THERMAL SCIENCE

International Scientific Journal

Thermal Science - Online First

Kamel Bouaraour

,

Djemoui Lalmi

,

Sidi Mohamed Salem Mohamed

online first only

Mixed convection analysis of nanofluid flow inside an indented microchannel

ABSTRACT
The present investigation employed computational techniques to analyze the heat transfer and fluid flow properties of a Water/Cu nanofluid moving through a rectangular microchannel. The upper wall of the microchannel is thermally insulated, while the lower wall is equipped with a ribbed surface maintained at a greater temperature than the fluid entering the channel. The governing equations were discretized using the finite volume method and solved using the ANSYS-Fluent 16.0 Computational Fluid Dynamics soft-ware. The study investigated the influence of many parameters, such as the Reynolds number (20 ≤ Re ≤ 200), volume percentages of nanoparticles (1% ≤ φ ≤ 8%), and rib height. The numerical results demonstrate that when the height of the ribs rises (e = 20, e = 30, and e = 40 μm), the contact surface area between the ribs and the nanofluid similarly increases. As a result, the friction factor of the heated surface rises, regardless of whether the Reynolds numbers are low or high. Furthermore, numerical analysis suggest that the average friction factor diminishes as the Reynolds number rises for all rib heights. Ribs in the microchannel facilitate improved mixing, resulting in heightened heat transfer. The impact is intensified by augmenting the concentration of nanoparticles and the Reynolds numbers at all rib heights.
KEYWORDS
heat transfer, friction factor, nanoparticles, volume fraction
PAPER SUBMITTED: 2024-02-06
PAPER REVISED: 2024-03-04
PAPER ACCEPTED: 2024-04-15
PUBLISHED ONLINE: 2024-06-22
DOI REFERENCE: https://doi.org/10.2298/TSCI240206138B
REFERENCES
  1. Saidur, R., et al., A review on applications and challenges of nanofluids, Ren. Sust. Energy Re-views, 15 (2011), pp. 1646-1668
  2. Khanafer, K., Vafai, K., A critical synthesis of thermophysical characteristics of nanofluids, In-ternational Journal of Heat Mass Transfer, 54 (2012), pp. 4410-4442
  3. Tuckerman, D. B., Pease, R.F.W., High performance heat sinking for VLSI, IEEE Electron Device Letters, 2 (1981), 5, pp. 126-129
  4. Akbari, O. A., et al., Impact of ribs on flow parameters and laminar heat transfer of water- alu-minum oxide nanofluid with different nanoparticle volume fractions in a three-dimensional rec-tangular microchannel, Advances in Mechanical Engineering, 7 (2015), 11, pp. 1-11
  5. Alipour, H., et al., Influence of T-semi attached rib on turbulent flow and heat transfer parameters of a silver-water nanofluid with different volume fractions in a three-dimensional trapezoidal mi-crochannel, Physica E, 88 (2017), pp. 60-76
  6. Esfahani, M.A, Toghraie, D., Experimental investigation for developing a new model for the thermal conductivity of Silica/Water-Ethylene glycol (40%-60%) nanofluid at different tempera-tures and solid volume fractions, Journal of Molecular Liquids, 232 (2017), pp. 105-112
  7. Aghanajafi, A., et al., Numerical simulation of laminar forced convection of Water-CuO nanofluid inside a triangular duct, Physica E, 85 (2017), pp. 103-108
  8. Arabpour, A., et al., The study of heat transfer and laminar flow of kerosene/multi-walled carbon nanotubes (MWCNTs) nanofluid in the microchannel heat sink with slip boundary condition, journal of Thermal Analysis Calorimetry, 131 (2018), pp. 1553-1566
  9. Hadi Najafabadi, H., Keshavarz Moraveji, M., CFD investigation of local properties of Al2O3/water nanofluid in a converging microchannel under imposed pressure difference, Advanced Powder Technology, 28 (2017), 3, pp. 763-774
  10. Khodabandeh, E., et al., Numerical investigation of thermal performance augmentation of nanofluid flow in microchannel heat sinks by using of novel nozzle structure: sinusoidal cavities and rectangular ribs, Journal of the Brazilian Society of Mech. Sci. and Eng, 41 (2019), 443
  11. Mir, S., et al., A comprehensive study of two-phase flow and heat transfer of water/Ag nanofluid in an elliptical curved minichannel, Chinese Journal of Chemical Engineering, 28 (2020), pp. 383-402
  12. Gholami, M. R., et al., The effect of rib shape on the behavior of laminar flow of oil/MWCNT nanofluid in a rectangular microchannel, Journal of Thermal Analysis Calorimetry, 137 (2018), pp. 1611-1628
  13. Afrouzi, H. H., et al., Thermo-hydraulic characteristics investigation of nanofluid heat transfer in a microchannel with super hydrophobic surfaces under non-uniform magnetic field using Incom-pressible Preconditioned Lattice Boltzmann Method, Phys. A, 553 (2020), 124669
  14. Dehghani, M. S., et al., Mixed-convection nanofluid flow through a grooved channel with internal heat generating solid cylinders in the presence of an applied magnetic field, Heat Transfer Re-search, 50 (2019), 3, pp. 287-309
  15. Arasteh, H., et al., Optimal arrangements of a heat sink partially filled with multilayered porous media employing hybrid nanofluid, J. Thermal Analysis Calorimetry, 137 (2019), pp. 1045-1058
  16. Nojoomizadeh, M., et al., Investigation of permeability effect on slip velocity and temperature jump boundary conditions for FMWNT/Water nanofluid flow and heat transfer inside a micro-channel filled by a porous media, Physica E, 97 (2018), pp. 226-238
  17. Nazari, S., Toghraie, D., Numerical simulation of heat transfer and fluid flow of Water-CuO Nanofluid in a sinusoidal channel with a porous medium, Physica E, 87 (2017), pp. 134-140
  18. Rahmati, A. R., et al., Simultaneous investigations the effects of non-Newtonian nanofluid flow in different volume fractions of solid nanoparticles with slip and no-slip boundary conditions, Thermal Science and Engineering Progress, 5 (2018), pp. 263-277
  19. Barnoon, P., Toghraie, D., Numerical investigation of laminar flow and heat transfer of non-Newtonian nanofluid within a porous medium, Powder Technology, 325 (2018), pp. 78-91
  20. Syah, R., et al., Numerical investigation of nanofluid flow using CFD and fuzzy-based particle swarm optimization, Scientific Reports, 11 (2021), 20973
  21. Temiloluwa, O. S., et al., Experimental investigation of natural convection Al2O3-MWCNT/water hybrid nanofluids inside a square cavity, Experimental Heat Transfer, (2022)
  22. Moghadasi, H., et al., A computational fluid dynamics study of laminar forced convection im-provement of a non-Newtonian hybrid nanofluid within an annular pipe in porous media, Energies, 15 (2022), 8207
  23. Gravndyan, Q., et al., The effect of aspect ratios of rib on the heat transfer and laminar water/ TiO2 nanofluid flow in a two-dimensional rectangular microchannel, Journal of Molecular Liquids, 236 (2017), pp. 254-265
  24. Incropera, F.P., De Witt, D.P., Introduction to Heat Transfer, 4th edition, Wiley., New York, USA. 2002
  25. Drew, D.A., Passman, S.L., Theory of multicomponent fluids, Springer-Verlag., New York, USA, 1999
  26. Maxwell, J. C., A Treatise on Electricity and Magnetism, Unabridged., Dover, USA, 1954
  27. Patankar, S.V., Numerical Heat Transfer and Fluid Flow, Mac Graw Hill., New York, USA, 1980
  28. Aminossadati, S. M., et al., Effects of magnetic field on nanofluid forced convection in a partially heated microchannel, International Journal of Nonlinear Mechanics, 46 (2011), pp. 1373-1382
PDF VERSION [DOWNLOAD]
Mixed convection analysis of nanofluid flow inside an indented microchannel