[논문]Effect of the vortical structure on heat transfer in the transitional flow over a backward-facing step

Xie, W.A.; Xi, G.N.; Zhong, M.B.

doi:10.1016/j.ijrefrig.2016.11.001

Effect of the vortical structure on heat transfer in the transitional flow over a backward-facing step
Effet de la structure vortique sur le transfert de chaleur dans l'écoulement transitionnel orienté vers l'arrière

International journal of refrigeration = Revbue internationale du froid, v.74, 2017년, pp.465 - 474

Xie, W.A. (School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China) , Xi, G.N. (School of Mechanical Engineering, Nantong University, Nantong 226019, China) , Zhong, M.B. (School of Energy and power Engineering, Jiangsu University, Zhenjiang 212013, China)

Abstract ▼ AI-Helper

Abstract This paper presents a direct numerical simulation of the vortical structure along the bottom wall and its effect on heat transfer enhancement in the transitional flow over a backward-facing step. The governing equations are solved with a computer program using FORTRAN code according to finite volume method. The heat transfer of the bottom wall is enhanced greatly for the transitional Reynolds numbers, especially in the range 6 ≤ x/H ≤ 14. In this range, the local Nusselt number distributions for various time instants of the periodic cycle exist three peak values at Re = 1200. The corresponding locations of Nu peak values in the vorticity contours are all between the negative vortex and the adjacent downstream positive vortex. This vortical structure appears due to the flow instability which causes the heat transfer enhancement of the bottom wall in the transitional flow. Highlights The heat transfer along the bottom wall is enhanced in the transitional flow regime. The vortical structure downstream of the reattachment region is effective on heat transfer enhancement. The relationship between the vortical structure and heat transfer enhancement is clarified.

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참고문헌 (25)

Int. Commun. Heat Mass Transf Al-aswadi 37 950 2010 10.1016/j.icheatmasstransfer.2010.06.007 Laminar forced convection flow over a backward facing step using nanofluids

상세보기
J. Fluid Mech Armaly 127 473 1983 10.1017/S0022112083002839 Experimental and theoretical investigation of backward-facing step flow

상세보기
J. Fluid Mech Barkley 473 167 2002 10.1017/S002211200200232X Three-dimensional instability in flow over a backward-facing step

상세보기
Int. J. Refrigeration Cardenas 34 113 2011 10.1016/j.ijrefrig.2010.08.010 Heat and mass transfer characteristics of a constrained thin-film ammonia-water bubble absorber

상세보기
Int. J. Refrigeration Chen 30 454 2007 10.1016/j.ijrefrig.2006.09.001 A numerical study on the heat-transfer characteristics of an array of alternating horizontal or vertical oval cross-section pipes placed in a cross stream

상세보기
Int. J. Heat Mass Transf Chen 49 3670 2006 10.1016/j.ijheatmasstransfer.2006.02.024 Turbulent separated convection flow adjacent to backward-facing step - effects of step height

상세보기
Int. J. Heat Mass Transf Iwai 43 457 2000 10.1016/S0017-9310(99)00140-4 Flow and heat transfer characteristics of backward-facing step laminar flow in a rectangular duct

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Int. J. Heat Fluid Flow Kapiris 47 101 2014 10.1016/j.ijheatfluidflow.2014.03.004 Experimental study of vortical structures in a periodically perturbed flow over a backward-facing step

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Int. J. Heat Mass Transf Kherbeet 79 858 2014 10.1016/j.ijheatmasstransfer.2014.08.074 Experimental and numerical study of nanofluid flow and heat transfer over microscale backward-facing step

상세보기
Int. J. Therm. Sci Kumar 52 176 2012 10.1016/j.ijthermalsci.2011.09.014 Effect of a circular cylinder on separated forced convection at a backward-facing step

상세보기
J. Fluid Mech Le 330 349 1997 10.1017/S0022112096003941 Direct numerical simulation of turbulent flow over a backward-facing step

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Int. J. Heat Fluid Flow Louda 43 268 2013 10.1016/j.ijheatfluidflow.2013.05.023 Numerical simulation of flows over 2D and 3D backward-facing inclined steps

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Exp. Fluids Nadge 55 1657 2014 10.1007/s00348-013-1657-5 High Reynolds number flow over a backward-facing step: structure of the mean separation bubble

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Int. J. Heat Mass Transf Nie 45 2431 2002 10.1016/S0017-9310(01)00345-3 Three-dimensional convective flow adjacent to backward-facing step - effects of step height

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Int. J. Heat Mass Transf Patankar 15 1787 1972 10.1016/0017-9310(72)90054-3 A calculation procedure for heat, mass and momentum transfer in three-dimensional parabolic flows

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Int. J. Heat Mass Transf Ram？ak 84 791 2015 10.1016/j.ijheatmasstransfer.2015.01.067 Conjugate heat transfer of backward-facing step flow: a benchmark problem revisited

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J. Fluid Mech Rani 588 43 2007 10.1017/S002211200700763X Eddy structures in a transitional backward-facing step flow

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J. Fluid Mech Schafer 623 85 2009 10.1017/S0022112008005235 The dynamics of the transitional flow over a backward-facing step

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Exp. Fluids Schram 36 233 2004 10.1007/s00348-003-0695-9 Wavelet based eddy structure eduction from a backward facing step flow investigated using particle image velocimetry

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Int. Commun. Heat Mass Transf Selimefendigil 45 111 2013 10.1016/j.icheatmasstransfer.2013.04.016 Identification of forced convection in pulsating flow at a backward facing step with a stationary cylinder subjected to nanofluid

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Int. J. Heat Mass Transf Selimefendigil 71 142 2014 10.1016/j.ijheatmasstransfer.2013.12.042 Effect of a rotating cylinder in forced convection of ferrofluid over a backward facing step

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Int. Commun. Heat Mass Transf Shahi 61 16 2015 10.1016/j.icheatmasstransfer.2014.11.005 On characteristics of a non-reacting and a reacting turbulent flow over a backward facing step (BFS)

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Appl. Math. Comput Togun 239 153 2014 10.1016/j.amc.2014.04.051 Numerical simulation of laminar to turbulent nanofluid flow and heat transfer over a backward-facing step

상세보기
Int. J. Refrigeration Wellsant 26 180 2003 10.1016/S0140-7007(02)00080-4 Heat transfer and pressure drop in a plate-type evaporator

상세보기
Int. J. Heat Fluid Flow Wua 44 155 2013 10.1016/j.ijheatfluidflow.2013.05.014 Turbulent flow over a rough backward-facing step

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Effect of the vortical structure on heat transfer in the transitional flow over a backward-facing step
Effet de la structure vortique sur le transfert de chaleur dans l'écoulement transitionnel orienté vers l'arrière

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Effect of the vortical structure on heat transfer in the transitional flow over a backward-facing step Effet de la structure vortique sur le transfert de chaleur dans l'écoulement transitionnel orienté vers l'arrière

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Effect of the vortical structure on heat transfer in the transitional flow over a backward-facing step
Effet de la structure vortique sur le transfert de chaleur dans l'écoulement transitionnel orienté vers l'arrière