Academic literature on the topic 'Gnielinski'

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Journal articles on the topic "Gnielinski"

1

Erens, P. J., and A. A. Dreyer. "Heat Transfer from Immersed Slender Bodies." International Journal of Mechanical Engineering Education 23, no. 3 (1995): 203–11. http://dx.doi.org/10.1177/030641909502300304.

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This article describes a simple, low-cost experiment which could be used as a good educational example for students, combining the effects of radiation, natural convection, forced convection and condensation into one experiment. Many correlations are available for the calculation of the heat transfer from single, slender bodies (or tubes) immersed in a moving fluid. Even for a simple cylindrical tube the predicted heat transfer coefficients differ significantly from correlation to correlation. For more complex tube geometries fewer correlations could be found in the literature. The correlation
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2

Zulfattah, Z. M., S. A. Rafeq, Z. M. Shukri, et al. "Gnielinski Method in Calculating the Heat Transfer Coefficient for Metallic Solar Tower Absorber." Procedia Engineering 68 (2013): 293–98. http://dx.doi.org/10.1016/j.proeng.2013.12.182.

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3

Abedini, E., A. Behzadmehr, H. Rajabnia, SMH Sarvari, and SH Mansouri. "Experimental investigation and comparison of subcooled flow boiling of TiO2 nanofluid in a vertical and horizontal tube." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 227, no. 8 (2012): 1742–53. http://dx.doi.org/10.1177/0954406212466765.

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In this study, variations of local heat transfer coefficient are obtained in subcooled flow boiling conditions for water/TiO2 nanofluid in a vertical and horizontal tube. The results for the base fluid are compared with the predictions of the well known Shah correlation and Gnielinski formula for laminar and turbulent flows for single-phase forced convection and also with Chen correlation for subcooled flow boiling. A good agreement between the results is realized. At the subcooled regime, heat transfer coefficient of nanofluid is less than that of the base fluid and it decreases by increasing
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4

Harmen, Willy Adriansyah, Abdurrachim, and Ari Darmawan Pasek. "METODOLOGI PERHITUNGAN KOEFISIEN PERPINDAHAN PANAS KONVEKSI PAKSA FLUIDA ORGANIK PROPANA PADA KONDISI SUPERKRITIK." Jurnal Teknologi 9, no. 2 (2017): 89. http://dx.doi.org/10.24853/jurtek.9.2.89-96.

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Penelitian tentang siklus Rankine organik superkritis mulai giat dilakukan sebagai salah satu usaha untuk meningkatkan efisiensi termal dari siklus Rankine organik. Pada kondisi superkritik, sifat-sifat termodinamika dan fisika dari fluida organik berubah dengan sangat drastis disekitar titik kritisnya. Sehingga perhitungan koefisien perpindahan panas konveksi paksa tidak dapat lagi dilakukan dengan asumsi sifat-sifat fluida konstan. Dalam penelitian ini diusulkan sebuah metodologi untuk menghitung nilai koefisien perpindahan panas pada kondisi superkritis. Propana digunakan sebagai fluida org
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5

Ji, Wen-Tao, Ding-Cai Zhang, Ya-Ling He, and Wen-Quan Tao. "Prediction of fully developed turbulent heat transfer of internal helically ribbed tubes ? An extension of Gnielinski equation." International Journal of Heat and Mass Transfer 55, no. 4 (2012): 1375–84. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2011.08.028.

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6

Wang, Ning, Yu Pan, Heng Bao, and Jin Zhou. "Numerical Investigation on Supercritical Heat Transfer of RP3 Kerosene Flowing inside a Cooling Channel of Scramjet." Advances in Mechanical Engineering 6 (January 1, 2014): 213438. http://dx.doi.org/10.1155/2014/213438.

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Supercritical convective heat transfer characteristics of hydrocarbon fuel play a fundamental role in the active cooling technology of scramjet. In this paper, a 2D-axisymmetric numerical study of supercritical heat transfer of RP3 flowing inside the cooling channels of scramjet has been conducted. The main thermophysical properties of RP3, including density, specific heat, and thermal conductivity, are obtained from experimental data, while viscosity is evaluated from a commercial code with a ten-species surrogate. Effects of heat flux, mass flow rate, and inlet temperature on supercritical h
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7

Sarafraz, M. M., S. M. Peyghambarzadeh, and N. Vaeli. "Subcooled flow boiling heat transfer of ethanol aqueous solutions in vertical annulus space." Chemical Industry and Chemical Engineering Quarterly 18, no. 2 (2012): 315–27. http://dx.doi.org/10.2298/ciceq111020008s.

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The subcooled flow boiling heat-transfer characteristics of water and ethanol solutions in a vertical annulus have been investigated up to heat flux 132kW/m2. The variations in the effects of heat flux and fluid velocity, and concentration of ethanol on the observed heat-transfer coefficients over a range of ethanol concentrations implied an enhanced contribution of nucleate boiling heat transfer in flow boiling, where both forced convection and nucleate boiling heat transfer occurred. Increasing the ethanol concentration led to a significant deterioration in the observed heat-transfer coeffic
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8

Ammar, Syed Muhammad, and Chan Woo Park. "Validation of the Gnielinski correlation for evaluation of heat transfer coefficient of enhanced tubes by non-linear regression model: An experimental study of absorption refrigeration system." International Communications in Heat and Mass Transfer 118 (November 2020): 104819. http://dx.doi.org/10.1016/j.icheatmasstransfer.2020.104819.

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9

Steiner, R. "Verdampfung, Kristallisation, Trocknung. VonV. Gnielinski,A. Mersmann undF. Thurner. Friedrich Vieweg & Sohn Verlagsgesellschaft mbH, Braunschweig 1993. 259 S., mit zahlr. Abb. und Tab., DM 54,-." Chemie Ingenieur Technik 66, no. 6 (1994): 874. http://dx.doi.org/10.1002/cite.330660625.

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10

Gawande, K. R., and A. V. Deshmukh. "Experimental Investigation of Heat Transfer Rate Using Twisted Tape with Elliptical Holes." IRA-International Journal of Technology & Engineering (ISSN 2455-4480) 7, no. 2 (S) (2017): 105. http://dx.doi.org/10.21013/jte.icsesd201711.

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An experimental investigation was carried for measuring tube-side heat transfer coefficient, friction factor, heat transfer enhancement efficiency of water for turbulent flow in a circular tube fitted with rectangular-cut twisted tape insert. A copper tube of 26.6 mm internal diameter and 30 mm outer diameter and 900 mm test length was used. A stainless steel rectangular-cut twisted tape insert of 5.25 twist ratio was inserted into the smooth tube. The rectangular cut had 8 mm depth and 14 mm width. A uniform heat flux condition was created by wrapping nichrome wire around the test section and
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