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Journal articles on the topic 'Flow and heat transfer'

Author: Grafiati

Published: 6 September 2023

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1

Gorin, Alexander V. "HEAT TRANSFER IN TURBULENT SEPARATED FLOWS(Flow around Cylinder 1)." Proceedings of the International Conference on Jets, Wakes and Separated Flows (ICJWSF) 2005 (2005): 445–50. http://dx.doi.org/10.1299/jsmeicjwsf.2005.445.

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2

Ryspekova, A., Zh Bolatov, and S. Kunakov. "Heat transfer of the uranium sphere in laminar cooling flow." International Journal of Mathematics and Physics 6, no. 1 (2015): 45–47. http://dx.doi.org/10.26577/2218-7987-2015-6-1-45-47.

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3

Nakamura, Hirokazu, and Toshihiko Shakouchi. "Flow and Heat Transfer Characteristics of High Temperature Gas-Particle Air Jet Flow(Multiphase Flow 2)." Proceedings of the International Conference on Jets, Wakes and Separated Flows (ICJWSF) 2005 (2005): 319–24. http://dx.doi.org/10.1299/jsmeicjwsf.2005.319.

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4

Hosoi, Hideaki, Naoyuki Ishida, Naohisa Watahiki, and Kazuaki Kitou. "ICONE23-1630 HEAT TRANSFER TESTS FOR PASSIVE WATER-COOLING SYSTEM : (2) STEAM FLOW DISTRIBUTION AND HEAT TRANSFER IN TUBE BUNDLE." Proceedings of the International Conference on Nuclear Engineering (ICONE) 2015.23 (2015): _ICONE23–1—_ICONE23–1. http://dx.doi.org/10.1299/jsmeicone.2015.23._icone23-1_305.

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5

Coulson, J. M., J. F. Richardson, J. R. Backhurst, and J. H. Harker. "Fluid flow, heat transfer and mass transfer." Filtration & Separation 33, no. 2 (February 1996): 102. http://dx.doi.org/10.1016/s0015-1882(96)90353-5.

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6

Avramenko, A. A., M. M. Kovetskaya, E. A. Kondratieva, and T. V. Sorokina. "HEAT TRANSFER IN GRADIENT TURBULENT BOUNDARY LAYER." Thermophysics and Thermal Power Engineering 41, no. 4 (December 22, 2019): 19–26. http://dx.doi.org/10.31472/ttpe.4.2019.3.

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Effect of pressure gradient on heat transfer in turbulent boundary layer is constantly investigated during creation and improvement of heat exchange equipment for energy, aerospace, chemical and biological systems. The paper deals with problem of steady flow and heat transfer in turbulent boundary layer with variable pressure in longitudinal direction. The mathematical model is presented and the analytical solution of heat transfer in the turbulent boundary layer problem at positive and negative pressure gradients is given. Dependences for temperature profiles and coefficient of heat transfer on flow parameters were obtained. At negative longitudinal pressure gradient (flow acceleration) heat transfer coefficient can both increase and decrease. At beginning of acceleration zone, when laminarization effects are negligible, heat transfer coefficient increases. Then, as the flow laminarization increases, heat transfer coefficient decreases. This is caused by flow of turbulent energy transfers to accelerating flow. In case of positive longitudinal pressure gradient, temperature profile gradient near wall decreases. It is because of decreasing velocity gradient before zone of possible boundary layer separation.

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7

Ohtake, Hiroyasu, Yasuo Koizumi, and Norihumi Higono. "ICONE15-10655 ANALYTICAL STUDY ON BOILING HEAT TRANSFER OF SUBCOOLED FLOW UNDER OSCILLATORY FLOW CONDITIONS." Proceedings of the International Conference on Nuclear Engineering (ICONE) 2007.15 (2007): _ICONE1510. http://dx.doi.org/10.1299/jsmeicone.2007.15._icone1510_358.

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8

Babus'Haq, Ramiz, and S. Douglas Probert. "Heat transfer in turbulent flow." Applied Energy 40, no. 1 (January 1991): 81–82. http://dx.doi.org/10.1016/0306-2619(91)90054-2.

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9

Corzo, Santiago Francisco, Damian Enrique Ramajo, and Norberto Marcelo Nigro. "High-Rayleigh heat transfer flow." International Journal of Numerical Methods for Heat & Fluid Flow 27, no. 9 (September 4, 2017): 1928–54. http://dx.doi.org/10.1108/hff-05-2016-0176.

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Purpose The purpose of this paper is to assess the Boussinesq approach for a wide range of Ra (10 × 6 to 10 × 11) in two-dimensional (square cavity) and three-dimensional (cubic cavity) problems for air- and liquid-filled domains. Design/methodology/approach The thermal behavior in “differentially heated cavities” filled with air (low and medium Rayleigh) and water (high Rayleigh) is solved using computational fluid dynamics (CFDs) (OpenFOAM) with a non-compressible (Boussinesq) and compressible approach (real water properties from the IAPWS database). Findings The results from the wide range of Rayleigh numbers allowed for the establishment of the limitation of the Boussinesq approach in problems where the fluid has significant density changes within the operation temperature range and especially when the dependence of density with temperature is not linear. For these cases, the symmetry behavior predicted by Boussinesq is far from the compressible results, thus inducing a transient heat imbalance and leading to a higher mean temperature. Research limitations/implications The main limitation of the present research can be found in the shortage of experimental data for very high Rayleigh problems. Practical implications Practical implications of the current research could be use of the Boussinesq approach by carefully observing its limitations, especially for sensible problems such as the study of pressure vessels, nuclear reactors, etc. Originality/value The originality of this paper lies in addressing the limitations of the Boussinesq approach for high Rayleigh water systems. This fluid is commonly used in numerous industrial equipment. This work presents valuable conclusions about the limitations of the currently used models to carry out industrial simulations.

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10

Asianuaba, Ifeoma B. "Heat Transfer Augmentation." European Journal of Engineering Research and Science 5, no. 4 (April 25, 2020): 475–78. http://dx.doi.org/10.24018/ejers.2020.5.4.1869.

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This article presents a brief review of various methodologies applied for heat transfer enhancement in laminar flow convection regime. Experimental setup for laminar flow convection heat transfer enhancement using insertions has been explained along with the associated results. Nusselt’s number is found to be a key parameter for investigatigation in order to perceive the enhancement in heat transfer. Similarly, the magnetohydrodynamic mixed convection heat transfer enhancement technique has also been explored. The results of isotherms and fluid flow parameters are discussed which directly affect the heat transfer coefficient. This review article complements the literature in related field and thus will be helpful in order to carry out further experiments in heat transfer enhancement in future.

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11

Asianuaba, Ifeoma B. "Heat Transfer Augmentation." European Journal of Engineering and Technology Research 5, no. 4 (April 25, 2020): 475–78. http://dx.doi.org/10.24018/ejeng.2020.5.4.1869.

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This article presents a brief review of various methodologies applied for heat transfer enhancement in laminar flow convection regime. Experimental setup for laminar flow convection heat transfer enhancement using insertions has been explained along with the associated results. Nusselt’s number is found to be a key parameter for investigatigation in order to perceive the enhancement in heat transfer. Similarly, the magnetohydrodynamic mixed convection heat transfer enhancement technique has also been explored. The results of isotherms and fluid flow parameters are discussed which directly affect the heat transfer coefficient. This review article complements the literature in related field and thus will be helpful in order to carry out further experiments in heat transfer enhancement in future.

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12

KIMURA, Fumiyoshi, and Kenzo KITAMURA. "A304 FLUID FLOW AND HEAT TRANSFER OF NATURAL CONVECTION ADJACENT TO UPWARD-FACING, INCLINED, HEATED PLATE : AIR CASE(Heat Transfer-1)." Proceedings of the International Conference on Power Engineering (ICOPE) 2009.3 (2009): _3–19_—_3–24_. http://dx.doi.org/10.1299/jsmeicope.2009.3._3-19_.

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13

Srisailam, B., K. Sreeram Reddy, G. Narender, and Bala Siddulu Malga. "Flow and Heat Transfer Analysis MHD Nanofluid due to Convective Stretching Sheet." Indian Journal Of Science And Technology 15, no. 44 (November 28, 2022): 2393–402. http://dx.doi.org/10.17485/ijst/v15i44.1006.

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14

Yue, Qingwen, Xide Lai, Xiaoming Chen, and Ping Hu. "Study on heat transfer characteristics of flow heat coupling of horizontal spiral tube heat exchanger." Thermal Science and Engineering 4, no. 2 (September 10, 2021): 23. http://dx.doi.org/10.24294/tse.v4i2.1516.

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In view of the complex structural characteristics and special operating environment of the horizontal spiral tube heat exchanger of the shaft sealed nuclear main pump, the numerical simulation method of flow heat coupling is used to analyze the influence of the flow and temperature changes of the fluid on the shell side on the flow field and temperature field of the heat exchanger, explore the influence rules of the inlet parameters on the flow and heat transfer characteristics of the fluid in the heat exchanger, and analyze the enhanced heat transfer performance of the heat exchanger by using the relevant heat transfer criteria. The results show that the horizontal spiral tube fluid generates centrifugal force under the influence of curvature, forming a secondary flow which is different from the straight tube flow heat transfer, and the velocity distribution is concave arc, which will enhance the heat transfer efficiency of the heat exchanger; with the increase of shell side velocity, the degree of fluid disturbance and turbulence increases, while the pressure loss does not change significantly, and the heat transfer performance of the heat exchanger increases; under the given structure and size, the heat transfer performance curve of the heat exchanger shows that the increase of shell side flow and Reynolds number has a significant impact on the enhanced heat transfer of the spiral tube. In practical engineering applications, the heat transfer can be strengthened by appropriately increasing the shell side flow of the heat exchanger.

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15

Rao, H. V. "Isentropic recuperative heat exchanger with regenerative work transfer." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 214, no. 4 (April 1, 2000): 609–18. http://dx.doi.org/10.1243/0954406001523948.

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A counter-flow heat exchanger is considered to be the ideal method for recuperative heat transfer between hot and cold fluid streams. In this paper the concept of an isentropic heat exchanger with regenerative work transfer is developed. The overall effect is a mutual heat transfer between the two fluid streams without any net external heat or work transfers. The effectiveness for an isentropic heat exchanger with regenerative work transfer is derived for the case of fluid streams with constant specific heats and it is shown that it is greater than unity. The ‘isentropic effectiveness’ of a heat exchanger is defined. The relationship between the entropy generation and effectiveness for the traditional heat exchanger is also examined and compared with that of the isentropic heat exchanger. The practical realization of isentropic operation of a heat exchanger and its possible application are briefly considered.

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16

Zinurov, Vadim E., Andrey V. Dmitriev, Ilnar I. Sharipov, and Alsu R. Galimova. "EXPERIMENTAL STUDY OF HEAT EXCHANGE FROM A STEAM-GAS MIXTURE DURING HEAT TRANSFER THROUGH A RIBBED SURFACE." Tyumen State University Herald. Physical and Mathematical Modeling. Oil, Gas, Energy 7, no. 2 (2021): 60–74. http://dx.doi.org/10.21684/2411-7978-2021-7-2-60-74.

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This article deals with the problem of heat energy transfer from a steam-gas mixture with a constant temperature of 220 °C. An experimental study of the transfer of heat energy from a steam-gas mixture by a recuperative heat exchanger with a ribbed surface at the industrial enterprise “PULP Invest”, located at the production site of the industrial park Technopolis “Khimgrad” in Kazan, is presented. The design of a heat exchanger with a ribbed surface is described. The finned surface of the recuperative heat exchanger allowed intensifying the transfer of heat flow, due to the appearance of turbulent vortices of the vapor-gas medium when it moves between the transversely arranged fins. For a heated heat carrier, water was used, which in the future is planned to be used for technological and economic needs. This paper presents the experimental method and measuring instruments. During the experiments, the initial temperature of the cold coolant (water) varied from 28.8 to 31.9 °C. The series of experiments included 7 experiments with a different volume flow of water from 60 to 120 liters/hour. The initial volume flow rate was 60 l/h, the flow rate change step was 10 l/h. The results of the studies showed that the time of the output of the studied parameters: temperature head, heat flow and heat transfer coefficient to the stationary mode was 265 s. When entering the stationary mode with a volume flow rate of cold coolant in the range from 60 to 120 l/h, the temperature head varied from 32.2 to 63 °C, the heat flow varied from 4.1 to 4.5 kW, the heat transfer coefficient varied in the range of 24.4-27.9 W/(m2 · K). The obtained results allowed establishing that the heat transfer coefficient is inversely proportional to the thermal resistance of the vapor-gas phase.

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17

Liu, Dong, and Suresh V. Garimella. "Flow Boiling Heat Transfer in Microchannels." Journal of Heat Transfer 129, no. 10 (December 14, 2006): 1321–32. http://dx.doi.org/10.1115/1.2754944.

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Flow boiling heat transfer to water in microchannels is experimentally investigated. The dimensions of the microchannels considered are 275×636 and 406×1063μm2. The experiments are conducted at inlet water temperatures in the range of 67–95°C and mass fluxes of 221–1283kg∕m2s. The maximum heat flux investigated in the tests is 129W∕cm2 and the maximum exit quality is 0.2. Convective boiling heat transfer coefficients are measured and compared to predictions from existing correlations for larger channels. While an existing correlation was found to provide satisfactory prediction of the heat transfer coefficient in subcooled boiling in microchannels, saturated boiling was not well predicted by the correlations for macrochannels. A new superposition model is developed to correlate the heat transfer data in the saturated boiling regime in microchannel flows. In this model, specific features of flow boiling in microchannels are incorporated while deriving analytical solutions for the convection enhancement factor and nucleate boiling suppression factor. Good agreement with the experimental measurements indicates that this model is suitable for use in analyzing boiling heat transfer in microchannel flows.

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18

Gan Jia Gui, Nicolette, Cameron Stanley, Nam-Trung Nguyen, and Gary Rosengarten. "Ferrofluidic plug flow heat transfer enhancement." International Journal of Computational Methods and Experimental Measurements 6, no. 2 (November 1, 2017): 291–302. http://dx.doi.org/10.2495/cmem-v6-n2-291-302.

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19

Suman, Balram, and Raffaele Savino. "Capillary Flow-Driven Heat Transfer Enhancement." Journal of Thermophysics and Heat Transfer 25, no. 4 (October 2011): 553–60. http://dx.doi.org/10.2514/1.t3747.

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20

Inaba, Takehiko, and Tadanobu Kubo. "Enhanced Heat Transfer through Oscillatory Flow." Transactions of the Japan Society of Mechanical Engineers Series B 59, no. 563 (1993): 2265–70. http://dx.doi.org/10.1299/kikaib.59.2265.

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21

Makinde, O. D., R. J. Moitsheki, R. N. Jana, B. H. Bradshaw-Hajek, and W. A. Khan. "Nonlinear Fluid Flow and Heat Transfer." Advances in Mathematical Physics 2014 (2014): 1–2. http://dx.doi.org/10.1155/2014/719102.

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22

RILEY, N. "HEAT TRANSFER IN JEFFERY-HAMEL FLOW." Quarterly Journal of Mechanics and Applied Mathematics 42, no. 2 (1989): 203–11. http://dx.doi.org/10.1093/qjmam/42.2.203.

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23

Beguier, C., and P. Fraunie. "Double wake flow with heat transfer." International Journal of Heat and Mass Transfer 34, no. 4-5 (April 1991): 973–82. http://dx.doi.org/10.1016/0017-9310(91)90008-3.

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24

Biswas, G., P. K. Nag, and A. S. Gupta. "Heat transfer in a corner flow." Wärme- und Stoffübertragung 21, no. 1 (January 1987): 13–14. http://dx.doi.org/10.1007/bf01008212.

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25

OTA, Terukazu. "Heat Transfer Control in Separated Flow." Journal of the Society of Mechanical Engineers 93, no. 864 (1990): 912–13. http://dx.doi.org/10.1299/jsmemag.93.864_912.

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26

HAYASHI, Yujiro. "Heat Transfer Control in Combined Flow." Journal of the Society of Mechanical Engineers 93, no. 864 (1990): 914–15. http://dx.doi.org/10.1299/jsmemag.93.864_914.

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27

Chayut, Nuntadusit, and Wae-hayee Makatar. "1073 FLOW AND HEAT TRANSFER CHARACTERISTICS OF ROW OF JET IMPINGEMENTS FROM ELONGATED ORIFICES UNDER CROSS-FLOW." Proceedings of the International Conference on Jets, Wakes and Separated Flows (ICJWSF) 2013.4 (2013): _1073–1_—_1073–6_. http://dx.doi.org/10.1299/jsmeicjwsf.2013.4._1073-1_.

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28

Higono, Norihumi, Hiroyasu Ohtake, and Yasuo Koizumi. "ICONE15-10821 EXPERIMENTAL STUDY ON BOILING HEAT TRANSFER OF SUBCOOLED FLOW UNDER OSCILLATORY FLOW AND VIBRATION CONDITION." Proceedings of the International Conference on Nuclear Engineering (ICONE) 2007.15 (2007): _ICONE1510. http://dx.doi.org/10.1299/jsmeicone.2007.15._icone1510_422.

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29

Li, Guo Neng. "Numerical Simulation of Characteristics of Cross-Flow Heat Transfer in Pulsating Flow." Advanced Materials Research 187 (February 2011): 242–46. http://dx.doi.org/10.4028/www.scientific.net/amr.187.242.

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In order to investigate the characteristics of heat transfer in oscillating flow, the computational fluid dynamics method was employed to study the effects of pulsating flow on the heat transfer process in a cross-flow heat exchange pipe, and to analyze the underling mechanism which controls the improvement of heat transfer in pulsating flow through the distribution of temperature. Several pulsating frequencies (f=0, 5, 10, 50, 100, 150 Hz) and a wide range of pulsating amplitudes (inlet velocity u=2.0+Asin(2πft) m/s, A=0, 2, 5, 10, 15, 20 m/s) were explored to find out the best pulsating parameters for heat transfer. Results showed that pulsating flow with a low pulsating frequency (the magnitude of ~101 Hz) should be selected to obtain large heat transfer coefficient, and that pulsating flow with larger pulsating amplitude results in greater heat transfer coefficient. On the other hand, results revealed that only a limited length of the cross-flow exchange pipe was affected by the pulsating flow compared to the whole length, and that the affected length is longer with lower pulsating frequency and larger pulsating amplitude.

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30

Gu, Xin, Yong Qing Wang, Qi Wu Dong, and Min Shan Liu. "Research on Heat Transfer Enhancement of Shutter Baffle Heat Exchanger." Advanced Materials Research 236-238 (May 2011): 1607–13. http://dx.doi.org/10.4028/www.scientific.net/amr.236-238.1607.

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A new concept of “Sideling Flow” in shell side of shell-and-tube heat exchanger is presented, which is relative to the cross flow, longitudinal flow and helical flow in heat exchanger. A type of new energy saving shell-and-tube heat exchanger with sideling flow in shell side, shutter baffle heat exchanger is invented, which exhibits the significant heat transfer enhancement and flow resistance reducement performance. The “Field Synergy Principle” is adopted to analyze the heat transfer enhancement mechanism of sideling flow, it is indicated that the shutter baffle heat exchanger exhibits the perfect cooperativity between velocity field and temperature grads field. Effects of the structure and processing parameters on the fluid flow and heat transfer are also investigated through numerical simulation, both the correlative equations of heat transfer coefficient and pressure drop in shell side are deduced, which provide references for the design and popularization of this new type heat exchanger.

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31

Rajavel, Rangasamy, and Kaliannagounder Saravanan. "Heat transfer studies on spiral plate heat exchanger." Thermal Science 12, no. 3 (2008): 85–90. http://dx.doi.org/10.2298/tsci0803085r.

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In this paper, the heat transfer coefficients in a spiral plate heat exchanger are investigated. The test section consists of a plate of width 0.3150 m, thickness 0.001 m and mean hydraulic diameter of 0.01 m. The mass flow rate of hot water (hot fluid) is varying from 0.5 to 0.8 kg/s and the mass flow rate of cold water (cold fluid) varies from 0.4 to 0.7 kg/s. Experiments have been conducted by varying the mass flow rate, temperature, and pressure of cold fluid, keeping the mass flow rate of hot fluid constant. The effects of relevant parameters on spiral plate heat exchanger are investigated. The data obtained from the experimental study are compared with the theoretical data. Besides, a new correlation for the Nusselt number which can be used for practical applications is proposed.

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32

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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33

Markatos, N. C. "Heat transfer." International Journal of Heat and Mass Transfer 33, no. 5 (May 1990): 1039–40. http://dx.doi.org/10.1016/0017-9310(90)90088-c.

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34

Owen, J. M. "Heat transfer." International Journal of Heat and Mass Transfer 28, no. 1 (January 1985): 315–16. http://dx.doi.org/10.1016/0017-9310(85)90036-5.

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35

Fried, E. "Heat transfer." International Journal of Heat and Fluid Flow 6, no. 1 (March 1985): 15. http://dx.doi.org/10.1016/0142-727x(85)90025-6.

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36

Bunphet, Bongkot, Akihisa Toyoda, and Kouichi Kamiuto. "F214 Radial-Flow Forced-convection Heat Transfer in Narrow Open-Cellular Porous Channels." Proceedings of the Thermal Engineering Conference 2007 (2007): 367–68. http://dx.doi.org/10.1299/jsmeted.2007.367.

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37

Cheng, Ping, Hui-Ying Wu, and Fang-Jun Hong. "Phase-Change Heat Transfer in Microsystems." Journal of Heat Transfer 129, no. 2 (September 20, 2006): 101–8. http://dx.doi.org/10.1115/1.2410008.

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Recent work on miscroscale phase-change heat transfer, including flow boiling and flow condensation in microchannnels (with applications to microchannel heat sinks and microheat exchangers) as well as bubble growth and collapse on microheaters under pulse heating (with applications to micropumps and thermal inkjet printerheads), is reviewed. It has been found that isolated bubbles, confined elongated bubbles, annular flow, and mist flow can exist in microchannels during flow boiling. Stable and unstable flow boiling modes may occur in microchannels, depending on the heat to mass flux ratio and inlet subcooling of the liquid. Heat transfer and pressure drop data in flow boiling in microchannels are shown to deviate greatly from correlations for flow boiling in macrochannels. For flow condensation in microchannels, mist flow, annular flow, injection flow, plug-slug flow, and bubbly flows can exist in the microchannels, depending on mass flux and quality. Effects of the dimensionless condensation heat flux and the Reynolds number of saturated steam on transition from annular two-phase flow to slug/plug flow during condensation in microchannels are discussed. Heat transfer and pressured drop data in condensation flow in microchannels, at low mass flux are shown to be higher and lower than those predicted by correlations for condensation flow in macrochannels, respectively. Effects of pulse heating width and heater size on microbubble growth and collapse and its nucleation temperature on a microheater under pulse heating are summarized.

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38

Wahid, Syed M. S. "Numerical analysis of heat flow in contact heat transfer." International Journal of Heat and Mass Transfer 46, no. 24 (November 2003): 4751–54. http://dx.doi.org/10.1016/s0017-9310(03)00320-x.

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39

Sayed Ahmed, Sayed Ahmed E., Osama M. Mesalhy, and Mohamed A. Abdelatief. "Flow and heat transfer enhancement in tube heat exchangers." Heat and Mass Transfer 51, no. 11 (August 30, 2015): 1607–30. http://dx.doi.org/10.1007/s00231-015-1669-1.

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40

Bohojło-Wiśniewska, Aneta. "Numerical Modelling Of Humid Air Flow Around A Porous Body." Acta Mechanica et Automatica 9, no. 3 (September 1, 2015): 161–66. http://dx.doi.org/10.1515/ama-2015-0027.

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Summary This paper presents an example of humid air flow around a single head of Chinese cabbage under conditions of complex heat transfer. This kind of numerical simulation allows us to create a heat and humidity transfer model between the Chinese cabbage and the flowing humid air. The calculations utilize the heat transfer model in porous medium, which includes the temperature difference between the solid (vegetable tissue) and fluid (air) phases of the porous medium. Modelling and calculations were performed in ANSYS Fluent 14.5 software.

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41

Xi, Mengmeng, Yingwei Wu, Wenxi Tian, Guanghui Su, and Suizheng Qiu. "ICONE23-1570 THE FLOW AND HEAT TRANSFER CHARACTERISTICS OF A PASSIVE RESIDUAL HEAT REMOVAL SYSTEM UNDER OCEAN CONDITIONS." Proceedings of the International Conference on Nuclear Engineering (ICONE) 2015.23 (2015): _ICONE23–1—_ICONE23–1. http://dx.doi.org/10.1299/jsmeicone.2015.23._icone23-1_266.

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42

Zhou, Guo Fa, and Ting Peng. "Heat Transfer Enhancement of Viscoelastic Fluid in the Rectangle Microchannel with Constant Heat Fluxes." Applied Mechanics and Materials 117-119 (October 2011): 574–81. http://dx.doi.org/10.4028/www.scientific.net/amm.117-119.574.

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It has been found that viscoelastic fluid has evident heat transfer enhancement function in macro scale. But in micro scale, viscoelastic fluid’s flow and heat transfer characteristics are still unknown. In this paper, the heat transfer process of viscoelastic fluid in the microchannel is studied by numerical simulation method. The simulation results show that the maximum heat transfer enhancement of viscoelastic fluid is up to 800%, compared with pure viscous fluid. The viscoelastic fluid has such obvious heat transfer enhancement function because of its strong secondary flow. Laminar sub-layer can be damaged by the strong secondary flow, and thus radial flow generates in laminar sub-layer. The radial flow can increase the interference and mixing effect, and enhances fluid’s turbulence and convection which can enhance heat transfer as a result. So the heat transfer enhancement depends on the intensity of secondary flow which is caused by the second normal stress difference, and it will increase with the raise of the flow rate.

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43

Sharma, Mukesh Kumar, Choudhary Manjeet, and Oluwole Daniel Makinde. "Flow and Heat Transfer in Nanofluid Flow through a Cylinder Filled with Foam Porous Medium under Radial Injection." Defect and Diffusion Forum 387 (September 2018): 166–81. http://dx.doi.org/10.4028/www.scientific.net/ddf.387.166.

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The Darcy flow and heat convection in nanofluid through a cylinder filled with a foam porous medium subject to local non-thermal equilibrium (LNTE) condition and uniform radial injection on the outer wall of the cylinder is studied. The momentum and two-energy equations are solved by differential transformation method (DTM) in the form of stream function using similarity variables. The effect on flow and heat transfer of different types of nanofluids and involved physical parameters Prandtl number Pr, Reylond number Re, Darcy number Da, Biot number Bi, Ratio of thermal conductivities Rk, porosity parameter ε, solid volume fraction parameter φ and shape of nanoparticles are analyzed through graphs. The viscous drag force and heat convection at the wall of the cylinder is calculated in terms of non-dimensional skin-friction coefficient and Nusselt number respectively. Decreasing the porosity of foam porous medium causes increment in magnitude of heat transfer rate for both the phases. Spherical shape of nanoparticles transfers more heat in comparison of cylindrical shape nanoparticles. Amongst the nanofluid H2O-Ag, H2O-Cu and H2O-Al2O3 the magnitude of heat transfer for fluid phase Nuf is lowest for nanofluid H2O-Al2O3.

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44

GYOUTOKU, Toshiki, Koutaro TSUBAKI, and Akio MIYARA. "414 Flow and heat transfer characteristics of heat transfer fluid in vertical ground heat exchanger." Proceedings of the Symposium on Environmental Engineering 2013.23 (2013): 312–13. http://dx.doi.org/10.1299/jsmeenv.2013.23.312.

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Yang, Hai Jiang, Ming Li, Xiao Ye Xue, Yan Liu, and Kui Huang. "Characteristic Analysis of the Influence of Flow Rate Distribution in Each Flat Tube of Parallel Flow Heat Exchanger to Heat Transfer." Advanced Materials Research 1008-1009 (August 2014): 927–33. http://dx.doi.org/10.4028/www.scientific.net/amr.1008-1009.927.

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In this paper, the heat transfer rate of parallel flow heat exchanger was obtained in the condition of non-uniform flow distribution by 3D numerical simulation. The maximum theoretical heat transfer rate of parallel flow heat exchanger was obtained through 1D calculation. Ultimately, the correlation of the influence of non-uniform flow distribution on heat transfer efficiency was obtained by the comparative analysis of non-uniform flow distribution and heat transfer efficiency and regression calculation. It was found that the forecasted heat transfer efficiency error of correlation was within 2%.

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Jing, Qi, and QingGuo Luo. "Experimental study on the correlation of subcooled boiling flow in horizontal tubes." Thermal Science, no. 00 (2020): 339. http://dx.doi.org/10.2298/tsci200801339j.

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Subcooled boiling is the most effective form of heat exchange in the water jacket of the cylinder head. Chen's model is the most widely used correlation for predicting boiling heat transfer, but the selection of the correlation for the nucleate boiling is controversial. The work of this paper is to simulate the heat transfer process in the water jacket of the cylinder head with a horizontal rectangular channel that is heated on one side. Using the coolant flow velocity, inlet temperature and system pressure as variables, the heat flux and heat transfer coefficient were obtained. The results show that the increase of the coolant flow velocity can effectively promote the convection heat transfer, and the change of inlet temperature and system pressure will affect the occurrence of nucleate boiling. However, the Chen?s model predictions doesn?t fit well with the experimental data. Four nucleate boiling correlations were selected to replace Chen's model nucleate boiling correlation. The correlation proposed by Pioro coincides best with the experimental data. The mean error after correction is 18.2%.

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Guo, Lei, Shusheng Zhang, and Jing Hu. "Flow boiling heat transfer characteristics of two-phase flow in microchannels." AIP Advances 12, no. 5 (May 1, 2022): 055219. http://dx.doi.org/10.1063/5.0095786.

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A set of experimental platforms with widths of 0.5, 1.0, 1.5, and 2.0 mm was established to explore the mechanism of flow boiling bubble dynamics in microchannels, focusing on heat transfer characteristics, pressure loss, and two-phase flow pattern identification. Bubble flow, restricted bubble flow, and dry area were observed in all four channels. The appearance of flow pattern was related to flow rate and channel width. Under the condition of the same channel width, the initial heat flux of subcooled boiling gradually increased with increase in flow rate, and this change trend was close to the linear trend. Under the same flow rate, the initial heat flux of subcooled boiling increased with decrease in channel width. This condition was due to the faster flow rate of the working medium in the narrow channel, resulting in decrease of heating time. The increase in bubble generation frequency directly led to the increase in the wall heat transfer coefficient and the decrease in the bubble separation diameter. Mathematical analysis showed that under the condition of small flow, reduction of channel size led to reduction of the total wall heat transfer coefficient. In this condition, reduction of channel size cannot enhance heat transfer. With increasing volume flow rate, the range of hydrodynamic control area increased and the index decreased. When the flow rate was large, the total heat transfer coefficient increased greatly with the decrease in channel size. The theoretical values were in good agreement with the experimental data.

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Leung, Sharon S. Y., Raghvendra Gupta, David F. Fletcher, and Brian S. Haynes. "Effect of Flow Characteristics on Taylor Flow Heat Transfer." Industrial & Engineering Chemistry Research 51, no. 4 (July 20, 2011): 2010–20. http://dx.doi.org/10.1021/ie200610k.

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A, Zeeshan. "Flow Analysis and Heat Transfer of Nanofluid Flow in Different Geometries: A Review with Focus on Recent Development." Petroleum & Petrochemical Engineering Journal 5, no. 1 (2021): 1–22. http://dx.doi.org/10.23880/ppej-16000245.

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In a thermo-dynamical system loss of energy takes the centre of attention. Laws of thermodynamics stated that energies of the system cannot be lost, but this energy could be engaged to perform useful work, or wastefully lost in form of rises in temperature of the system. It is eminent to control the factors which act in rising values of loss in energy. Nanofluids uses nanosized particles with very high thermal conductivity uniformly distributed in base fluids which increases the conductivity of the base fluid ridiculously. Nanofluid play a vital role in reducing the loss of energy and improve heat conduction. An effort has been made in this paper is to carry out an extensive review of the literature regarding Nanofluid in recent years. Some basic components and properties of nanofluids are deeply elaborated in this article. Preparation of nanofluids perform a very significant role in recent decades. The new advanced results in nanofluids helps the reader to clarify their concepts are argued using two major dynamical models.

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Cheong, Wong Kok, and Fashli Nazhirin bin Ahmad Muezzin. "Heat Transfer of a Double Layer Microchannel Heat Sink." Applied Mechanics and Materials 479-480 (December 2013): 411–15. http://dx.doi.org/10.4028/www.scientific.net/amm.479-480.411.

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A numerical study is conducted to predict the effects of physical parameters of a double layer microchannel heat sink on heat transfer. The physical parameters investigated are the channel height and channel width for different flow orientation at the upper and lower channels. For the range of Reynolds number investigated, results show that parallel flow configuration leads to better heat transfer performance than counter flow. Lower thermal resistance can be achieved in a double-layered microchannel heat sink with higher channel height and lower channel width.

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