Journal articles: 'Computational heat transfer'

1

Jaluria, Y., and K. E. Torrance. "Computational Heat Transfer." Journal of Pressure Vessel Technology 109, no. 2 (May 1, 1987): 262. http://dx.doi.org/10.1115/1.3264911.

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Jaluria, Yogesh, and Satya N. Atluri. "Computational heat transfer." Computational Mechanics 14, no. 5 (August 1994): 385–86. http://dx.doi.org/10.1007/bf00377593.

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3

Schmidt, F. W. "Computational heat transfer." International Journal of Heat and Fluid Flow 8, no. 4 (December 1987): 336. http://dx.doi.org/10.1016/0142-727x(87)90071-3.

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4

Sundén, Bengt. "Computational Heat Transfer in Heat Exchangers." Heat Transfer Engineering 28, no. 11 (November 2007): 895–97. http://dx.doi.org/10.1080/01457630701421661.

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5

Narayana, Vikram K., Olivier Serres, Jason Lau, Stuart Licht, and Tarek El-Ghazawi. "Towards a Computational Model for Heat Transfer in Electrolytic Cells." International Journal of Computer Theory and Engineering 6, no. 3 (2014): 215–19. http://dx.doi.org/10.7763/ijcte.2014.v6.865.

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6

Wrobel, L. C. "Computational techniques in heat transfer." Engineering Analysis 4, no. 1 (March 1987): 51–52. http://dx.doi.org/10.1016/0264-682x(87)90035-9.

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7

de Vahl Davis, Graham, and Eddie Leonardi. "Advances in Computational Heat Transfer." International Journal for Numerical Methods in Fluids 50, no. 11 (2006): 1295. http://dx.doi.org/10.1002/fld.1206.

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8

Patankar, S. V. "Recent Developments in Computational Heat Transfer." Journal of Heat Transfer 110, no. 4b (November 1, 1988): 1037–45. http://dx.doi.org/10.1115/1.3250608.

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Recent developments in computational methods for heat transfer and fluid flow are reviewed. Emphasis is given to the treatment of convection and diffusion and solution of flow equations. Also, some interesting applications of the methods are mentioned. Whereas many attractive methods have been formulated in recent years, there exists no clear consensus about a preferred method. Careful and controlled evaluations of different methods are required. This and other tasks for future research are outlined.

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I., E., Dale A. Anderson, John C. Tannehill, and Richard H. Pletcher. "Computational Fluid Mechanics and Heat Transfer." Mathematics of Computation 46, no. 174 (April 1986): 764. http://dx.doi.org/10.2307/2008017.

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10

Schmidt, Frank W. "Computational fluid mechanics and heat transfer." International Journal of Heat and Fluid Flow 7, no. 3 (September 1986): 239. http://dx.doi.org/10.1016/0142-727x(86)90028-7.

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11

Schmidt, Frank W. "Computational fluid mechanics and heat transfer." International Journal of Heat and Fluid Flow 7, no. 1 (March 1986): 27. http://dx.doi.org/10.1016/0142-727x(86)90038-x.

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12

Hanuszkiewicz-Drapała, Małgorzata, Tomasz Bury, and Katarzyna Widziewicz. "Analysis of radiative heat transfer impact in cross-flow tube and fin heat exchangers." Archives of Thermodynamics 37, no. 1 (March 1, 2016): 99–112. http://dx.doi.org/10.1515/aoter-2016-0007.

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AbstractA cross-flow, tube and fin heat exchanger of the water – air type is the subject of the analysis. The analysis had experimental and computational form and was aimed for evaluation of radiative heat transfer impact on the heat exchanger performance. The main element of the test facility was an enlarged recurrent segment of the heat exchanger under consideration. The main results of measurements are heat transfer rates, as well as temperature distributions on the surface of the first fin obtained by using the infrared camera. The experimental results have been next compared to computational ones coming from a numerical model of the test station. The model has been elaborated using computational fluid dynamics software. The computations have been accomplished for two cases: without radiative heat transfer and taking this phenomenon into account. Evaluation of the radiative heat transfer impact in considered system has been done by comparing all the received results.

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13

Anon, Upendra. "COMPUTATIONAL FLUID DYNAMICS AND HEAT TRANSFER ANALYSIS." National Journal of Environment and Scientific Research 2, no. 7 (July 22, 2021): 72. http://dx.doi.org/10.53571/njesr.2021.2.7.72-80.

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14

Wrobel, L. C., C. A. Brebbia, and A. J. Nowek. "Advanced Computational Methods in Heat Transfer III." Drying Technology 13, no. 4 (January 1995): 1043–44. http://dx.doi.org/10.1080/07373939508917006.

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15

Steckelmacher, W. "Computational heat transfer; vol. 1 mathematical modelling." Vacuum 47, no. 10 (October 1996): 1245–46. http://dx.doi.org/10.1016/0042-207x(96)80026-1.

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16

Che Sidik, Nor Azwadi, Lee Yoke Keen, and Alireza Fazeli. "Computational Investigation of Heat Transfer of Nanofluids in Domestic Water Heat Exchanger." Applied Mechanics and Materials 695 (November 2014): 423–27. http://dx.doi.org/10.4028/www.scientific.net/amm.695.423.

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Recent development of nanotechnology led to the concept of using suspended nanoparticles in the heat transfer fluids to improve the heat transfer properties of the base fluids. The heat transfer enhancement by nanofluids is the significant concerns in the efficiency of domestic water heat exchanger system. A computational investigation of the heat transfer in a domestic water heat exchanger is conducted on the water and water-based nanofluids. Copper (Cu) nanoparticle and Alumina (Al2O3) nanoparticle are selected in the water-based nanofluids. Volume fraction of nanoparticle in the nanofluids is set at 0.5 %, 1.0 %, 1.5 %, 2.0 %, 2.5 %, and 3.0 %. Heat exchanger has been invented for the heat transfer from one medium to another medium in many heat transfer systems. Domestic water heat exchanger can be used in a heat pump domestic water heating system. The density, the thermal conductivity, and the dynamic viscosity of the water base fluid are increased while the specific heat capacity of the water base fluid is reduced with the addition of copper as well as alumina nanoparticle. Addition of copper nanoparticle into the water-based heat transfer fluid significantly increases the domestic hot water temperature. The efficiency of domestic water heat exchanger system is optimum when 1.5 % copper or alumina nanoparticle is added into the water-based heat transfer fluid.

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17

Lin, Frank K. T., G. J. Hwang, S. C. Wong, and C. Y. Soong. "Numerical Computation of Turbulent Flow and Heat Transfer in a Radially Rotating Channel with Wall Conduction." International Journal of Rotating Machinery 7, no. 3 (2001): 209–22. http://dx.doi.org/10.1155/s1023621x01000197.

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This work is concerned with numerical computation of turbulent flow and heat transfer in experimental models of a radially rotating channel used for turbine blade cooling. Reynolds-averaged Navier-Stokes and energy equations with a two-layer turbulence model are employed as the computational model of the flow and temperature fields. The computations are carried out by the software package of “CFX-TASCflow”. Heat loss from the channel walls through heat conduction is considered. Results at various rotational conditions are obtained and compared with the baseline stationary cases. The influences of the channel rotation, through-flow, wall conduction and the channel extension on flow and heat transfer characteristics are explored. Comparisons of the present predictions and available experimental data are also presented.

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18

Lu, Bao Yan, and Yan Zhou Li. "Computational Fluid Dynamic of Date Transfer." Applied Mechanics and Materials 477-478 (December 2013): 236–39. http://dx.doi.org/10.4028/www.scientific.net/amm.477-478.236.

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A high-speed craft in the supersonic speed, ambient temperature and pressure would affect its structure, heat flow fluid-solid coupling simulation can quantify the effect. Due to physical fields had different heat flow fluid-solid coupling simulation, the data transmission was needed when the fluid dynamics to calculate the quantities of the import structure field. This paper given the derivation process and method of the physical fields data transfer, fluid dynamics to calculate the data in the simulation of structure field was implemented and to quantify the temperature field and stress field impacted on structure field.

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19

Hegde, N., I. Han, T. W. Lee, and R. P. Roy. "Flow and Heat Transfer in Heat Recovery Steam Generators." Journal of Energy Resources Technology 129, no. 3 (March 24, 2007): 232–42. http://dx.doi.org/10.1115/1.2751505.

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Computational simulations of flow and heat transfer in heat recovery steam generators (HRSGs) of vertical- and horizontal-tube designs are reported. The main objective of the work was to obtain simple modifications of their internal configuration that render the flow of combustion gas more spatially uniform. The computational method was validated by comparing some of the simulation results for a scaled-down laboratory model with experimental measurements in the same. Simulations were then carried out for two plant HRSGs—without and with the proposed modifications. The results show significantly more uniform combustion gas flow in the modified configurations. Heat transfer calculations were performed for one superheater section of the vertical-tube HRSG to determine the effect of the configuration modification on heat transfer from the combustion gas to the steam flowing in the superheater tubes.

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20

Sathe, S., K. M. Kelkar, K. C. Karki, C. Tai, C. Lamb, and S. V. Patankar. "Numerical Prediction of Flow and Heat Transfer in an Impingement Heat Sink." Journal of Electronic Packaging 119, no. 1 (March 1, 1997): 58–63. http://dx.doi.org/10.1115/1.2792201.

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Forced flow of air over extended surfaces offers a simple, reliable, and effective heat removal mechanism and is often employed in electronic equipment. The IBM 4381 heat sink, used in production IBM computers, utilizes this cooling technique. This heat sink consists of a ceramic substrate on which fins made of an aluminum-copper alloy are arranged in a regular array. Cooling air enters the fin array from a nozzle. Extensive experiments have been carried out to characterize the performance of this heat sink at the Advanced Thermal Engineering Laboratory at IBM Endicott. This paper presents computational analysis of the three-dimensional flow and heat transfer in this device for two different air flow rates through the nozzle. The heat dissipated by the electronic components is conducted into the fins through the ceramic base. In the present study the ceramic base is assumed to be subjected to a uniform heat flux at the bottom. The computational method incorporates a special block-correction procedure to enable iterative solution of conjugate heat transfer in the presence of large differences in thermal conductivities of the air and the fin material. The results of computations reproduce the flow pattern in the fin array that is observed experimentally. The part of the ceramic base directly below the nozzle is well cooled with the temperatures gradually increasing from the center towards the corner. The predicted pressure drop and most of the local temperatures at the base and the tip of the fins agree well with the experimental observations. This study illustrates the utility of computational flow analysis in the analysis and design of electronic cooling techniques.

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21

Leung, W. H., R. Milenkovic, and A. Class. "ICONE15-10687 A COMPUTATIONAL STUDY OF THE HEAT TRANSFER CHARACTERISTICS OF A SPIRALING COOLING PIN." Proceedings of the International Conference on Nuclear Engineering (ICONE) 2007.15 (2007): _ICONE1510. http://dx.doi.org/10.1299/jsmeicone.2007.15._icone1510_372.

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22

Ibrahim, Mounir, Pavel Sokolov, Thomas Kerslake, and Carol Tolbert. "Experimental and Computational Investigations of Phase Change Thermal Energy Storage Canisters." Journal of Solar Energy Engineering 122, no. 4 (September 1, 2000): 176–82. http://dx.doi.org/10.1115/1.1330726.

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Two sets of experimental data for cylindrical canisters with thermal energy storage applications were examined in this paper: 1) Ground Experiments and 2) Space Experiments. A 2-D computational model was developed for unsteady heat transfer (conduction and radiation) with phase-change. The radiation heat transfer employed a finite volume method. The following was found in this study: 1) Ground Experiments, the convection heat transfer is equally important to that of the radiation heat transfer; Radiation heat transfer in the liquid is found to be more significant than that in the void; Including the radiation heat transfer in the liquid resulted in lower temperatures (about 15 K) and increased the melting time (about 10 min.); Generally, most of the heat flow takes place in the radial direction. 2) Space Experiments, Radiation heat transfer in the void is found to be more significant than that in the liquid (exactly the opposite to the Ground Experiments); Accordingly, the location and size of the void affects the performance considerably; Including the radiation heat transfer in the void resulted in lower temperatures (about 40 K). [S0199-6231(00)00304-X]

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23

Manca, Oronzio, and Yogesh Jaluria. "PREFACE: ADVANCES IN COMPUTATIONAL HEAT TRANSFER (CHT-17)." Journal of Enhanced Heat Transfer 25, no. 4-5 (2018): v—vi. http://dx.doi.org/10.1615/jenhheattransf.v25.i4-5.10.

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Manca, Oronzio, and Yogesh Jaluria. "Preface: Advances in Computational Heat Transfer (CHT-17)." High Temperature Material Processes An International Quarterly of High-Technology Plasma Processes 22, no. 2-3 (2018): v—vi. http://dx.doi.org/10.1615/hightempmatproc.v22.i2-3.10.

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25

Manca, Oronzio, and Yogesh Jaluria. "PREFACE: ADVANCES IN COMPUTATIONAL HEAT TRANSFER (CHT-17)." Computational Thermal Sciences: An International Journal 11, no. 1-2 (2019): v—vi. http://dx.doi.org/10.1615/computthermalscien.v11.i1-2.10.

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26

Shang, J: S:. "Computational Fluid Dynamics and Heat Transfer; Second Edition." AIAA Journal 36, no. 4 (April 1998): 664. http://dx.doi.org/10.2514/2.423.

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27

Hawley, J. G., M. Wilson, N. A. F. Campbell, G. P. Hammond, and M. J. Leathard. "Predicting boiling heat transfer using computational fluid dynamics." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 218, no. 5 (May 2004): 509–20. http://dx.doi.org/10.1243/095440704774061165.

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28

McKenna, Timothy F., Roger Spitz, and Davor Cokljat. "Heat transfer from catalysts with computational fluid dynamics." AIChE Journal 45, no. 11 (November 1999): 2392–410. http://dx.doi.org/10.1002/aic.690451113.

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29

Florea, Gheorghe Daniel, Nicolae Ioan Vlasin, Adrian Bogdan Şimon-Marinică, Florin Manea, and Zoltan Vass. "Computational simulation of heat conduction on different surfaces." MATEC Web of Conferences 342 (2021): 01014. http://dx.doi.org/10.1051/matecconf/202134201014.

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The heat conduction from the initiation source to the adjacent surfaces, is a physical phenomenon worth considering in the process of analysing the fire. This complex phenomenon describes how the transport, the exchange, and the redistribution of the thermal energy are carried out. It is based on the theoretical knowledge that describes the initiation and fire evolution in time. The flames transfer heat from nearby surfaces through two distinct physical processes, namely convection and radiation. Another way of heat transfer is conduction, in which case the transfer of heat implies the existence of an environment that can be of a gaseous, liquid or solid nature. This paper illustrates a brief presentation of how the heat transfer is carried out, the influence of the three phenomena on the mechanism of initiation and development of the fire, and can be seen as well as a case study aimed at the computerized simulation of a fire, having as a source of initiation the radiative transfer of heat to the surrounding combustible surfaces. The ignition of the different materials in a room, due to radiation exposure emitted by an incandescent source at a certain distance from them, even without having a direct contact to the flames, is a common reality in the case of fires that occur in both residential and industrial environments. This fact justifies the importance of thermal radiation study.

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Mitchell, D. A., R. K. Cooper, and S. Raghunathan. "Effect of heat transfer on periodic transonic flows." Aeronautical Journal 103, no. 1025 (July 1999): 329–37. http://dx.doi.org/10.1017/s0001924000064708.

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Abstract The effects of the model surface to free stream adiabatic temperature ratio (Tw/Tad) on periodic transonic flow over a 14% thick biconvex aerofoil are evaluated using a computational fluid dynamic approach. The analysis is based on the thin layer Navier Stokes equations with Baldwin-Lomax turbulence model. The results of computations showed that on biconves aerofoils there is a large effect of heat transfer on instantaneous pressure distributions and periodic buffet excitation level confirming some of the available experimental data. The effects observed have an implication in wind tunnel measurement of buffet associated periodic transonic flows.

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Adil, Arjumand, Sonam Gupta, and Pradyumna Ghosh. "Numerical Prediction of Heat Transfer Characteristics of Nanofluids in a Minichannel Flow." Journal of Energy 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/307520.

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CFD simulation of the heat transfer and pressure drop characteristics of different nanofluids in a minichannel flow has been explained using FLUENT version 6.3.26. Different nanofluids with nanoparticles of Al2O3, CuO, SiO2, and TiO2have been used in the simulation process. A comparison of the experimental and computational results has been made for the heat transfer and pressure drop characteristics for the case of Al2O3-water nanofluid for the laminar flow. Also, computations have been made by considering Brownian motion as well as without considering Brownian motion of the nanoparticles. After verification of the computational model with the experimental results for Al2O3-water nanofluid, the simulations were performed for the same experimental readings for different nanofluids in the laminar flow regime to find out the heat transfer and pressure drop characteristics.

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Menni, Younes, Ali J. Chamkha, and Oluwole Daniel Makinde. "Turbulent Heat Transfer Characteristics of a W-Baffled Channel Flow - Heat Transfer Aspect." Defect and Diffusion Forum 401 (May 2020): 117–30. http://dx.doi.org/10.4028/www.scientific.net/ddf.401.117.

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In this work, the thermal behavior of a turbulent forced-convection flow of air in a rectangular cross section channel with attached W-shaped obstacles is investigated. The continuity, momentum and energy equations employed to control the heat and velocity in the computational domain. The turbulence model of k-ε is employed to simulate the turbulence effects. The finite volume method with SIMPLE algorithm is employed as the solution method. The results are reported temperature, local and average Nusselt numbers, and mean velocity contours. The subject is relevant and important for industrial applications.

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Nik Kechik Mujahidah Nik Abdul Rahman, Syamimi Saadon, and Mohd Hasrizam Che Man. "Heat Transfer Enhancement of Biomass Based Stirling Engine." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 100, no. 1 (December 6, 2022): 1–10. http://dx.doi.org/10.37934/arfmts.100.1.110.

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Stirling engine as an external combustion engine with high efficiencies and able to use any types of heat source is the best candidate to recover waste heat of the exhausted gas by converting it into power. Thus, in this study Stirling engine was introduced to evaluate the possibility of recovering waste heat from biomass to produce power. For this reason, Computational Fluid Dynamic (CFD) simulation test was performed to design an initial computational model of Stirling engine for low temperature heat waste recovery. The CFD model was validated with the experiment model and shows 6.11% of average deviation. This result proves that the computational model can be further used to evaluate the performance of Stirling engine as waste heat recovery of biomass-based industrial boilers for low-grade temperature heat source.

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Che Sidik, Nor Azwadi, N. G. Yen Cheong, and Alireza Fazeli. "Computational Analysis of Nanofluids in Vehicle Radiator." Applied Mechanics and Materials 695 (November 2014): 539–43. http://dx.doi.org/10.4028/www.scientific.net/amm.695.539.

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Nanofluids are basically nanoparticles in base fluids. Nanofluids have unique features different from conventional solid-liquid mixtures in which nanosized particles of metals and non-metals are dispersed. Due to enhancement of mechanical properties, nanofluids are widely used in heat transfer industries. Two type of base fluids which are water and 50-50 mixture of Ethylene Glycol with water (EGW) are tested. Copper (Cu) and Alumina (Al2O3) nanoparticles with volume fraction or concentration of 0.5 percent and 5 percent are examined in this study. In the recent decades, car manufacturers are exploring nanotechnology and applying onto mass production car such as Hybrid car that symbolize green products. Nanofluids in car radiator will increase heat transfer of the engine, reducing radiator size hence reducing fuel consumption and higher efficiency. On the other hand, water based nanofluids have better heat transfer compared to EGW based nanofluids. Results also show higher concentration will have better heat transfer. Thermal conductivity of nanoparticles will directly affect the thermal conductivity of the nanofluids and it is proportional related.

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35

Chen, Hung Chien, Tzu Chen Hung, and Yi Feng Chen. "Numerical Analysis of Heat Transfer in the Concentric Heat Exchanger." Applied Mechanics and Materials 275-277 (January 2013): 572–75. http://dx.doi.org/10.4028/www.scientific.net/amm.275-277.572.

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The computational fluid dynamics (CFD) software is used to compute three-dimensional concentric heat exchanger in this research. In order to reduce the burden of the computational time, the concentric heat exchanger is simplified sector of 5° for the regular arrangement of internal shape. The working fluids for hot flow and cold flow are helium and molten salt individually. The arrangements for hot and cold flow paths within a heat exchanger is opposite. This study is mainly focused on the distribution of field for the two layers of concentric heat exchanger. The width of the flow channel as well as the length, pitch, thickness and angle of fin have been changing to analyze the effectiveness-NTU method. The results showed that the best heat transfer of fin thickness, angle, space, length, and flow channel are under 5mm, 5°, 8mm, 44mm, and 12mm, respectively.

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Ning, Jinqiang, Daniel E. Sievers, Hamid Garmestani, and Steven Y. Liang. "Analytical Thermal Modeling of Metal Additive Manufacturing by Heat Sink Solution." Materials 12, no. 16 (August 12, 2019): 2568. http://dx.doi.org/10.3390/ma12162568.

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Metal additive manufacturing can produce geometrically complex parts with effective cost. The high thermal gradients due to the repeatedly rapid heat and solidification cause defects in the produced parts, such as cracks, porosity, undesired residual stress, and part distortion. Different techniques were employed for temperature investigation. Experimental measurement and finite element method-based numerical models are limited by the restricted accessibility and expensive computational cost, respectively. The available physics-based analytical model has promising short computational efficiency without resorting to finite element method or any iteration-based simulations. However, the heat transfer boundary condition cannot be considered without the involvement of finite element method or iteration-based simulations, which significantly reduces the computational efficiency, and thus the usefulness of the developed model. This work presents an explicit and closed-form solution, namely heat sink solution, to consider the heat transfer boundary condition. The heat sink solution was developed from the moving point heat source solution based on heat transfer of convection and radiation. The part boundary is mathematically discretized into many heats sinks due to the non-uniform temperature distribution, which causes non-uniform heat loss. The temperature profiles, thermal gradients, and temperature-affected material properties are calculated and presented. Good agreements were observed upon validation against experimental molten pool measurements.

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Berberović, Edin, and Siniša Bikić. "Computational Study of Flow and Heat Transfer Characteristics of EG-Si3N4 Nanofluid in Laminar Flow in a Pipe in Forced Convection Regime." Energies 13, no. 1 (December 22, 2019): 74. http://dx.doi.org/10.3390/en13010074.

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Laminar flow of ethylene glycol-based silicon nitride (EG-Si3N4) nanofluid in a smooth horizontal pipe subjected to forced heat convection with constant wall heat flux is computationally modeled and analyzed. Heat transfer is evaluated in terms of Nusselt number (Nu) and heat transfer coefficient for various volume fractions of Si3N4 nanoparticles in the base fluid and different laminar flow rates. The thermophysical properties of the EG-Si3N4 nanofluid are taken from a recently published experimental study. Computational modelling and simulation are performed using open-source software utilizing finite volume numerical methodology. The nanofluid exhibits non-Newtonian rheology and it is modelled as a homogeneous single-phase mixture, the properties of which are determined by the nanoparticle volume fraction. The existing features of the software to simulate single-phase flow are extended by implementing the energy transport coupled to the fluid flow and the interaction of the fluid flow with the surrounding pipe wall via the applied wall heat flux. In addition, the functional dependencies of the thermophysical properties of the nanofluid on the volume fraction of nanoparticles are implemented in the software, while the non-Newtonian rheological behavior of the nanofluid under consideration is also taken into account. The obtained results from the numerical simulations show very good predicting capabilities of the implemented computational model for the laminar flow coupled to the forced convection heat transfer. Moreover, the analysis of the computational results for the nanofluid reflects the increase of heat transfer of the EG-Si3N4 nanofluid in comparison to the EG for all the considered nanoparticle volume fractions and flow rates, indicating promising features of this nanofluid in heat transfer applications.

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Gorla, Rama Subba Reddy, and Nagasekhar Reddy Gorla. "Probabilistic Finite Element Analysis in Heat Transfer." International Journal for Computational Methods in Engineering Science and Mechanics 6, no. 2 (September 3, 2005): 77–83. http://dx.doi.org/10.1080/15502280590891555.

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39

Song, Hyemin, Younghyeon Kim, Dongjin Yu, Byoung Jae Kim, Hyunjin Ji, and Sangseok Yu. "A Computational Analysis of a Methanol Steam Reformer Using Phase Change Heat Transfer." Energies 13, no. 17 (August 21, 2020): 4324. http://dx.doi.org/10.3390/en13174324.

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A methanol steam reformer converts methanol and steam into a hydrogen-rich mixture through an endothermic reaction. The methanol reformer is divided into a reaction section and a heat supply section that transfers thermal energy from 200 to 300 °C. This study presents the behavior of the methanol steam reforming reaction using the latent heat of the steam. A numerical analysis was separately conducted for two different regimes assuming constant heat flux conditions. A methanol steam reformer is an annulus structure that has a phase change heat transfer from an outer tube to an inner tube. Different from the steam zone temperature in the tube, the latent heat of steam condensation decreases, and there is a gradual between-wall temperature decrease along the longitudinal direction. Since the latent heat of steam condensation is very sensitive to the requested heat from the reformer, it is necessary to consider a refined design of a methanol reformer to obtain a large enough amount of heat by steam condensation.

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Wrobel, Luiz C., Maciej K. Ginalski, Andrzej J. Nowak, Derek B. Ingham, and Anna M. Fic. "An overview of recent applications of computational modelling in neonatology." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 368, no. 1920 (June 13, 2010): 2817–34. http://dx.doi.org/10.1098/rsta.2010.0052.

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This paper reviews some of our recent applications of computational fluid dynamics (CFD) to model heat and mass transfer problems in neonatology and investigates the major heat and mass-transfer mechanisms taking place in medical devices, such as incubators, radiant warmers and oxygen hoods. It is shown that CFD simulations are very flexible tools that can take into account all modes of heat transfer in assisting neonatal care and improving the design of medical devices.

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Chen, J. X., X. Gan, and J. M. Owen. "Heat Transfer in an Air-Cooled Rotor–Stator System." Journal of Turbomachinery 118, no. 3 (July 1, 1996): 444–51. http://dx.doi.org/10.1115/1.2836686.

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This paper describes a combined experimental and computational study of the heat transfer from an electrically heated disk rotating close to an unheated stator. A radial outflow of cooling air was used to remove heat from the disk, and local Nusselt numbers were measured, using fluxmeters at seven radial locations, for nondimensional flow rates up to Cw = 9680 and rotational Reynolds numbers up to Reφ = 1.2 × 106 Computations were carried out using an elliptic solver with a low-Reynolds-number k–ε turbulence model, and the agreement between the measured and computed velocities and Nusselt numbers was mainly good.

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Zhou, Hua Xiang, Zheng Zhou, and Jing Ping Liu. "Theoretical and Computational Research of Heat Radiant Transfer in Cylinder." Applied Mechanics and Materials 628 (September 2014): 311–16. http://dx.doi.org/10.4028/www.scientific.net/amm.628.311.

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In order to obtain the radiation heat transfer theory and calculation methods, the movement of the gas particles, location, intensity, temperature, are researched in cylinder under different conditions with combustion system and the mode of heat transfer. Under high temperature conditions in the cylinder, the gas radiation heat transfer is researched in the complex heat transfer theory. A statistical correlation K narrow band model, a mean absorption coefficient, a gas line databases, by-line calculation method are found, through research and analysis emissivity, transmittance, absorption coefficient, typical models, mathematical equations, database, calculation methods. Examine the distribution performance of each database for different media concentration and temperature, a statistical narrow-band band parametric model accuracy is tested, using statistical narrow band model, the results of the use of by-line method. Research shows: selected spectral database, calculation method has a greater impact on the results. The research also shows the result coincides calculations based by-line HITEWP2010 database method, whether radiant heat or wall flux, statistical narrow band model. These are supplied to the internal combustion engine cylinder design.

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Ilic, Milica, Milan Petrovic, and Vladimir Stevanovic. "Boiling heat transfer modelling: A review and future prospectus." Thermal Science 23, no. 1 (2019): 87–107. http://dx.doi.org/10.2298/tsci180725249i.

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This paper reviews the current status of boiling heat transfer modelling, discusses the need for its improvement due to unresolved intriguing experimental findings and emergence of novel technical applications and outlines the directions for an advanced modelling approach. The state-of-the-art of computational boiling heat transfer studies is given for: macro-scale boiling models applied in two-fluid liquid-vapour interpenetrating media approach, micro-, meso-scale boiling computations by interface capturing methods, and nano-scale boiling simulations by molecular dynamics tools. Advantages, limitations and shortcomings of each approach, which originate from its grounding formulations, are discussed and illustrated on results obtained by the boiling model developed in our research group. Based on these issues, we stress the importance of adaptation of a multi-scale approach for development of an advanced boiling predictive methodology. A general road-map is outlined for achieving this challenging goal, which should include: improvement of existing methods for computation of boiling on different scales and development of conceptually new algorithms for linking of individual scale methods. As dramatically different time steps of integration for different boiling scales hinder the application of full multi-scale methodology on boiling problems of practical significance, we emphasise the importance of development of another algorithm for the determination of sub-domains within a macro-scale boiling region, which are relevant for conductance of small-scale simulations.

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Singh, Jashanpreet, and Chanpreet Singh. "Computational analysis of convective heat transfer across a vertical tube." FME Transactions 49, no. 4 (2021): 932–40. http://dx.doi.org/10.5937/fme2104932s.

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This paper deals with the numerical investigation of the convective mode of heat transfer across a vertical tube. Experiments were carried out using air as a fluid in a closed room by achieving a steady-state condition. Implicit scheme of finite difference method was adopted to numerically simulate the free convection phenomenon across vertical tube using LINUX based UBUNTU package. Numerical data were collected in the form of velocity, temperature profiles, boundary layer thickness, Nusselt number (Nu), Rayleigh's number (Ra), and heat transfer coefficient. The results of the Nusselt number showed a good agreement with the previous studies. Results data of heat transfer coefficient indicate that there were some minor heat losses due to radiation of brass tube and curvature of the tube.

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S N, Sharath Kumar, Sathish S, and Purushothama H R. "Heat Transfer Analysis of Plate Fin Heat Sink with Dimples and Protrusions: Investigation of New Designs." International Journal of Heat and Technology 39, no. 6 (December 31, 2021): 1861–70. http://dx.doi.org/10.18280/ijht.390621.

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Numerous works have been carried out in the design and analysis of Heat Sink, however hardly any work have been reported with studies on dimples and protrusions being added to the heat sink geometries. This paper aims to find the worthiness for addition of dimples and protrusions to the common plate fin heat sink geometries for heat transfer enhancement. Analysis was carried out in forced convention environment for 9 different velocities computationally for 12 heat sink geometries at constant heat flux boundary condition applied to base of heat sink. Decrease in base temperature and thermal resistance of heat sink was considered as the performance factors. Further these computational results were validated experimentally. The results obtained from computational analysis were in good agreement with experimental results. The research outcome show that addition of dimples has proved its worthiness at slightly higher velocity regime with thermal performance being increased for a dimpled heat sink as compared to non-dimpled heat sink. Therefore, currently developed dimpled heat sinks can be a potential model that can be used in forced convection environment for better thermal performance and economy.

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Gong, Wen Bang, Li Liang Chen, and Jing Hao. "Derivation and Application for Time Step Model in Simulation of Solidification Process." Materials Science Forum 575-578 (April 2008): 14–21. http://dx.doi.org/10.4028/www.scientific.net/msf.575-578.14.

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The heat transfer during the casting solidification process includes: the heat radiation of the high temperature casting and the mold, the heat convection between the casting and the mold, and the heat conduction in the casting and the casting to the mold. In this paper, a formula of time step in simulation of solidification is derived, considering the heat radiation, convection and conduction based on the conservation of energy. The different heat transfer condition between the ordinary sand casting and the permanent mold casting is taken into account in this formula. The characteristic of heat transfer in the interior and surface of the casting is also considered. The numerical experiments show that this formula can avoid radiation of the computation, and can improve the computational efficiency about 20% in the simulation of solidification process.

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Walter, Christian, Sebastian Martens, Christian Zander, Carsten Mehring, and Ulrich Nieken. "Heat Transfer through Wire Cloth Micro Heat Exchanger." Energies 13, no. 14 (July 10, 2020): 3567. http://dx.doi.org/10.3390/en13143567.

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The main objective of this study is to calculate and determine design parameters for a novel wire cloth micro heat exchanger. Wire cloth micro heat exchangers offer a range of promising applications in the chemical industry, plastics technology, the recycling industry and energy technology. We derived correlations to calculate the heat transfer rate, pressure drop and temperature distributions through the woven structure in order to design wire cloth heat exchangers for different applications. Computational Fluid Dynamics (CFD) simulations have been carried out to determine correlations for the dimensionless Euler and Nusselt numbers. Based on these correlations, we have developed a simplified model in which the correlations can be used to calculate temperature distributions and heat exchanger performance. This allows a wire cloth micro heat exchanger to be virtually designed for different applications.

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Theofanous, T. G. "A COMPUTATIONAL PLATFORM FOR MULTIPHASE FLOW AND HEAT TRANSFER." Multiphase Science and Technology 15, no. 1-4 (2003): 177–80. http://dx.doi.org/10.1615/multscientechn.v15.i1-4.150.

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Drikakis, Dimitris, and Nikolaos Asproulis. "Multi‐scale computational modelling of flow and heat transfer." International Journal of Numerical Methods for Heat & Fluid Flow 20, no. 5 (June 15, 2010): 517–28. http://dx.doi.org/10.1108/09615531011048222.

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Salcudean, Martha. "COMPUTATIONAL FLUID FLOW AND HEAT TRANSFER – AN ENGINEERING TOOL." Transactions of the Canadian Society for Mechanical Engineering 15, no. 2 (June 1991): 125–35. http://dx.doi.org/10.1139/tcsme-1991-0007.

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The purpose, method and potential of computational fluid dynamics are discussed. Examples of CFD and heat transfer applications to engineering problems are described. Some limitations related to discretization, convergence rate and turbulence modelling are illustrated through examples, and possible remedies arc discussed.

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Journal articles on the topic 'Computational heat transfer'

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