Готові списки джерел за темами / Textile heat flux sensor

Добірка наукової літератури з теми "Textile heat flux sensor"

Автор: Grafiati

Опубліковано: 15 червня 2024

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Статті в журналах з теми "Textile heat flux sensor":

Tlemsani, Fatima Zohra, Hayriye Gidik, Elham Mohsenzadeh, and Daniel Dupont. "Textile Heat Flux Sensor Used in Stress Detection of Children with CP." Solid State Phenomena 333 (June 10, 2022): 153–60. http://dx.doi.org/10.4028/p-v03hy7.

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This work is part of the European project MOTION (Interreg 2 Seas Mers Zeeën), which aims to develop an exoskeleton for children with cerebral palsy (CP). The developed exoskeleton is equipped with a smart garment in order to detect the stress (e.g. physical, physiological) during the rehabilitation. Five different sensors, i.e. electrocardiogram (ECG), respiratory rate (RR), pressure, galvanic skin response (GSR) and textile heat fluxmeter (THF), are integrated into this smart garment for stress detection. This paper focuses on the development of the textile heat fluxmeter. Several researchers used heat fluxmeters in physiological studies to measure the body heat exchanges with the environment. However, the non-permeability of such fluxmeter gives inaccurate measurements in wet condition. Innovative flexible textile heat fluxmeter may detect, analyze, and monitor the heat and mass transfers with minimum disturbance due to its porosity. Moreover, it is desirable to have flexible sensors when they need to be in contact with the human body, in which the flexibility and non-irritability requirements are of utmost importance.

Gidik, Hayriye, Gauthier Bedek, Daniel Dupont, and Cezar Codau. "Impact of the textile substrate on the heat transfer of a textile heat flux sensor." Sensors and Actuators A: Physical 230 (July 2015): 25–32. http://dx.doi.org/10.1016/j.sna.2015.04.001.

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Villière, Maxime, Sébastien Guéroult, Vincent Sobotka, Nicolas Boyard, Joel Breard, and Didier Delaunay. "Experimental Study on the Identification of the Saturation of a Porous Media through Thermal Analysis." Key Engineering Materials 611-612 (May 2014): 1576–83. http://dx.doi.org/10.4028/www.scientific.net/kem.611-612.1576.

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Resin Transfer Molding (RTM) is among the most commonly used fabrication processes for producing high quality and complex composite structural parts. RTM process consists of placing a dry fibrous preform into a mold cavity. A liquid resin is subsequently injected into that cavity. The consolidation of the part is then obtained by crosslinking in case of a thermosetting resin or by crystallization in case of thermoplastic one. Voids can be created in the porous medium during the flow of the resin. Presence of residual voids in the composite part at the end of the filling drastically affect mechanical performances. Even if several authors have contributed to a better understanding and modeling of the mechanisms of formation and transport of voids during injection, few experimental approaches allowed a direct measurement of the saturation curve. The aim of this study is then to identify the saturation of a fibrous preform by a liquid through thermal analysis. To address this issue, an experimental bench that allows the injection of a fluid into a textile preform has been used. This apparatus combines the measurement of temperatures and wall heat flux densities at several locations. A simplified modeling of the filling front has been performed with FEM using Comsol Multiphysics™. The saturation curve is modeled using several geometric parameters. Saturation is taken into account through the evolution of thermophysical properties. Effective thermophysical properties of the dry and completely-saturated porous medium in transverse and longitudinal directions have been measured by several methods, and their results have been then cross-checked and compared with good accuracy. The evolution between these two states has been modeled. A particular attention has been paid for the modeling of the transverse thermal conductivity. This parameter has been modeled using a periodic homogenization method as a function of the micro- and macro-saturation. The saturation curve parameters are determined by minimizing the cost function defined as the square difference between the measured and computed heat flux. The obtained saturation curve is finally compared with the one measured by a conductometric sensor.

Medvíd', A., and J. Kaupužs. "Heat-flux sensor." Sensors and Actuators A: Physical 42, no. 1-3 (April 1994): 381–83. http://dx.doi.org/10.1016/0924-4247(94)80016-2.

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Onofrei, Elena, Teodor-Cezar Codau, Gauthier Bedek, Daniel Dupont, and Cedric Cochrane. "Textile sensor for heat flow measurements." Textile Research Journal 87, no. 2 (July 22, 2016): 165–74. http://dx.doi.org/10.1177/0040517515627167.

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This paper describes the concept of creating and testing of a textile heat flow sensor in order to determine the amount of heat exchanged between the human body and its environment. The main advantage of this sensor is the permeability to moisture, which allows taking into account the evaporation phenomenon, contrary to the traditional heat flow sensors. Another property related to this new sensor is its flexibility conferred by the textile substrate, which allows it to be applied on deformable surfaces.

Koestoer, Raldi Artono. "Zero method heat flux sensor." Sensors and Actuators 7, no. 3 (July 1985): 145–51. http://dx.doi.org/10.1016/0250-6874(85)85016-2.

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Gifford, Andrew R., David O. Hubble, Clayton A. Pullins, Thomas E. Diller, and Scott T. Huxtable. "Durable Heat Flux Sensor for Extreme Temperature and Heat Flux Environments." Journal of Thermophysics and Heat Transfer 24, no. 1 (January 2010): 69–76. http://dx.doi.org/10.2514/1.42298.

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Weir, G. J. "Surface mounted heat flux sensors." Journal of the Australian Mathematical Society. Series B. Applied Mathematics 27, no. 3 (January 1986): 281–94. http://dx.doi.org/10.1017/s0334270000004938.

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AbstractThe dual integral equations describing heat flow about a circular Heat Flux Sensor on the surface of a layered medium are derived and discussed, together with the extent to which the Heat Flux Sensor measures the heat flow which would occur in the absence of a Heat Flux Sensor. An asymptotic analysis provides new analytical results supporting those derived previously by numerical methods.It is suggested that some properties of the general problem of a Heat Flux Sensor on the surface of a multiply-layered medium can be approximated by a lumped-parameter model depending on only four non-dimensional numbers: namely, two non-dimensional linear heat transfer coefficients, and essentially two non-dimensional thermal resistances. Some support for the lumped parameter model is provided.

Zheng, Xiao Shi, Guang He Cheng, Qing Long Meng, Feng Qi Hao, Xuan Cai Xu, Yu Zhong Yang, Zheng Wei Wang, and Ping Tang. "The Calibration Method of Thermal Heat Flux Sensor Based on Wireless Sensor Networks." Applied Mechanics and Materials 651-653 (September 2014): 538–42. http://dx.doi.org/10.4028/www.scientific.net/amm.651-653.538.

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This paper analyzed the advantages and disadvantages of existing heat flux sensor calibration methods, proposed a calibration method of thermal heat flux sensor based on wireless sensor networks. Experimental results showed that the detection error was reduced from 6% to 2% after calibration. The proposed method has many advantages, such as short calibration time, accurate results, easy installation as well as batching calibration. In a word, this method is available to calibrate heat flux sensors and will have an important significance for accurate measurement of heat flux.

Taler, Dawid, Sławomir Grądziel, and Jan Taler. "Measurement of heat flux density and heat transfer coefficient." Archives of Thermodynamics 31, no. 3 (September 1, 2010): 3–18. http://dx.doi.org/10.2478/v10173-010-0011-z.

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Measurement of heat flux density and heat transfer coefficientThe paper presents the solution to a problem of determining the heat flux density and the heat transfer coefficient, on the basis of temperature measurement at three locations in the flat sensor, with the assumption that the heat conductivity of the sensor material is temperature dependent. Three different methods for determining the heat flux and heat transfer coefficient, with their practical applications, are presented. The uncertainties in the determined values are also estimated.

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Дисертації з теми "Textile heat flux sensor":

Tlemsani, Fatima Zohra. "Mesure des transferts thermiques et hydriques par intégration des fluxmètres thermiques textiles dans un vêtement pour les enfants en situation de polyhandicap." Electronic Thesis or Diss., Université de Lille (2022-....), 2023. http://www.theses.fr/2023ULILN004.

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Les enfants souffrants de la paralysie cérébrale éprouvent un stress psychologique important lors de la rééducation. Ceci est lié à de nombreux facteurs psychologiques comme la peur, l'anxiété et les phobies, et d'autres physiques tels que le poids des appareils de rééducation, leurs frottements sur le corps, et les douleurs liées aux problèmes de motricité. Dans l'état de l'art, il a été montré que les chercheurs ont suivi une approche utilisant les paramètres physiologiques comme bioindicateurs de stress. Ils utilisent principalement des biosignaux tels que la température cutanée, l'électrocardiographie (ECG), l'activité électrodermale (EDA), l'électromyographie (EMG), la respiration, le diamètre de la pupille, l'électroencéphalographie (EEG) pour l'évaluation du stress. Etant donné que les échanges thermiques et hydriques sont fonction de l'évolution de la température, ils peuvent également faire l'objet d'un indicateur de stress, d'autant plus qu'ils représentent un indicateur d'inconfort thermique. Pour cela, dans ce travail, un fluxmètre thermique textile, qui possède des caractéristiques de perméabilité, souplesse et conformité à être utilisé sur la peau, a été développé, analysé et caractérisé. Un dispositif expérimental a été mis en place afin d'établir un système de calibration de fluxmètre. Ensuite le comportement thermo-hydrique des fluxmètres a été analysé dans des conditions de laboratoire. Les fluxmètres thermiques textiles développés ont montré des sensibilités dans le même ordre de grandeur que le capteur étalon. De plus, l'étude des performances de fluxmètre a montré un comportement similaire à celle du capteur étalon. Par conséquent, des tests de stress ont été menés sur 20 volontaires adultes en bonne santé, de différentes tranches d'âges, et différents gendres, femmes et hommes, et sur deux enfants, de 7 ans et 12 ans, également en bonne santé. Trois différents types d'activité ont été réalisés pour provoquer le stress, à savoir, des activités mathématiques, des jeux de réalité virtuelle et une activité sportive. Cela a été dans l'objectif de stimuler différents types de stress, i.e. le stress positif (eustress), le stress négatif et le stress physique, respectivement. Les résultats des tests montrent un comportement similaire entre les deux fluxmètres (textile et étalon), et une corrélation positive entre le comportement de l'électrocardiogramme et celui du fluxmètre. Un lien a été établi dans la majorité des cas entre le retour des volontaires concernant le stress ressenti, et leurs réponse thermo-hydrique relevée par le fluxmètre thermique textile
Children with cerebral palsy experience significant psychological stress during rehabilitation. This is related to many psychological factors such as fear, anxiety and phobias, and physical factors such as the weight of the rehabilitation devices, their friction on the body, and the pain related to motor problems. In the state of art, it has been shown that researchers have followed an approach using physiological parameters as biomarkers of stress. They mainly use biosignals such as skin temperature (ST), electrocardiography (ECG), electrodermal activity (EDA), electromyography (EMG), respiration, pupil diameter, electroencephalography (EEG) for stress assessment. Since thermal and hydric exchanges are a function of temperature evolution, they can also be an indicator of stress, especially since they represent an indicator of thermal discomfort. For this purpose, in this work, a textile heat fluxmeter, which has characteristics of permeability, flexibility and suitability for use on the skin, has been developed, analyzed and characterized. An experimental device was set up in order to establish a calibration system of the fluxmeter. Then the thermo-hydric behavior of the fluxmeters was analyzed under laboratory conditions. The developed textile heat fluxmeter showed similar sensitivities as the gold standard sensor. Moreover, the study of the fluxmeter performance showed a similar behavior to that of the standard sensor. Therefore, stress tests were conducted on 20 healthy adult volunteers of different ages and genders, women and men, and on two children, 7 and 12 years old, also healthy. Three different types of activities were performed to induce stress, namely, mathematical activities, virtual reality games and a sports activity. This was with the objective of stimulating different types of stress, i.e. positive stress (eustress), negative stress and physical stress, respectively. The results of the tests show a similar behavior between the two fluxmeters (textile and standard), and a positive correlation between the behavior of the electrocardiogram and the fluxmeter. A relation was established in the majority of cases between the volunteers' feedback on the stress they felt and their thermo-hydric response measured by the textile heat fluxmeter

Sahu, Suraj Kant. "Model-Supported Heat- Flux Sensor Development." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1534438533145097.

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Thompson, Jordan Lee. "Direct Measurement of Boiling Water Heat Flux for Predicting and Controlling Near Critical Heat Flux." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/23091.

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A novel method for measuring heat flux of boiling water is designed and built to study critical heat flux (CHF) and observe the response of a heat flux sensor when CHF occurs. A high temperature heat flux sensor is embedded in the wall of a pipe to get a direct measurement of the surface heat flux and sensor temperature. By submerging the pipe in water and applying a controlled heat flux to the inside diameter over the area where the sensor is located, boiling is created on the outer surface while measuring the heat flux. The heat flux is gradually increased up to CHF and the heat flux response is observed to determine if the heat flux sensor could sense CHF when it occurred. The heat flux sensor is able to consistently measure the value for CHF, which is approximately 510 kW/m" for this system. It is also observed during the experiments that the heat flux response undergoes an inflection of the heat transfer coefficient at a consistent temperature just before reaching CHF. This observed inflection caused the heat flux response to deviate from its cubic relationship with the temperature and drastically increase for a very small change in temperature. This inflection response can be used as an indication for approaching CHF and can also be used to approximate its value without prior knowledge of when it occurs.
Master of Science

Earp, Brian Edward. "Convective Heat Flux Sensor Validation, Qualification and Integration in Test Articles." Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/77171.

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The purpose of this study is to quantify the effects of heat flux sensor design and interaction with both test article material choice and geometry on heat flux measurements. It is the public domain component of a larger study documenting issues inherent in heat flux measurement. Direct and indirect heat flux measurement techniques were tested in three thermally diverse model materials at the same Mach 6 test condition, with a total pressure of 1200 psi and total temperature of 1188° R, and compared to the steady analytic Fay-Riddell solution for the stagnation heat flux on a hemisphere. A 1/8 in. fast response Schmidt-Boelter gage and a 1/16 in. Coaxial thermocouple mounted in Â¾ in. diameter stainless steel, MACOR, and Graphite hemispheres were chosen as the test articles for this study. An inverse heat flux calculation was performed using the coaxial thermocouple temperature data for comparison with the Schmidt-Boelter gage. Before wind tunnel testing, the model/sensor combinations were tested in a radiative heat flux calibration rig at known static and dynamic heat fluxes from 1 to 20 BTU/ft2/s. During wind tunnel testing, the chosen conditions yielded stagnation point convective heat flux of 15-60 BTU/ft2/s, depending on the stagnation point wall temperature of the model. A computational fluid dynamic study with conjugate heat transfer was also undertaken to further study the complex mechanisms at work. The overall study yielded complex results that prove classic methodology for inverse heat flux calculation and direct heat flux measurement require more knowledge of the thermal environment than a simple match of material properties. Internal and external model geometry, spatial and temporal variations of the heat flux, and the level of thermal contact between the sensor and the test article can all result in a calculated or measured heat flux that is not correct even with a thermally matched sensor. The results of this study supported the conclusions of many previous studies but also examined the complex physics involved across heat flux measurement techniques using new tools, and some general guidance for heat flux sensor design and use, and suggestions for further research are provided.
Ph. D.

Pullins, Clayton Anthony. "High Temperature Heat Flux Measurement: Sensor Design, Calibration, and Applications." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/27789.

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This effort is focused on the design, calibration, and implementation of a high temperature heat flux sensor for thermal systems research and testing. The High Temperature Heat Flux Sensor (HTHFS) was designed to survive in the harsh thermal environments typically encountered in hypersonic flight, combustion and propulsion research, and large-scale fire testing. The sensor is capable of continuous use at temperatures up to 1000 â ¦C. Two methods for steady-state calibration of the HTHFS at elevated temperatures have been developed as a result of this research. The first method employs a water-cooled heat flux sensor as a reference standard for the calibration. The second method utilizes a blackbody radiant source and a NIST calibrated optical pyrometer as the calibration standard. The HTHFS calibration results obtained from both methods compare favorably with the theoretical sensitivity versus temperature model. Implementation of the HTHFS in several types of transient thermal testing scenarios is also demonstrated herein. A new data processing technique is used to interpret the measurements made by the HTHFS. The Hybrid Heat Flux (HHF) method accounts for the heat flow through the sensor and the heat storage in the sensor, and thus renders the HTHFS virtually insensitive to the material on which it is mounted. The calibrated output of the HTHFS versus temperature ensures accuracy in the measurements made by the sensor at high operating temperatures.
Ph. D.

Raphael-Mabel, Sujay Anand. "Design and Calibration of a Novel High Temperature Heat Flux Sensor." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/31688.

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Heat flux gages are important in applications where measurement of the transfer of energy is more important than measurement of the temperature itself. There is a need for a heat flux sensor that can perform reliably for long periods of time in high temperature and high heat flux environment. The primary objective is to design and build a heat flux sensor that is capable of operating for extended periods of time in a high heat flux and high temperature environment. A High Temperature Heat Flux Sensor (HTHFS) was made by connecting 10 brass and steel thermocouple junctions in a thermopile circuit. This gage does not have a separate thermal resistance layer making it easier to fabricate. The HTHFS was calibrated in a custom-made convection calibration facility using a commercial Heat Flux Microsensor (HFM) as the calibration standard. The measured sensitivity of the HTHFS was 20.4 Â±2.0Ã¬V/(W/cm2). The measured sensitivity value matched with the theoretically calculated value of 20.5 Ã¬V/(W/cm2). The average sensitivity of the HTHFS prototype was one-fifth of the sensitivity of a commercially available HFM. Better ways of mounting the HTHFS in the calibration stand have been recommended for future tests on the HTHFS for better testing. The HTHFS has the potential to be made into a microsensor with thousands of junctions added together in a thermopile circuit. This could lead to a heat flux sensor that could generate large signals (~few mV) and also be capable of operating in high heat flux and high temperature conditions.
Master of Science

Calisto, Hugo Miguel Filipe. "Transient transpiration radiometer : development of a heat flux sensor for high aggressivity environments." Doctoral thesis, Universidade de Aveiro, 2013. http://hdl.handle.net/10773/12457.

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Doutoramento em Engenharia Mecânica
The development of a new instrument for the measurement of convective and radiative is proposed, based on the transient operation of a transpiration radiometer. Current transpiration radiometers rely on steady state temperature measurements in a porous element crossed by a know gas mass flow. As a consequence of the porous sensing element’s intrinsically high thermal inertia, the instrument’s time constant is in the order of several seconds. The proposed instrument preserves established advantages of transpiration radiometers while incorporating additional features that broaden its applicability range. The most important developments are a significant reduction of the instrument’s response time and the possibility of separating and measuring the convective and radiative components of the heat flux. These objectives are achieved through the analysis of the instrument’s transient response, a pulsed gas flow being used to induce the transient behavior.
Propõe-se o desenvolvimento de um novo instrumento para medição de fluxos de calor convectivos e radiativos, baseado na operação de um radiómetro de transpiração em regime transitório. Os radiómetros de transpiração atuais baseiam-se em medições de temperatura em regime estacionário num elemento poroso atravessado por um caudal mássico gasoso conhecido. Como consequência da inércia térmica intrinsecamente elevada do elemento sensível poroso, a constante de tempo do instrumento é da ordem dos segundos. O instrumento proposto preservará as vantagens estabelecidas dos radiómetros de transpiração incorporando características adicionais que alargarão a gama de aplicabilidade. As novas características mais importantes serão uma redução significativa do tempo de resposta do instrumento e a possibilidade de medir separadamente as componentes radiativa e convectiva do fluxo de calor. Estes objetivos serão conseguidos através da análise da resposta transitória do instrumento, utilizando-se um caudal pulsado de gás para induzir o comportamento transitório.

Nilsson, Erik. "Flux Attenuation due to Sensor Displacement over Sea." Thesis, Uppsala University, Department of Earth Sciences, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-8024.

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In this study the flux attenuation due to sensor displacement has been investigated over sea using an extensive set of data from the "Ocean Horizontal Array Turbulence Study". All previous investigations of the flux attenuation have been performed over land.

A function developed for correcting fluxes in the homogenous surface layer was compared to measured flux attenuation. This investigation revealed the possibility to find new functions describing the flux attenuation when measurements are carried out over sea. From the measured flux attenuation studied here a change in the form of correction functions was required to improve the estimated flux loss. The most significant difference found in this report compared to the previous landbased study Horst (2006) is for stable conditions, where significantly less flux loss is found over sea. Two new functions describing the attenuation due to sensor displacement over sea have been constructed.

One of these expressions has a discontinuity at z/L = 0. This is supported by measured flux attenuation. A reasonable interpretation is; however, that this discontinuity is caused by two separate turbulence regimes near neutrality on the stable and unstable side respectively. The discontinuity is thus not believed to be an effect merely of stability. A second correction function which is continuous over all stabilities has therefore also been constructed. These two functions and the correction function from Horst (2006) have been compared to measured flux loss. Based on this comparison the continuous correction function is recommended for correcting scalar fluxes measured over sea. It should be noted, however, that this expression only describes the mean attenuation and has been constructed from measurements at 5 and 5.5 m above mean sea level.

The theoretical basis used in the development of the function for flux attenuation over land allows for a direct link between a spectral shape and the attenuation expression. This link has been preserved for the new expressions presented in this report. The spectral shape corresponding to the continuous correction function has been compared to measured mean cospectra and also to the cospectra from Horst (2006) corresponding to crosswind displacements.

At a height of 10 m and a sensor displacement of 0.2 m the mean flux attenuation is about 1.3-4% in the stability interval −1 < z/L < 1.5 when using the new correction functions presented in this report.

Wilson, Scott Dean. "FABRICATION AND TESTING OF A NONSTANDARD THIN-FILM HEAT FLUX SENSOR FOR POWER SYSTEM APPLICATIONS." Cleveland State University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=csu1323837602.

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MacPherson, William Neil. "Fibre optic sensors for applications in turbomachinery research." Thesis, Heriot-Watt University, 1999. http://hdl.handle.net/10399/585.

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Книги з теми "Textile heat flux sensor":

Tsai, Benjamin K. Heat-flux sensor calibration. Gaithersburg, Md: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, Physics Laboratory, Optical Technology Division, 2004.

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Fralick, Gustave C. Thin film heat flux sensor of improved design. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 2002.

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G, DeAnna R., Mehregany M, and Lewis Research Center, eds. Experimental performance of a micromachined heat flux sensor. [Cleveland, Ohio]: National Aeronautics and Space Administration, Lewis Research Center, 1998.

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John, Wrbank, Blaha Charles, and NASA Glenn Research Center, eds. Thin film heat flux sensor of improved design. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 2002.

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M, Spuckler Charles, and United States. National Aeronautics and Space Administration., eds. Non-contact heat flux measurement using a transparent sensor. [Washington, DC]: National Aeronautics and Space Administration, 1993.

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A, Cyr M., Strange R. R, and United States. National Aeronautics and Space Administration., eds. Turbine blade and vane heat flux sensor development phase 2. [Washington, DC]: National Aeronautics and Space Administration, 1985.

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A, Cyr M., Strange R. R, and United States. National Aeronautics and Space Administration, eds. Turbine blade and vane heat flux sensor development phase 2. [Washington, DC]: National Aeronautics and Space Administration, 1985.

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F, Barrows Richard, United States. National Aeronautics and Space Administration., and United States. Dept. of Energy. Office of Vehicle and Engine Research and Development., eds. Prototype thin-film thermocouple/heat-flux sensor for a ceramic-insulated diesel engine. Washington, D.C: U.S. Dept. of Energy, Conservation and Renewable Energy, Office of Vehicle and Engine R&D, 1988.

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Частини книг з теми "Textile heat flux sensor":

Sapozhnikov, Sergey Z., Vladimir Yu Mityakov, and Andrey V. Mityakov. "Heat Flux Measurement and Heat Flux Sensor." In Heatmetry, 1–17. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-40854-1_1.

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Haruyama, T. "Peltier Heat Flux Sensor for Cryogenic Use." In Advances in Cryogenic Engineering, 1897–904. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/978-1-4615-4215-5_120.

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Ankita, H. M., K. S. Lakshmi, P. Anoop, B. Sundar, K. K. Raveendra Babu, L. Sowmianarayanan, and G. Ayyappan. "Modeling of Gardon Gage Heat Flux Sensor Under Aerothermal Environment." In Lecture Notes in Mechanical Engineering, 749–56. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-8025-3_71.

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Rout, Anil Kumar, Niranjan Sahoo, and Pankaj Kalita. "Coaxial Thermal Probe as a Heat Flux Sensor: An Analytical, Numerical, and Experimental Approach." In Lecture Notes in Mechanical Engineering, 57–65. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-7779-6_5.

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Mishra, S. R., MD Shamshuddin, P. K. Pattnaik, and Subhajit Panda. "Thermal Radiative Flux Effect on Flow and Heat Transfer of CNTs-Water Nanofluid Through Convective Heated Riga Sensor Surface." In Biosensors: Developments, Challenges and Perspectives, 213–35. Singapore: Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-3048-3_11.

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Roediger, T., H. Knauss, J. Srulijes, F. Seiler, and E. Kraemer. "A novel fast-response heat-flux sensor for measuring transition to turbulence in the boundary layer behind a moving shock wave." In Shock Waves, 415–20. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-85168-4_66.

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Al-Far, S., A. Qubian, G. Daviesm, and T. Burns. "CFD Modelling of Radiative-Convective Heat Flux Sensor." In Mathematics of Heat Transfer, 61–66. Oxford University PressOxford, 1998. http://dx.doi.org/10.1093/oso/9780198503583.003.0006.

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Abstract A heat flux sensor to determine the relative contribution of convective and radiative to the total heat transfer has been developed. A selection of sensor sizes has been investigated for a range of operational heat transfer modes (radiative-convective, radiative and convective). A CFD simulation has been used to assess their suitability for further modelling work, and the results from both experimental and CFD work have been compared.

Pallikarakis, Christos N., Dionysios I. Kolaitis, and Maria A. Founti. "Characteristics of surface litter fires: A systematic experimental study." In Advances in Forest Fire Research 2022, 1591–96. Imprensa da Universidade de Coimbra, 2022. http://dx.doi.org/10.14195/978-989-26-2298-9_242.

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This work presents the results of laboratory experiments, focused on the characterization of surface wildland fires propagating in a litter fuel bed. A series of fire tests are conducted using an inclinable combustion table, measuring 2 m x 2 m, aiming to identify the effects of several important operational parameters on the characteristics of the developing fire. The parameters studied are the slope angle, the fuel load, the fuel moisture content and the type of ignition. A broad sensor network is installed in the combustion table, including 86 thermocouples, 4 bi-directional velocity probes, 2 Pitot tubes, 3 heat flux sensors, 2 optical cameras and a real-time gas analyser. The obtained measurements are used to determine the time evolution of several characteristic parameters, such as the Rate of Spread and the Heat Release Rate. The construction of a 2D temperature field from the thermocouples that rest on a plane parallel to the propagation axis, illustrates important flame characteristics. It is found that the fireâ€™s Rate of Spread increases with increasing slope angle and fuel load, whereas it decreases with increasing Fuel Moisture Content. The Rate of Spread does not seem to reach a steady state for the fires propagating up-slope. The Heat Release Rate increases with increasing slope and, more intensely, fuel load. As expected, the increase of the Fuel Moisture Content decreases the Heat Release Rate.

Silva, Margarida, J. Ribeiro, A. Moreira, P. Fernandes, Gilda Santos, Rita Marques, João B. L. M. Campos, and Soraia F. Neves. "Usage of pouches with phase change materials (PCMs) to increase the thermal performance of a firefighter jacket - development and thermal behaviour evaluation of the multilayer system." In Advances in Forest Fire Research 2022, 1809–14. Imprensa da Universidade de Coimbra, 2022. http://dx.doi.org/10.14195/978-989-26-2298-9_280.

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The growth in size and duration of wildland fires in recent years and the increasingly demand for high-performance protective clothing, has led Thermal Protective Clothing (TPC) research and development to seek solutions to minimise firefighter thermal load and skin burns. In this context, the present work was developed under the framework of the DIF-Jacket project (https://difjacketproject.fe.up.pt), with the main goal being the development of a new multilayer system with phase change materials (PCMs) to be used in a jacket of wildland firefighters and the subsequent development of an experimental procedure to evaluate its transient behaviour. For that purpose, a small-scale multilayer system was developed. It consisted of three layers: an outer textile layer, a pouch with PCMs (intermediate layer) and an inner textile layer. The pouch with PCMs was incorporated into the multilayer system to absorb the incoming heat from the environment, to increase the time that a firefighter can be exposed to it. Subsequently, an experimental set-up was then developed to evaluate the transient behaviour of the solution with PCMs, simulating the different phases to which a firefighter is exposed to (i.e., direct exposure to a radiative heat flux followed by a post-fire period). Therefore, the effect of some pouch-related parameters on the multilayer system thermal behaviour was studied, namely different geometries of the pouches (square and rectangular) and two types of PCMs. As main conclusions, similar tendencies were obtained with the square and rectangular pouches. The best temperature homogeneity of the PCM pouches was obtained with the macroencapsulated PCM. The incorporation of PCMs in the multilayer system significantly delays its heating. Further research must be conducted to delay even more the increase of temperature during exposure time. Nevertheless, the described set-up can be used to analyse several opposing requirements of a multilayer system with PCM pouches integrated, allowing the correlation of geometrical features, and properties of the system components (either textiles or PCM pouches) with the system transient temperature behaviour.

Majumdar, Pradip, and Amartya Chakrabarti. "Diverse Applications of Graphene-Based Polymer Nanocomposites." In Research Anthology on Synthesis, Characterization, and Applications of Nanomaterials, 973–1001. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-8591-7.ch040.

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Polymer nanocomposites are unique materials reinforced with nanoscale additives. Among a variety of nanomaterials available to act as filler additives in different polymer matrices, graphene is the most versatile one. Graphene-based polymer nanocomposites have improved electrical, mechanical, chemical, and thermal properties, which make them suitable for applications in the electronics, energy, sensor, and space sectors. Graphene, the nanosized filler, can be prepared using either a top-down or a bottom-up approach and dispersed in the polymer matrix utilizing different conventional techniques. The nanocomposite materials find usage in suitable area of applications depending on their specific characteristics. This chapter discusses the current state-of-the-art manufacturing techniques for graphene and graphene-based nanocomposite materials. Application of graphene-based polymer nanocomposites in the various fields with an emphasis on the areas high heat flux applications requiring enhanced thermal conductivity will be an additional major focus of this chapter.

Тези доповідей конференцій з теми "Textile heat flux sensor":

Gridchin, Victor A., and Oleg V. Lobach. "Heat flux sensor modeling." In 2009 International Student School and Seminar on Modern Problems of Nanoelectronics, Micro- and Nanosystem Technologies (INTERNANO). IEEE, 2009. http://dx.doi.org/10.1109/internano.2009.5335630.

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Williams, Albert J. "Acoustic Heat-Flux Sensor." In OCEANS 2019 - Marseille. IEEE, 2019. http://dx.doi.org/10.1109/oceanse.2019.8867308.

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Sapozhnikov, Sergey Z., Vladimir Y. Mitiakov, and Andrei V. Mitiakov. "HEAT FLUX SENSOR FOR HEAT TRANSFER INVESTIGATION." In International Heat Transfer Conference 11. Connecticut: Begellhouse, 1998. http://dx.doi.org/10.1615/ihtc11.2950.

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Cousin, P., C. Gehin, J. Poujaud, and N. Noury. "A portable heat flux sensor." In 2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC). IEEE, 2014. http://dx.doi.org/10.1109/embc.2014.6943666.

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Lobach, O. V., and V. A. Gridchin. "Smart wireless heat flux sensor." In 2014 12th International Conference on Actual Problems of Electronics Instrument Engineering (APEIE). IEEE, 2014. http://dx.doi.org/10.1109/apeie.2014.7040854.

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Murthy, A. V. "Temperature and Flux Scales for Heat-Flux Sensor Calibration." In TEMPERATURE: Its Measurement and Control in Science and Industry; Volume VII; Eighth Temperature Symposium. AIP, 2003. http://dx.doi.org/10.1063/1.1627207.

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Lukyano, Gennadij, Ilya Kovalskiy, Sergei Makarov, and Thomas Seeger. "Heat flux sensor based on ferroelectric." In 2017 20th Conference of Open Innovations Association (FRUCT). IEEE, 2017. http://dx.doi.org/10.23919/fruct.2017.8071320.

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Lyu, Wen, Yaohui Ji, Tong Zhang, Guanyu Liu, Jijun Xiong, and Qiulin Tan. "A Novel Ceramic-Based Heat Flux Sensor Applied for Harsh Heat Flux Measurement." In 2018 IEEE Sensors. IEEE, 2018. http://dx.doi.org/10.1109/icsens.2018.8589682.

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Gridchin, Victor A., Oleg V. Lobach, Regina P. Dikareva, and Elena L. Bakaleynik. "Modeling of silicon micromachined heat flux sensor." In 2010 11th International Conference and Seminar of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM 2010). IEEE, 2010. http://dx.doi.org/10.1109/edm.2010.5568640.

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Gridchin, Victor A., Oleg V. Lobach, and Regina P. Dikareva. "3D model of micromachined heat flux sensor." In 2010 10th International Scientific-Technical Conference on Actual Problems of Electronic Instrument Engineering - APEIE. IEEE, 2010. http://dx.doi.org/10.1109/apeie.2010.5677325.

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Звіти організацій з теми "Textile heat flux sensor":

Tsai, Benjamin K., Charles E. Gibson, Annageri V. Murthy, Edward A. Early, David P. Dewitt, and Robert D. Saunders. Heat-flux sensor calibration. Gaithersburg, MD: National Institute of Standards and Technology, 2004. http://dx.doi.org/10.6028/nist.sp.250-65.

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Blanchat, Thomas, and Charles Hanks. Comparison of the high temperature heat flux sensor to traditional heat flux gages under high heat flux conditions. Office of Scientific and Technical Information (OSTI), April 2013. http://dx.doi.org/10.2172/1096950.

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Boyle, J. P. Measurement of Net Ocean Surface Heat Flux During the ONR CBLAST Low Wind, Convective Regime Field Program Using a New Ocean Surface Contact Sensor. Fort Belvoir, VA: Defense Technical Information Center, September 2003. http://dx.doi.org/10.21236/ada630004.

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Kamai, Tamir, Gerard Kluitenberg, and Alon Ben-Gal. Development of heat-pulse sensors for measuring fluxes of water and solutes under the root zone. United States Department of Agriculture, January 2016. http://dx.doi.org/10.32747/2016.7604288.bard.

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The objectives defined for this study were to: (1) develop a heat-pulse sensor and a heat-transfer model for leaching measurement, and (2) conduct laboratory study of the sensor and the methodology to estimate leaching flux. In this study we investigated the feasibility for estimating leachate fluxes with a newly designed heat-pulse (HP) sensor, combining water flux density (WFD) with electrical conductivity (EC) measurements in the same sensor. Whereas previous studies used the conventional heat pulse sensor for these measurements, the focus here was to estimate WFD with a robust sensor, appropriate for field settings, having thick-walled large-diameter probes that would minimize their flexing during and after installation and reduce associated errors. The HP method for measuring WFD in one dimension is based on a three-rod arrangement, aligned in the direction of the flow (vertical for leaching). A heat pulse is released from a center rod and the temperature response is monitored with upstream (US) and downstream (DS) rods. Water moving through the soil caries heat with it, causing differences in temperature response at the US and DS locations. Appropriate theory (e.g., Ren et al., 2000) is then used to determine WFD from the differences in temperature response. In this study, we have constructed sensors with large probes and developed numerical and analytical solutions for approximating the measurement. One-dimensional flow experiments were conducted with WFD ranging between 50 and 700 cm per day. A numerical model was developed to mimic the measurements, and also served for the evaluation of the analytical solution. For estimation WFD, and analytical model was developed to approximate heat transfer in this setting. The analytical solution was based on the work of Knight et al. (2012) and Knight et al. (2016), which suggests that the finite properties of the rods can be captured to a large extent by assuming them to be cylindrical perfect conductors. We found that: (1) the sensor is sensitive for measuring WFD in the investigated range, (2) the numerical model well-represents the sensor measurement, and (2) the analytical approximation could be improved by accounting for water and heat flow divergence by the large rods.

Jones, Scott B., Shmuel P. Friedman, and Gregory Communar. Novel streaming potential and thermal sensor techniques for monitoring water and nutrient fluxes in the vadose zone. United States Department of Agriculture, January 2011. http://dx.doi.org/10.32747/2011.7597910.bard.

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The “Novel streaming potential (SP) and thermal sensor techniques for monitoring water and nutrient fluxes in the vadose zone” project ended Oct. 30, 2015, after an extension to complete travel and intellectual exchange of ideas and sensors. A significant component of this project was the development and testing of the Penta-needle Heat Pulse Probe (PHPP) in addition to testing of the streaming potential concept, both aimed at soil water flux determination. The PHPP was successfully completed and shown to provide soil water flux estimates down to 1 cm day⁻¹ with altered heat input and timing as well as use of larger heater needles. The PHPP was developed by Scott B. Jones at Utah State University with a plan to share sensors with Shmulik P. Friedman, the ARO collaborator. Delays in completion of the PHPP resulted in limited testing at USU and a late delivery of sensors (Sept. 2015) to Dr. Friedman. Two key aspects of the subsurface water flux sensor development that delayed the availability of the PHPP sensors were the addition of integrated electrical conductivity measurements (available in February 2015) and resolution of bugs in the microcontroller firmware (problems resolved in April 2015). Furthermore, testing of the streaming potential method with a wide variety of non-polarizable electrodes at both institutions was not successful as a practical measurement tool for water flux due to numerous sources of interference and the M.S. student in Israel terminated his program prematurely for personal reasons. In spite of these challenges, the project funded several undergraduate students building sensors and several master’s students and postdocs participating in theory and sensor development and testing. Four peer-reviewed journal articles have been published or submitted to date and six oral/poster presentations were also delivered by various authors associated with this project. We intend to continue testing the "new generation" PHPP probes at both USU and at the ARO resulting in several additional publications coming from this follow-on research. Furthermore, Jones is presently awaiting word on an internal grant application for commercialization of the PHPP at USU.