in the snow cover, since th

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Wang, Zhi Qiang, and Xiao Bin Wu. "Discussion of Method for Computing Temperature Load during Operation Period on High Arch Dam." Applied Mechanics and Materials 470 (December 2013): 976–79. http://dx.doi.org/10.4028/www.scientific.net/amm.470.976.

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According to the existing arch dam design specification, the temperature load is obtained based on analytic solution of infinite long free plate, it only considers the average temperature and the equivalent linear temperature difference of dam section in operation period, the influence of non-linear temperature difference has not been considered. This kind of simplification has some approximation; especially it can not reflect spatial effect of larger temperature gradient changes in the upstream and downstream water level change area. This paper first takes the free plate as an example, has ca

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Sha, Yun Dong, Hao Yuan Wang, and Huan Yu. "Nonlinear Response of Carbon-Carbon Laminated Panels to Random Acoustic Excitation under a Gradient Temperature Field." Applied Mechanics and Materials 696 (November 2014): 23–29. http://dx.doi.org/10.4028/www.scientific.net/amm.696.23.

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Future missions for aircraft will expose structures to severe thermal and acoustic loads. Efficient analysis methods for predicting nonlinear random response and fatigue life are urgently important. This paper presents a finite element model for analyzing nonlinear random dynamic behaviors of Carbon-Carbon composite panels under temperature gradients and Guassian excitations. The temperature distribution over the plate follows double sine curve. A finite element formulation combined with the equivalent linearization approach and normal mode method is established. The global system of equations

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Han, Li Zhi, Liang Liang Chen, and Bo Tian. "Influence of Paving Condition on Longitudinal Cracking of Portland Cement Concrete Pavement." Advanced Materials Research 857 (December 2013): 204–11. http://dx.doi.org/10.4028/www.scientific.net/amr.857.204.

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The curling stresses of rigid pavement are the result of in-situ and built-in temperature gradient. A profound investigation on the reasons causing longitudinal cracking (LC) was conducted in this paper. Based on finite element method (FEM) analysis results obtained from ISLAB 2000, the wheel load stress generated by a single axle load that is applied along the transverse joints is considered to be the critical loading condition for longitudinal cracking. Nonlinear environmental stress due to the curling of Portland Cement Concrete (PCC) was analyzed using the numerical program developed in th

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Margason, Andrew A., Alison M. Anders, Robert J. C. Conrick, and Gerard H. Roe. "Spatially coherent variability in modern orographic precipitation produces asymmetric paleo-glacier extents in flowline models: Olympic Mountains, USA." Earth Surface Dynamics 11, no. 5 (2023): 849–63. http://dx.doi.org/10.5194/esurf-11-849-2023.

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Abstract. Glaciers are sensitive to temporal climate variability. Glacier sensitivity to spatial variability in climate has been much less studied. The Olympic Mountains of Washington state, USA, experience a pronounced orographic precipitation gradient, with modern annual precipitation ranging between ∼6500 and ∼500 mm water equivalent. In the Quinault valley, on the wet side of the range, a glacier extended onto the coastal plain, reaching a maximum position during the Early Wisconsin glaciation. On the dry side of the range, in the Elwha valley, there is no evidence of a large paleo-glacier

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Demirbas, Munise Didem, Didem Çakır, Celal Ozturk, and Sibel Arslan. "Stress Analysis of 2D-FG Rectangular Plates with Multi-Gene Genetic Programming." Applied Sciences 12, no. 16 (2022): 8198. http://dx.doi.org/10.3390/app12168198.

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Functionally Graded Materials (FGMs) are designed for use in high-temperature applications. Since the mass production of FGM has not yet been made, the determination of its thermo-mechanical limits depends on the compositional gradient exponent value. In this study, an efficient working model is created for the thermal stress problem of the 2D-FG plate using Multi-gene Genetic Programming (MGGP). In our MGGP model in this study, data sets obtained from the numerical analysis results of the thermal stress problem are used, and formulas that give equivalent stress levels as output data, with the

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