IJCMES | The Effects of Nanofluids on Forced Convection Heat Transfer Inside Parallel Plate Heated with Flush Mounted Discrete Heater Sources

Indexing and Abstracting

The Effects of Nanofluids on Forced Convection Heat Transfer Inside Parallel Plate Heated with Flush Mounted Discrete Heater Sources

Ş. Ulaş Atmaca , İlker Göktepeli , Ali Ateş

International Journal of Civil, Mechanical and Energy Science (IJCMES), Vol-9,Issue-1, January - February 2023, Pages 1-9, 10.22161/ijcmes.9.1.1

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Article Info: Received: 16 Jan 2023; Received in revised form: 12 Feb 2023; Accepted: 21 Feb 2023; Available online: 28 Feb 2023

Abstract:

A numerical solution on forced convection of Al2O3-water nanofluid for different volume fractions is investigated for laminar flow through a parallel plate with flush mounted discrete heat sources. The model used for nanofluid mixture is a single-phase approach and fluid properties are considered constant with temperature. The finite difference method is used for solutions and four different volume fractions are considered varying from 0% to 4%. A fully developed laminar velocity profile is considered and the parallel plate is assumed as heated with three discrete heat sources flush mounted to the top and bottom plate with the same lengths. Uniform wall temperature boundary condition is taken for discrete heaters. Peclet numbers are in the range of 20-100. For comparison and validity of the solution the results for a classical problem, laminar flow through a parallel plate which is heated at the downstream region with constant temperature, are obtained. Results are presented in terms of bulk temperature, heat flux, and local Nusselt number. Heat transfer is enhanced with the particle volume concentration. For comparison, pure water results are also shown in the figures. At the locations where heat is applied the heat flux values decrease as the volume fraction increase and the bulk temperature values are higher for the higher volume fractions at the heated locations. As the volume fraction increases the local Nusselt number can increase up to 30% than to pure water.

Keywords:

forced convection, heat transfer enhancement, nanofluid, flush mounted discrete heating, parallel plate, numerical investigation.

References:

[1] R.K. Shah., and A.L. London, Laminar Flow Forced Convection In Ducts: A Source Book For Compact Heat Exchanger Analytical Data, 1978, Academic Press.
[2] T. Alves, and C.A.C Altemani, “Conjugate cooling of a discrete heater in laminar channel flow,” Journal of the Brazilian Society of Mechanical Sciences and Engineering, Vol.33 No.3, (2011), pp. 278-286. https://doi.org/10.1590/S1678-58782011000300003.
[3] Q.Wang,, and Y. Jaluria,, “Instability and heat transfer in mixed-convection flow in a horizontal ductwith discrete heat sources,” Numerical Heat Transfer, Part A, Vol.42,(2002), pp.445-463. DOI: 10.1080/10407780290059648.
[4] S. Ramadhyani, D.F. Moffatt, and F.P. Incropera, “Conjugate heat transfer from small isothermal heat sources embedded in a large substrate,” International Journal of Heat and Mass Transfer, Vol. 28, No. 10, (1985), pp. 1945-1952.
[5] R. Sugavanam, A. Ortega, A., and C.Y. Choi, “A numerical investigation of conjugate heat transfer from a flush heat source on a conductive board in laminar channel flow,” International Journal of Heat and Mass Transfer, Vol.38, No. 16,(1995), pp. 2969-2984., DOI: 10.1109/ITHERM.1994.342913.
[6] M. A. Hassab, M.K. Mansour, and M.S. Ismail, “The effect of axial wall conduction on heat transfer parameters for a parallel-plate channel having a step change in boundary conditions,” Numerical Heat Transfer, Part A: Applications, Vol.63, No.6, (2013), pp.430-451, DOI: 10.1080/10407782.2013.742764.
[7] F.P. Incropera, J.S. Kerby, D.F. Moffatt, and S. Ramadhyani, “Convection heat transfer from discrete heat sources in a rectangular channel,” International Journal of Heat and Mass Transfer, Vol. 29, No.7, (1986), pp. 1051-1058., DOI: https://doi.org/10.1016/0017-9310(86)90204-8.
[8] R. Mathews, and C. Balaji, “Numerical simulation of conjugate, turbulent mixed convection heat transfer in a vertical channel with discrete heat sources,” International Communications in Heat and Mass Transfer, Vol. 33, No.7, (2006), pp. 908-916., DOI: https://doi.org/10.1016/j.icheatmasstransfer.2006.02.013.
[9] A. Dogan, M. Sivrioglu, and S. Baskaya, “Investigations of mixed convection heat transfer in a channel with discrete heat sources at the top and at the bottom,” International Journal of Heat and Mass Transfer, Vol. 49, No.15-16 (2006), pp. 2652-2662. DOI: https://doi.org/10.1016/j.ijheatmasstransfer.2006.01.005.
[10] C. Rao, C. Balaji, and S. Vankateshan, “Effect of surface radiation on conjugate mixed convection in a vertical channel with a discrete heat source in each wall,” International Communications in Heat and Mass Transfer, Vol. 45,(2002), pp. 3331-3347.
[11] P.M. Guimarães, and G.J. Menon, “Combined free and forced convection in an inclined channel with discrete heat sources,” International Communications in Heat and Mass Transfer Vol.35, No.10, (2008) pp. 1267–1274. ,DOI: https://doi.org/10.1016/j.icheatmasstransfer.2008.08.006.
[12] M.A. Mansoura and S.E. Ahmed, “A numerical study on natural convection in porous media-filled an inclined triangular enclosure with heat sources using nanofluid in the presence of heat generation effect,” Engineering Science and Technology, an International Journal, Vol. 18, No. 3, (2015), pp. 485-495., DOI: https://doi.org/10.1016/j.jestch.2015.03.007.
[13] C.Y. Choi and A. Ortega, “Mixed convection in an inclined channel with a discrete heat source,” 1992 Proceedings, Intersociety Conference on Thermal Phenomena in Electronic Systems, (1992), pp. 40-48, DOI: 10.1109/ITHERM.1992.187739.
[14] O. Manca, S. Nardini, and D.A. Ricci, “A numerical study of nanofluid forced convection in ribbed channels,” Applied Thermal Engineering, Vol. 37,(2012),pp. 280-292., DOI:https://doi.org/10.1016/j.applthermaleng.2011.11.030[15] İ.O. Sert, N. Sezer-Uzol and S. Kakaç, “Numerical analysis of transient laminar forced convection of nanofluids in circular ducts,” Heat Mass Transfer, Vol.49, (2013), pp.1405–1417. https://doi.org/10.1007/s00231-013-1184-1
[16] S. Kakaç and A. Pramuanjaroenkij,” Review of convective heat transfer enhancement with nanofluids,” International Journal of Heat and Mass Transfer, Vol. 52, No.13–14, (2009), pp. 3187-3196., DOI:https://doi.org/10.1016/j.ijheatmasstransfer.2009.02.006.
[17] S. Kakaç and A. Pramuanjaroenkij, “Single-phase and two-phase treatments of convective heat transfer enhancement with nanofluids – A state-of-the-art review,” International Journal of Thermal Sciences, Vol.100, (2016), pp. 75-97., DOI:https://doi.org/10.1016/j.ijthermalsci.2015.09.021.
[18] A.A. Minea, “A study on Brinkman number variation on water based nanofluid heat transfer in partially heated tubes,” KONA Powder and Particle Journal No. 32 (2015)., DOI:10.1016/j.mechrescom.2016.01.013.
[19] A. Bahrami, A.H. Poshtiri, and A. M. Akbarpoor, “Nusselt number correlations for forced convection in a microchannel including discrete heat sources,” Journal of Thermophysics and Heat Transfer, (2019), pp. 1-12. https://doi.org/10.2514/1.T5814.
[20] M. Elahmer, S. Abboudi, and N. Boukadida, “Nanofluid effect on forced convective heat transfer inside a heated horizontal tube,” International Journal of Heat and Technology, Vol. 35, No. 4, (2017), pp. 874-882.
[21] D. Wen and Y. Ding, “Experimental investigation into convective heat transfer of nanofluids at the entrance region under laminar flow conditions,” Int. J. Heat Mass Transfer, Vol. 47, No.24, (2004), pp. 5181-5188., DOI: https://doi.org/10.1016/j.ijheatmasstransfer.2004.07.012.
[22] Y. Xuan and W. Roetzel, “Conceptions for heat transfer correlation of nanofluids,” Int. J. Heat Mass Transfer, Vol.43, No.19, (2000), pp. 3701-3707., DOI: https://doi.org/10.1016/S0017-9310(99)00369-5.
[23] G.K. Batchelor, “The effect of Brownian motion on the bulk stress in a suspension of spherical particles,” J. Fluid Mech., Vol. 83, No.1, (1977), pp. 97-117, DOI: https://doi.org/10.1017/S0022112077001062.
[24] Ş. Bilir, “Numerical solution of Graetz problem with axial conduction,” Numerical Heat Transfer, Part A: Applications, (1992). Vol.21, No.4, pp.493–500. DOI: https://doi.org/10.1080/10407789208944889.
[25] S. Patankar, Numerical Heat Transfer and Fluid Flow (1st ed.), (1980), CRC Press. https://doi.org/10.1201/9781482234213
[26] Y. Huang, “Entry flow and heat transfer of laminar and turbulent forced convection of nanofluids in a pipe and a channel,” Engineering and Applied Science Theses and Dissertations, (2015) No.112.
[27] P.J. Roache, “Perspective: A method for uniform reporting of grid refinement studies,” ASME. J. Fluids Eng., Vol.116, No.3, (1994), pp. 405–413.,