Numerical Investigation of Fin Position Effect on the Forced Convection Heat Transfer Inside a Channel in Turbulent Flow

Document Type : Research Article

Authors

1 Department od mechanical engineering, pardis branch, islamic azad university

2 mechanical engineering, pardis branch, islamic azad university

Abstract

The using of fins for convection heat transfer enhancement is one of the effective approaches of heat transfer enhancement in a 2 dimensional channels. In this investigation, five different geometries for fins have been considered; numerical results were presented for fluid flow variables and heat transfer. For this purpose, governing equations of fluid flow and heat transfer were discretized with finite volume method; also for linking of velocity and pressure of fluid flow, SIMPLE algorithm was employed. Turbulent flow modelling was applied by turbulent model. Sensitivity of numerical results from computational grid and validation of numerical results were provided in compare of experimental and other numerical investigation. Then, geometries were investigated for fins include of triangle with different angle, trapezoidal and square. For these geometries, numerical results for velocity vector, pressure drop and temperature of fluid have been presented. Finally, heat transfer results were studied with regards to Nusselt number. Triangle fin with angle of 60 degrees respect to angle of 90 degrees has more Nusselt number and trapezoidal fin has much Nusselt number among five studied fins. From the investigation of the heat transfer to pressure drop ratio, it was observed that the trapezoidal fins have the best performance.

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References

[1] F. Owliaei, N. Aminizadeh, M.A. Afrooz, Numerical study of the effects of channel’s inclination on flow irreversibility in natural and forced convection flows, in: Electronic Conference on New Researches in Science and Technology, 2014. (In Persian)
[2] F. Owliaei, N. Aminizadeh, M.A. Afrooz, Analysis of the 2nd Law of Thermodynamics in Natural and forced convection flow in an inclined channel having sudden expansion and contraction,in:1st National Conference of Fluid Flow and Heat and Mass Transfer, Esfahan, 2014. (In Persian)
[3] S. Sotoudehnia, N. Aminizadeh, M.A. Afrooz, Numerical simulation of laminar forced convection flow and entropy analysis in an inclined channel using blocked off method, in: 2nd International Conference on new findings in engineering and basic Science, 2014. (In Persian)
[4] S.Sotoudehnia,N.Aminizadeh, M.A.Afrooz,Numerical study of laminar forced convection flow and irreversibility analysis in a channel having 2 sudden expansions – blocked off method, in: 1st National Conference of Fluid Flow and Heat and Mass Transfer, Esfahan, 2014. (In Persian)
[5] S.Sotoudehnia,N.Aminizadeh, M.A. Afrooz, Application of blocked off method in simulation of laminar forced convection and analysis of the 2nd law of thermodynamics in a channel having variable cross section, in: 1st National Conference of Fluid Flow and Heat and Mass Transfer, Esfahan, 2014. (In Persian)
[6] G.Shahdadnezhad,O.Tabari,A.Bahrami,Energy loss analysis of a laminar forced convection flow in a channel having an inclined step,in:2nd National Conference on Mechanical Systems and Industrial Innovations, Ahvaz, 2013. (In Persian)
[7] M. Shirzad, M.A. Afrooz, Numerical analysis of magnetohydrodynamic forced convection flow in a 3D channel having a step, in: 2nd International Conference on New Research Findings in Mechanics, Industry, and Aerospace, Tehran, 2016. (In Persian)
[8] P. Safaei, A.K. Mobarakeh, M.H. Navdfar, Free convection in an inclined square channel having  internal insulated cavities, in: 19th Annual Mechanical Engineering Conference, Birjand, 2011. (In Persian)
[9] M.Foruzan-Nia,S.A.G. Nassab, S.B. Maisam Atash Afrooz, Numerical study of entropy generation in a turbulent forced convection flow in a channel havingtwo inclinedbackwardand forward step, in:22ndAnnualMe chanicalEngineeringConference,Ahvaz,2014.(InPersian)
[10] F.K. Marvasti, A. Tahavvor, Numerical Analysis of Natural Convection Heat Transfer Enhancement in a Channel with Inclined Parallel Plates, in: 1st International Conference of Applied Research in Electrical and Mechanical Engineering, Malek-Ashtar University of Technology, Tehran, 2015. (In Persian)
[11] S.mehdipour,H. Shokouhmand, M. Nikian, A. Abed, Experimental investigation of hybrid heat transfer in a cylindrical inclined channel filled with a porous media, in: National Mechanical Engineering Conference, Shiraz, 2013. (In Persian)
[12]  M. Hedayati, A.A. Dehghan, Numerical study of flow patterns of natural convection in solar collectors casing having flat and corrugated collectors,in:12th FluidDyna miConferenc,Tehran,2009.(InPersian)
[13]  E. Ayli, O. Bayer, S. Aradag, Experimental investigation and CFD analysis of rectangular profile fINS in a square channel for forced convection regimes, International Journal of Thermal Sciences,109 (2016) 279-290.
[14]  A.Boonloi, Numerical investigation on turbulent forced convection and heat transfer characteristic in a square Channel with discrete combined V-baffle and V-orifice, Case Studies in Thermal Engineering,8 (2016) 226–235.
[15]   A. Dixit, A. Patil, Heat transfer characteristics of grooved fin under forced convection ,Heat Transfer Engineering,36(16)(2015)1409–1416.
[16]  M.-H. Yang, R.-H. Yeh, J.-J. Hwang, Forced convective heat transfer in a channel with staggered fin array,Journal of Thermophysics and Heat Transfer, 25(2) (2011) 272- 281.
[17]   J. Yang, M. Zeng, Q. Wang, Forced convection heat transfe enhancement by porous pin fins in rectangular channels, Journal of Heat Transfer, 132(5) (2010)0517 02.
[18]   M.-H.Yang,R.-H.Yeh,J.J.Hwang,Forced convection in a channel with transverse fins, international Journal of Numerical,Methods forHeat& Fluid Flow, 22(3) (2012) 306-322.
[19]  G. Tanda, R. Abram, Forced convection heat transfer in channels with rib turbulators inclined at 45 deg, Journal of Turbomachinery, 131(2) (2009)12-21.
[20]   B.A.K. Abu-Hijleh, Fin placement for optimal forced convection heat transfer from a cylinder in cross-flow, International Journal of Numerical Methods for Heat & Fluid, 15(3) (2005) 277-295.
 [21]S.M.Seyyedi, D.D.Ganji,M.Gorji, H. Bararnia, S. Soleimani, Forced convection heat transfer due to different inclination angles of splitter behind square cylinder,AppliedMathematicsandMechanics,34(5)2013.
[22]A.D. Rayeni, S.A.G. Nassab, Analysis of combined radiation and forced convection heat transfer in 3D laminar flow over an inclined forward facing step, Journal of Electronics Cooling and Thermal Control, 06(01) (2016) 1-18.
[23]T. Crittenden, S. Jha, A. Glezer, Forced convection heat transfer enhancement  in  heat  sink  channels  using aeroelastically fluttering reeds, Thermal and Thermomechanical Phenomena in Electronic Systems (ITherm), (2017).
[24]      M. Cucchi, D. Fustinoni, P. Gramazio, L.P.M. Colombo, A. Niro, Heat transfer characteristics in forced convection through a rectangular channel with 60° tilted staggered ribs,Journal of Physics: Conference Series(2014).
[25]K. Amghar, M.A. Louhibi, N. Salhi, M. Salhi, Numerical simulation of forced convection turbulent in a channel with transverse baffles, JMES, 8(4) (2017) 1417-1427.
[26]N.A.C. Sidik, M. Khakbaz, L. Jahanshaloo, SyahrullailSamion, A.N. Darus, Simulation of forced convection in a channel with nanofluid by the lattice boltzmann method, Nanoscale Res Lett, (2013).
[27]H.-C. Shin, S. Han, S.-M. Kim, Numerical study on the forced convection heat transfer of nanofluids in micro- channels, Journal of Nanoscience and Nanotechnology, 17(11) (2017)8394-8403 .
[28]S. Acharya, Periodically developed flow and heat transfer in a ribbed duct, int. J. Heat and Mass Transfer 36(8) (1993) 2069-2082.
Amirkabir Journal of Mechanical Engineering
Volume 52, Issue 6
September 2020
Pages 1627-1640

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