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Relevant bibliographies by topics / Convective heat transfer coefficient (h)

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Academic literature on the topic 'Convective heat transfer coefficient (h)'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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Journal articles on the topic "Convective heat transfer coefficient (h)"

1

Jani, Jaronie Mohd, Sunan Huang, Martin Leary, and Aleksandar Subic. "Analysis of Convective Heat Transfer Coefficient on Shape Memory Alloy Actuatorunder Various Ambient Temperatures with Finite Difference Method." Applied Mechanics and Materials 736 (March 2015): 127–33. http://dx.doi.org/10.4028/www.scientific.net/amm.736.127.

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The demand for shape memory alloy (SMA) actuators for technical applications is steadily increasing; however SMA may have poor deactivation time due to relatively slow convective cooling. Convection heat transfer mechanism plays a critical role in the cooling process, where an increase of air circulation around the SMA actuator (i.e. forced convection) provides a significant improvement in deactivation time compared to the natural convection condition. The rate of convective heat transfer, either natural or forced, is measured by the convection heat transfer coefficient, which may be difficult

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Zhang, Ruihao, Sixian Wang, Shan Qing, Zhumei Luo, and Zhang Xiaohui. "Research on convective heat transfer characteristics of Fe3O4magnetic nanofluids under vertical magnetic field." Thermal Science, no. 00 (2021): 151. http://dx.doi.org/10.2298/tsci201215151z.

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This paper focuses on the convective heat transfer characteristics of Fe3O4 /Water magnetic nanofluids under laminar and turbulent conditions. After verifying the accuracy of the experimental apparatus, the effects of magnetic field strength, concentration, Reynolds number and temperature on the convective heat transfer coefficient have been studied. The convective heat transfer characteristics of nanofluids under laminar and turbulent flow conditions were studied in depth, and the influence of each factor on the heat transfer coefficient was analyzed by orthogonal experimental design method.

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Rozas, Carlos, Oswaldo Erazo, Virna Ortiz-Araya, Rodrigo Linfati, and Claudio Montero. "Experimental and Statistical Determination of Convective Heat and Mass Transfer Coefficients for Eucalyptus nitens Sawn Wood Drying." Forests 15, no. 8 (2024): 1287. http://dx.doi.org/10.3390/f15081287.

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This study aimed to develop a model using experimentally obtained convective heat and mass transfer coefficients to predict the effect of temperature, humidity, and drying rate on wood drying. Tangential wood samples of Eucalyptus nitens (H. Deane & Maiden) were used in the investigation. The experimental design consisted of two temperature levels (40 °C and 55 °C), two relative humidity levels (55% and 75%), and two air velocity settings (2 m·s−1 and 3 m·s−1). The experiments were conducted under a constant evaporation rate, spanning the maximum and critical moisture content in the wood.

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Luo, Chuan, Chuan Li, Xiaorong Wan, and Zhengang Zhao. "Convective Heat Transfer Coefficient of Insulation Paper–Oil Contact Surface of Transformer Vertical Oil Channel." Coatings 13, no. 1 (2023): 81. http://dx.doi.org/10.3390/coatings13010081.

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Insulation paper is the primary inter-turn insulation material for transformer windings. However, insulation paper is a poor conductor of heat and seriously impacts the natural convective heat dissipation in the winding oil channels. In order to study the convective heat transfer performance of the transformer vertical oil channel, the heat transfer characteristics of the two-dimensional boundary layer of the insulation paper–oil contact surface were analysed, and a characteristic number equation with a roughness correction factor was established. Based on the similarity principle and modellin

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Anderson, Ann M. "Decoupling Convective and Conductive Heat Transfer Using the Adiabatic Heat Transfer Coefficient." Journal of Electronic Packaging 116, no. 4 (1994): 310–16. http://dx.doi.org/10.1115/1.2905703.

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In many heat transfer situations, such as those found in the electronics cooling field, more than a single mode of heat transfer occurs. For example, modules on a printed circuit board dissipate heat through convection to the air, through conduction to the board and through radiation to the surroundings. The adiabatic heat transfer coefficient, had, works well in such situations because it describes the change in wall temperature due to each incremental change in the convective heat transfer rate (due to conduction, radiation, or generation in the wall). The value of had is independent of the

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Chowdhury, Manojit, Ankita Banerjee, Rahul Das, Shrilekha Das, and Kamlesh Prasad. "Influence of Temperature and Mass Flow Rate on Heat Transfer Characteristics in Parallel Flow Corrugated Plate Heat Exchanger." Journal of Agricultural Engineering (India) 62, no. 1 (2025): 120–34. https://doi.org/10.52151/jae2025621.1917.

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Efficient heat exchangers (HEs) are essential components in various industrial processes, enabling transfer of thermal energy between fluids. Current research investigated heat transfer and fluid flow characteristics of a corrugated surface type parallel flow plate heat exchanger (PHE) with water as a heat transfer fluid. The study aims to enhance our understanding of how these operational parameters impact heat transfer performance and provide insights into optimizing the design and operation of such HEs for improved energy efficiency. The performance of HE was evaluated at variable temperatu

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Gao, Ling, Wen Guang Geng, Xiao Xu Ma, Xiu Li Ma, Guang Liang Luo, and Xuan You Li. "An Experimental Investigation on the Heat Transfer Coefficient of Oscillating Heat Pipes." Advanced Materials Research 732-733 (August 2013): 78–82. http://dx.doi.org/10.4028/www.scientific.net/amr.732-733.78.

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This paper presents an experimental study on total heat transfer coefficient (ht) in oscillating heat pipe heat exchanger hot air flow tunnels, ht plays an important role in the oscillating heat pipes design process. In this paper, ht and the convective heat transfer coefficient (h) was investigated by experimentally and theoretical calculation respectively. From experimental study, the relationship between the ratio of heat transfer coefficient and the relative humidity is obtained. The results show that the ratio of ht to h increases from 5 to 20 as the relative humidity of the hot gas incre

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Xu, Qian, Yunbing Wu, Ye Chen, and Zhengwei Nie. "Unlocking the Thermal Efficiency of Irregular Open-Cell Metal Foams: A Computational Exploration of Flow Dynamics and Heat Transfer Phenomena." Energies 17, no. 6 (2024): 1305. http://dx.doi.org/10.3390/en17061305.

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An open-cell metal foam has excellent characteristics such as low density, high porosity, high specific surface area, high thermal conductivity, and low mass due to its unique internal three-dimensional network structure. It has gradually become a new material for enhanced heat transfer in industrial equipment, new compact heat exchangers, microelectronic device cooling, etc. This research established a comprehensive three-dimensional structural model of open-cell metal foams utilizing Laguerre–Voronoi tessellations and employed computational fluid dynamics to investigate its flow dynamics and

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Schutzeichel, Maximilian Otto Heinrich, Thorben Strübing, Ozan Tamer, Thomas Kletschkowski, Hans Peter Monner, and Michael Sinapius. "Experimental and Numerical Investigation of a Multifunctional CFRP towards Heat Convection under Aircraft Icing Conditions." Applied Mechanics 3, no. 3 (2022): 995–1018. http://dx.doi.org/10.3390/applmech3030056.

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A combined experimental and numerical approach for the analysis of convective heat transfer from a multifunctional flat plate specimen under aircraft icing conditions is presented. The experimental setup including a heat control and measurement system that is installed in a de-icing test bed. The ambient temperature (θa=[253,283]K), air velocity (va={0,15,30}ms), and angle of attack (α={10,30}∘) are varied, and their influence on heat transfer during local Joule heating is discussed. The numerical approach utilises the results to compute the convective heat transfer coefficients (HTC) based on

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Farhadi, M., K. Sedighi, and M. M. Madani. "Convective cooling of tandem heated squares in a channel." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 223, no. 4 (2008): 965–78. http://dx.doi.org/10.1243/09544062jmes1078.

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This article elaborates on the numerical simulation of forced convective incompressi-ble flow in a horizontal plane channel and heat transfer over two isothermal tandem square cylinders. Finite-volume method was applied to discretize the momentum and energy equations. This study details the effects of S/ H (gap between two squares), Reynolds number, and blockage ratio on the characteristics of flow field and heat transfer. The blockage ratios and Reynolds numbers were chosen between 12.5 to 50 per cent and 100≤ Re≤300, respectively. Results are presented in the form of time-averaged streamline

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Dissertations / Theses on the topic "Convective heat transfer coefficient (h)"

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Samayamantula, Sri Prithvi Samrat. "Development of a Computer Program for Transient Heat Transfer Coefficient Studies." Wright State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=wright15581072805784.

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Eferemo, Daniel. "Numerical investigation of the convective heat transfer coefficient of the human body using a representative cylindrical model." Master's thesis, University of Cape Town, 2017. http://hdl.handle.net/11427/26904.

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The principal objective of this study is to investigate, develop and verify a framework for determining the convective heat transfer co-efficient from a cylindrical model that can easily be adaptable to more complex geometry - more specifically the human body geometry. Analysis of the model under forced convection airflow conditions between the transition velocity of about 1m/s - calculated using the Reynolds number - up until 12m/s were carried out. The boundary condition, however, also included differences in turbulence intensities and cylinder orientation with respect to wind flow (seen as

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Wasson, Rachel Ann. "Separation of the Heat Transfer Components for Diffusion Flames Impinging onto Ceilings." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/50588.

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Two series of experiments were performed to determine the flow characteristics and to quantify the heat transfer components from a propane diffusion flame impinging onto a ceiling. A 0.3 m square sand burner with propane as the fuel type provided a steady-state fire. In the first series of experiments, measurements of gas temperature and velocity were made at 76 mm vertical intervals above the burner up to the ceiling. Fire heat release rates (HRRs) of 50 kW and 90 kW with free flame length to ceiling height ratios, Lf/H, of 2, 1.5, 1, 0.8, 0.85 were used to determine their effects on the m

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Lima, Carlos Umberto da Silva. "Ebulição convectiva de refrigerantes halogenados escoando no interior de tubos horizontais de cobre." Universidade de São Paulo, 2000. http://www.teses.usp.br/teses/disponiveis/18/18135/tde-11072018-120902/.

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A presente pesquisa teve por objetivo o estudo da ebulição convectiva dos novos refrigerantes halogenados no interior de tubos horizontais de cobre. Uma busca na literatura pertinente ao assunto mostrou que a determinação do coeficiente de transferência de calor pode ser determinado por correlações que, aqui, foram classificadas como: 1- Estritamente Convectivas, 2- Superposição de Efeitos e 3- Estritamente Empíricas. Essas correlações mostraram-se inadequadas a generalizações. Uma bancada experimental foi concebida e construída, o que permitiu a obtenção de dados experimentais envolvendo uma

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Gupta, Abhishek. "Experimental and theoretical analysis of single-phase convective heat transfer in channel with resistive heater and thermoelectric modules for hydronic cooling and heating device." Cincinnati, Ohio : University of Cincinnati, 2009. http://www.ohiolink.edu/etd/view.cgi?acc_num=ucin1236202446.

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Thesis (M.S.)--University of Cincinnati, 2009.<br>Advisors: Dr. Michael Kazmierczak PhD (Committee Chair), Dr. Milind A. Jog PhD (Committee Member), Dr. Sang Y. Son PhD (Committee Member). Title from electronic thesis title page (viewed April 26, 2009). Includes abstract. Keywords: Peltier cooling; developing internal turbulent forced convection; heat pump and coefficient-of-performance. Includes bibliographical references.

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Hudjetz, Stefan. "Experimental investigation of heat exchange between thermal mass and room environments." Thesis, De Montfort University, 2012. http://hdl.handle.net/2086/9021.

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The different technologies of passive cooling concepts have to rely on a good thermal coupling between a building's thermal mass and indoor air. In many cases, the ceiling is the only surface remaining for a good coupling. Further research is necessary to investigate discrepancies between existing correlations. Therefore, the overall aim of the work described in this thesis is the investigation of heat transfer at a heated ceiling in an experimental chamber. Acoustic baffles obstruct the surface of the ceiling and impede heat transfer. However, there is nearly no published data about the effec

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Zago, João Vitor. "Comportamento térmico e hidrodinâmico da ebulição convectiva do HFE-7100 em microdissipador de calor baseado em microcanais /." Ilha Solteira, 2019. http://hdl.handle.net/11449/191408.

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Orientador: Elaine Maria Cardoso<br>Resumo: Dissipadores de calor compactos, baseados em microcanais, têm se mostrado um meio eficaz para o resfriamento de dispositivos de alta densidade de energia, tais como microprocessadores, além de proporcionarem redução de material utilizado para a fabri-cação e do inventário de fluido refrigerante necessário. Sistemas bifásicos que operam com fluidos refrigerantes proporcionam coeficientes de transferência de calor elevados para baixos valores de velocidade mássica e uma distribuição de temperatura mais uni-forme na superfície. O presente estudo teve po

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Tangwongsan, Chanchana. "Measurement of in vivo endocardial and hepatic convective heat transfer coefficient." 2003. http://www.library.wisc.edu/databases/connect/dissertations.html.

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Hembram, Seeta. "Experimental Determination of Convective Heat Transfer Coefficient of Tissue Mimicking Gel." Thesis, 2013. http://ethesis.nitrkl.ac.in/4941/1/109BM0006.pdf.

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The present study deals with finding the convective heat transfer coefficient of agarose gel prepared at two different concentrations of 0.6 % w/v and 1.4% w/v. It is carried out with the help of very simple and easily available laboratory apparatus designed specifically for the determination of convective heat transfer coefficient of tissue mimicking gel. This paper demonstrates an experimental study on three reference temperatures corresponding to 60°C, 70°C and 80°C maintained in the water bath. The sample is designed in such a way that it behaves as a lumped parameter system characterized

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"Estimation of thermal properties of randomly packed bed of silicagel particles using IHTP method." Thesis, 2013. http://hdl.handle.net/10388/ETD-2013-12-1310.

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Accurate values of thermophysical transport properties of particle beds are necessary to accurately model heat and mass transfer processes in particle beds that under-go preferred processes and changes. The objective of this study is to use a proven analytical/numerical methodology to estimate the unknown transport properties within test cells filled with silicagel particles and compare the results with the previously published data. An experimental test cell was designed and constructed to carry out transient heat transfer tests for both step change conduction and convection heat transfer wi

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Books on the topic "Convective heat transfer coefficient (h)"

1

E, Poinsatte Philip, and United States. National Aeronautics and Space Administration., eds. Transient liquid-crystal technique used to produce high-resolution convective heat-transfer-coefficient maps. National Aeronautics and Space Administration, 1993.

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2

E, Poinsatte Philip, and United States. National Aeronautics and Space Administration., eds. Transient liquid-crystal technique used to produce high-resolution convective heat-transfer-coefficient maps. National Aeronautics and Space Administration, 1993.

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E, Poinsatte Philip, and United States. National Aeronautics and Space Administration., eds. Transient liquid-crystal technique used to produce high-resolution convective heat-transfer-coefficient maps. National Aeronautics and Space Administration, 1993.

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4

Cyril, Masiulaniec K., and United States. National Aeronautics and Space Administration., eds. Experimental technique and assessment for measuring the convective heat transfer coefficient from natural ice accretions. National Aeronautics and Space Administration, 1995.

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Transient liquid-crystal technique used to produce high-resolution convective heat-transfer-coefficient maps. National Aeronautics and Space Administration, 1993.

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Book chapters on the topic "Convective heat transfer coefficient (h)"

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Herwig, Heinz. "Wärmeübergangskoeffizient α* (heat transfer coefficient h*)." In Wärmeübertragung A-Z. Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-642-56940-1_83.

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Ma, Jiaxing, Yong Liu, and Mengru Ma. "A Calculation Method of Convective Heat Transfer Coefficient in Ventilation Tunnels." In Environmental Science and Engineering. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-63901-2_68.

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Brier, Steffen, Joachim Regel, and Martin Dix. "Inverse Calculation of Cryogenic Convective Heat Transfer Coefficient with Numerical Methods." In Lecture Notes in Production Engineering. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-86893-1_6.

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Smith, G. D. J., G. C. Snedden, and R. D. Stieger. "Advances in the Measurement of Convective Heat Transfer Coefficient in Gas Turbine Applications." In Energy and the Environment. Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4593-0_15.

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Mohd-Ghazali, Normah, Oh Jong-Taek, Nuyen Ba Chien, Kwang-Il Chi, Nor Atiqah Zolpakar, and Robiah Ahmad. "Multiobjective Optimization of Microchannels with Experimental Convective Heat Transfer Coefficient of Liquid Ammonia." In Modern Advances in Applied Intelligence. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-07455-9_49.

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Mowade, Sanjay, Subhash Waghmare, Sagar Shelare, and Chetan Tembhurkar. "Mathematical Model for Convective Heat Transfer Coefficient During Solar Drying Process of Green Herbs." In Advances in Intelligent Systems and Computing. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9515-5_81.

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Yuan, Leqi, Kun Cheng, Haozhi Bian, Yaping Liao, and Chenxi Jiang. "Numerical Simulation of Flow Boiling Heat Transfer in Helical Tubes Under Marine Conditions." In Springer Proceedings in Physics. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-1023-6_86.

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AbstractLead-based cooled reactors in most countries and some small reactors at sea use helical tube steam generators. Compared with U-tubes, the convection heat transfer coefficient in the spiral tube is higher, the structure is more compact, and the secondary flow is generated under the action of centrifugal force and gravity, which can achieve the effect of wetting the inner wall of the tube. However, due to the importance of the steam generator in the reactor and the complexity of the flow and boiling in the helical tube, the aggregation behavior of bubbles, the distribution of the two-pha

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Yi, J. J., J. W. Song, M. S. Yu, and H. H. Cho. "Study on convective heat transfer coefficient around a circular jet ejected into a supersonic flow." In Shock Waves. Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-85181-3_80.

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Li, Changhe. "Design and Experimental Evaluation of Convective Heat Transfer Coefficient Test System in Nanofluids Spray Cooling." In Thermodynamic Mechanism of MQL Grinding with Nano Bio-lubricant. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-6265-5_5.

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Erben, Andreas, Alexander Geist, Immanuel Voigt, et al. "Smart Pressure Film Sensor for Machine Tool Optimization and Characterization of the Dynamic Pressure Field on Machine Surfaces." In Lecture Notes in Production Engineering. Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-34486-2_14.

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AbstractKnowledge of thermal interactions with the environment is essential for improving the performance of machine tools. Therefore, it is necessary to detect and quantify the convective heat flows at machine tool surfaces, that occur in the workspace as a result of cutting fluid use or outside the machine due to active air flow. Thin-film sensors made of shape memory alloys with integrated small temperature sensors are suitable for detecting very fine pressure differences and can be used to estimate convective heat transfer. By measuring the pressure differences, the dynamic pressure field

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Conference papers on the topic "Convective heat transfer coefficient (h)"

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Jiang, Shu, and Jun Li. "Convective Heat Transfer Coefficient for Different Body Sizes: Comparison between Adult and Infant." In 16th Textile Bioengineering and Informatics Symposium. Textile Bioengineering and Informatics Society Limited (TBIS), 2023. https://doi.org/10.52202/070821-0037.

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Mele´ndez, Elva, and Rene´ Reyes. "Experimental Description of the Convective Heat Transfer Coefficient for Pool Boiling of Binary Mixtures on Porous Heating Surfaces." In ASME 2003 Heat Transfer Summer Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/ht2003-47196.

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This work presents the experimental results of the effect of porous heating surfaces, and the Marangoni effect on the convective heat transfer coefficient for pool boiling, h. The porous heating surfaces fabricated for these experiments, and the interfacial tension gradients in the binary mixtures reduced the bubbles’ size and their coalescence in the proximity of the heating surface. The convective heat transfer coefficient was calculated for the boiling of pure water and three aqueous mixtures with 12, 16, and 20% weight of ethanol on five different porous coverings on the heating element. S

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Chen, Li. "Study of Combined Method to Enhance Convective Heat Transfer." In ASME 1998 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1998. http://dx.doi.org/10.1115/imece1998-0660.

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Abstract Experimental study of convective heat transfer in a tube with the combination of spring coil and flag-type inserts was performed to investigate the characteristics of heat transfer and flow drag. The test tube was a ϕ28 × 2 × 700 mm copper tube, and the working fluid was No.30 turbine oil. A piece of spring with the length of 100mm (wire diameter of 1.5mm and the pitch of 4mm) was set at the inlet of test tube, behind the spring 1–3 pieces of trapezoid shaped flag-type inserts made of stainless steel having a sweep angle of 76° length of 20mm width of 22mm and thickness of 0.3mm were

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ZACHERL, LORENZ, ALLYSON FONTES, and FARJAD SHADMEHRI. "THREE-DIMENSIONAL HEAT TRANSFER ANALYSIS OF HOT GAS TORCH (HGT)-ASSISTED AUTOMATED FIBER PLACEMENT OF THERMOPLASTIC COMPOSITES." In Thirty-sixth Technical Conference. Destech Publications, Inc., 2021. http://dx.doi.org/10.12783/asc36/35756.

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In-situ manufacturing of thermoplastic composites using the Automated Fiber Placement (AFP) process consists of heating, consolidation, and solidification steps. During the heating step using Hot Gas Torch (HGT) as a moving heat source, the incoming tape and the substrate are heated up to a temperature above the melting point of the thermoplastic matrix. The convective heat transfer occurs between the hot gas flow and the composites in which the convective heat transfer coefficient h plays an important role in the heat transfer mechanism, which in turn significantly affects temperature distrib

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Divo, Eduardo, Alain J. Kassab, Jay S. Kapat, and Ming-King Chyu. "Retrieval of Multidimensional Heat Transfer Coefficient Distributions Using an Inverse BEM-Based Regularized Algorithm: Numerical and Experimental Results." In ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-0990.

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Abstract Surface maps of heat transfer coefficients (h) are often determined by transient liquid crystal or other similar transient experimental techniques. This involves (1) conducting an experiment with an impulsively imposed convective boundary condition on an initially isothermal test object, (2) measuring the resulting time-dependent surface temperature distributions, and (3) solving the one-dimensional transient heat conduction equation for different points on the convective surface. There are many practical cases where this approach fails to adequately model the temperature field and, c

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Davis, E. S., S. R. Duncan, and P. S. Grant. "Modeling and Validation of Substrate Heat Transfer Coefficient Distribution in Vacuum Plasma Spraying." In ITSC2006, edited by B. R. Marple, M. M. Hyland, Y. C. Lau, R. S. Lima, and J. Voyer. ASM International, 2006. http://dx.doi.org/10.31399/asm.cp.itsc2006p0317.

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Abstract As the initial step of a process control design for a substrate surface temperature control solution for Vacuum Plasma Spraying (VPS), the distribution of heat transfer coefficient h between impinging plasma gases and the substrate coating surface is required. An embedded calorimeter approach was used to measure the distribution of the convective heat transfer coefficient over the surface of a substrate and the resulting distributions have been compared with empirical correlations and CFD model predictions of the plasma jet/substrate interaction, as a function of VPS process parameter

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El-Jummah, Abubakar M., Reyad A. A. Abdul Hussain, Gordon E. Andrews, and John E. J. Staggs. "Conjugate Heat Transfer CFD Predictions of the Surface Averaged Impingement Heat Transfer Coefficients for Impingement Cooling With Backside Cross-Flow." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-63580.

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A 10 row impingement heat transfer configuration with a single sided exit at the end of the impingement gap was modelled using conjugate heat transfer CFD. The predictions were compared with experimental results for an electrically heated, 6.35mm thick, metal wall of nimonic-75, which was impingement cooled. The geometry investigated was a square array of inline impingement 10 × 10 holes with X/D of 4.66 and Z/D of 3.06, where D = 3.27mm. The use of metal walls enabled the local surface averaged heat transfer coefficient h, to be estimated from an imbedded thermocouple that logged the rate of

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Shevade, Shantanu S., Muhammad M. Rahman, and Rasim O. Guldiken. "Turbulent Multi-Jet Air Impingement for Applications in Commercial Cooking." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-88635.

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Convective heat transfer coefficient and its interdependency with various key parameters is analyzed for turbulent multi-jet impingement. Air is used as the working fluid impinging on the flat surface via a three-nozzle arrangement. A thorough investigation of velocity and temperature distribution is performed by varying Nozzle Velocity, Height over Diameter ratio (H/D) and Spacing over Diameter ratio (S/D). Convective heat transfer coefficient, average impingement surface temperature, and heat transfer rate are calculated over the impingement surface. It was found that higher S/D ratios resul

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Gnanasekaran, N., and C. Balaji. "A Correlation for Nusselt Number Under Turbulent Mixed Convection Using Transient Heat Transfer Experiments." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-22428.

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This paper reports the results of an experimental investigation of transient, turbulent mixed convection in a vertical channel in which one of the walls is heated and the other is adiabatic. The goal is to simultaneously estimate the constants in a Nusselt number correlation whose form is assumed a priori by synergistically marrying the experimental results with repeated numerical calculations that assume guess values of the constants. The convective heat transfer coefficient “h” is replaced by the Nusselt number (Nu) which is then assumed to have a form Nu = a (1+RiD) b ReDc where a, b and c

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Hu, Xuejiao, Ankur Jain, and Kenneth E. Goodson. "Investigation of the Natural Convection Boundary Condition in Microfabricated Structures." In ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems. ASMEDC, 2005. http://dx.doi.org/10.1115/ht2005-72698.

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Heat loss through surrounding air has important thermal effect on microfabricated structures. This effect is generally modeled as a natural convection boundary condition. However, how to determine the convective coefficient (h) at microscales is a debate. In this paper, a micro heater is fabricated on a suspended thin film membrane. The natural convection is investigated using the 3-omega measurements and complex analytical modeling. It is found that h seems larger than that at larger scales; however, it is also proved that the increased h is actually contributed by heat conduction instead of

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Reports on the topic "Convective heat transfer coefficient (h)"

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Kedzierski, Mark A., and Donggyu Kang. Horizontal convective boiling of R1234yf, R134a, and R450A within a micro-fin tube :. National Institute of Standards and Technology (U.S.), 2017. http://dx.doi.org/10.6028/nist.tn.1966.

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This report presents local convective boiling heat transfer and Fanning friction factor measurements in a micro-fin tube for R134a and two possible low global warming potential (GWP) refrigerant replacements for R134a: R1234yf and R450A. Test section heating was achieved with water in either counterflow or in parallel flow with the test refrigerant to provide for a range of heat fluxes for each thermodynamic quality. An existing correlation from the literature for single and multi-component mixtures was shown to not satisfactorily predict the convective boiling measurements for flow qualities

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