Geodesic
Experimental and numerical study of free convection heat transfer around the junction of circular cylinder and heated vertical plate
Žurnal Sibirskogo federalʹnogo universiteta. Matematika i fizika, Tome 13 (2020) no. 5, pp. 631-643.

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The present study investigates the effects of a circular cylinder on the three-dimensional characteristics of free convective heat transfer. The circular cylinder is mounted horizontally on a heated vertical plate and is categorized as high aspect ratio obstacle, which means the height of cylinder is comparable to its diameter. The obtained results are provided for the laminar flow regime. In addition, during numerical study the governing differential equations are solved around the Grashof number equals to $3\times10^8$. In order to illustrated the regions of high gradients of temperature, the flow temperature is shown in terms of non-dimensional contours and diagrams. At the near junction region in upstream of cylinder, by description of heat transfer coefficients represented to the temperature gradients at intended points, the effects of cylinder emplacement on the heat transfer rate is surveyed. As expected, the value of the buoyancy-induced heat transfer coefficient increases at the cylinder junction in the upstream side. The maximum value of heat transfer coefficient is seen at the symmetry plane of study domain, which is corresponded to the location of horseshoe vortex system core. Finally, by deviation calculating between numerical and experimental results also by analysis of the experimental method uncertainty the validity and reliability of numerical and experimental approaches are proved.
Keywords: juncture flow, free convection heat transfer, laminar boundary layer
Mots-clés : heat transfer coefficient. 
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Hamid Malah; Yurii S. Chumakov. Experimental and numerical study of free convection heat transfer around the junction of circular cylinder and heated vertical plate. Žurnal Sibirskogo federalʹnogo universiteta. Matematika i fizika, Tome 13 (2020) no. 5, pp. 631-643. http://geodesic.mathdoc.fr/item/JSFU_2020_13_5_a10/

[1] R.L. Simpson, “Junction flows”, Annu. Rev. Fluid Mech., 33 (2001), 415–443 | DOI | Zbl

[2] Y.S. Chumakov, A.M. Levchenya, H. Malah, “The vortex structure formation around a circular cylinder placed on a vertical heated plate”, J. Phys. Math.: St. Petersburg State Polytechnical University, 11:1 (2018), 56–66 | DOI

[3] H. Bhowmik, A. Faisal, A. Al-Yaarubi, N. Al-Alawi, “Analyses of Natural Convection Heat Transfer from a Heated Cylinder Mounted in Vertical Duct”, International Journal of Mechanical and Mechatronics Engineering, 12:3 (2018), 213–218

[4] M. El-Amrani, M. Seaid, “Numerical simulation of natural and mixed convection flows by Galerkin-characteristic method”, Int. J. Numer. Meth. Fluids, 53 (2007), 1819–1845 | DOI | MR | Zbl

[5] S.M. Elsherbiny, M.A. Teamah, A.R. Moussa, “Natural convection heat transfer from an isothermal horizontal square cylinder”, Alexandria Engineering Journal, 56 (2017), 181–187 | DOI

[6] C.E. Clifford, M.L. Kimber, “Optimizing laminar natural convection for a heat generating cylinder in a channel”, Journal of Heat Transfer, 136 (2014), 112502 | DOI

[7] T.J. Praisner, C.R. Smith, “The dynamics of the horseshoe vortex and associated endwall heat transfer-Part I: Temporal behavior”, Journal of Turbomachinery, 128 (2006), 747–754 | DOI

[8] G. Polidori, J. Padet, Journal of Flow Visualization $\$ Image Processing, 10:1 (2003), 13–26 | DOI

[9] ANSYS Academic Research Mechanical, Release 16.2, Help System, Fluent Theory Guide, ANSYS, Inc, 2015

[10] S.B. Koleshko, Y.S. Chumakov, “Turbulent natural-convection heat transfer on a vertical surface under stepwise heating with inversion of heat flux”, High Temp., 48 (2010), 397–401 (in Russian) | DOI

[11] D.M. Christopher, B.X. Wang, “Natural convection around a horizontal cylinder in a fluid-saturated porous media using Fourier series”, Transactions on Engineering Sciences, 5 (1994), 4–11

[12] H. Malah, Y.S. Chumakov, A.M. Levchenya, “A study of the vortex structures around circular cylinder mounted on vertical heated plate”, AIP Conference Proceedings, 1959, no. 1 (2018), 050018 | DOI

[13] S.O. Atayilmaz, “Experimental and numerical study of natural convection heat transfer from horizontal concentric cylinders”, International Journal of Thermal Sciences, 50 (2011), 1472–1483 | DOI