International Scientific Journal


In order to improve the performance of a solar collector in low heat transfer rate zones, a 3-D numerical study of the effects of partially moving wall sections and the use of a water nanofluid (CNT) in a tilted parallelepiped solar collector was performed. Equations governing the mixed convection phenomena occurring in the cavity are developed based on the 3-D potential-vorticity formulation and solved using the finite volume method. Two cases related to the direction of the moving surfaces are considered and compared to the base case (no driven walls). The results are presented in term of flow structures, temperature fields and local and average Nusselt numbers. The Richardson number is varied from 0.001 to 10 and the CNT volume fraction from 0 to 0.045. The results showed that for low Richardson values (less than 1), the motion direction of the moving surfaces has no significant effect on heat transfer rates and becomes effective for higher values. The highest rates of heat transfer are found for high Richardson values and CNT volume fractions, while the enhancement ratio (compared to the base case) occurs for low Richardson values.
PAPER REVISED: 2022-08-14
PAPER ACCEPTED: 2022-08-25
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THERMAL SCIENCE YEAR 2022, VOLUME 26, ISSUE Issue 6, PAGES [5081 - 5094]
  1. Tiwari, R., Das, M. K., Heat transfer augmentation in a two-sided lid-driven differentially heated square cavity utilizing nanofluids, International Journal of Heat and Mass Transfer, 50 (2007), 9-10, pp. 2002-2018
  2. Chamkha, A. J., Abu-Nada, E., Mixed convection flow in single- and double-lid driven square cavities filled with water-Al2O3 nanofluid: Effect of viscosity models, European Journal of Mechanics - B/Fluids, 36 (2012), pp. 82-96
  3. Muthtamilselvan, M., Doh, D. H., Mixed convection of heat generating nanofluid in a lid-driven cavity with uniform and non-uniform heating of bottom wall, Applied Mathematical Modelling, 38 (2014), pp. 3164-3174
  4. Kareem, A., Gao, S., Computational study of unsteady mixed convection heat transfer of nanofluids in a 3D closed lid-driven cavity, International Communications in Heat and Mass Transfer, 82 (2017), pp. 125-138
  5. Kapil, M., et al., A Numerical Study of 2-D Convective Heat Transfer of Nanofluid (Al2O3/H2O) in a Lid Driven Cavity with Square Cylinder at the Centre, Materials Today: Proceedings, 11 (2019), 2, pp. 700-707
  6. Reza, A., et al., Numerical simulation of mixed convection heat transfer of nanofluid in a double lid-driven cavity using lattice Boltzmann method, Alexandria Engineering Journal, 55 (2016), 4, pp. 3101-3114
  7. Kareem, A. K., et al., Numerical investigation of mixed convection heat transfer of nanofluids in a lid-driven trapezoidal cavity, International Communications in Heat and Mass Transfer, 77 (2016), pp. 195-205
  8. Mirzakhanlari, S., et al., Increment of mixed convection heat transfer and decrement of drag coefficient in a lid-driven nanofluid-filled cavity with a conductive rotating circular cylinder at different horizontal locations: A sensitivity analysis, Powder Technology, 305 (2017), pp. 495-508
  9. Zhou, W., et al., Lattice Boltzmann simulation of mixed convection of nanofluid with different heat sources in a double lid-driven cavity, International Communications in Heat and Mass Transfer, 97 (2018), pp. 39-46
  10. Xia, S., et al., Numerical investigation of nanofluid mixed convection in a T-shaped cavity by considering a thermal barrier, Alexandria Engineering Journal, 61 (2022), 9, pp. 7393-7415
  11. Hatami, M., et al., Optimization of a lid-driven T-shaped porous cavity to improve the nanofluids mixed convection heat transfer, Journal of Molecular Liquids, Volume 231 (2017), pp. 620-63
  12. Cho, C. C., Heat transfer and entropy generation of mixed convection flow in Cu-water nanofluid-filled lid-driven cavity with wavy surface, International Journal of Heat and Mass Transfer, 119 (2018), pp. 163-174
  13. Gibanov, N. S., et al., Mixed convection with entropy generation of nanofluid in a lid-driven cavity under the effects of a heat-conducting solid wall and vertical temperature gradient, European Journal of Mechanics - B/Fluids, 70 (2018), pp. 148-159
  14. Selimefendigil, F., Mixed convection in a lid-driven cavity filled with single and multiple-walled carbon nanotubes nanofluid having an inner elliptic obstacle, Propulsion and Power Research, 8 (2019), 2, pp. 128-137
  15. Li, Z., et al., Mixed convection of non-Newtonian nanofluid in an H-shaped cavity with cooler and heater cylinders filled by a porous material: Two phase approach, Advanced Powder Technology, 30 (2019), 11, pp. 2666-2685
  16. Kavusi, H., Toghraie, D., A comprehensive study of the performance of a heat pipe by using of various nanofluids, Advanced Powder Technology, 28 (2017), 11, pp. 3074-3084
  17. Ruhani, B., et al., Statistical investigation for developing a new model for rheological behavior of Silica-ethylene glycol/Water hybrid Newtonian nanofluid using experimental data, Physica A: Statistical Mechanics and its Applications, 525 (2019), pp. 616-627
  18. Arasteh, H., et al., Heat and fluid flow analysis of metal foam embedded in a double-layered sinusoidal heat sink under local thermal non-equilibrium condition using nanofluid, Journal of Thermal Analysis and Calorimetry, 138 (2019), pp. 1461-1476
  19. Bazdar, H., et al., Numerical investigation of turbulent flow and heat transfer of nanofluid inside a wavy microchannel with different wavelengths, Journal of Thermal Analysis and Calorimetry, 139 (2020), pp. 2365-2380
  20. Shaker, B., et al., CFD analysis of Al2O3-syltherm oil Nanofluid on parabolic trough solar collector with a new flange-shaped turbulator model, Theoretical and Applied Mechanics Letters, 12 (2022), 2, 100323
  21. Sani, F. H., et al., The effect of MoS2-Ag/ H2O hybrid nanofluid on improving the performance of a solar collector by placing wavy strips in the absorber tube, Case Studies in Thermal Engineering, 30 (2022), 101760
  22. Gholinia, M., et al., Employing a new micro-spray model and (MWCNTs - SWCNTs)-H2O nanofluid on Si-IGBT power module for energy storage: A numerical simulation, Energy Reports, 7 (2021), pp. 6844-6853
  23. Ghobadi, A. H., et al., A new thermal conductivity model of CNTs/C2H6O2-H2O hybrid base nanoliquid between two stretchable rotating discs with Joule heating, International Journal of Ambient Energy, 43 (2022), pp. 3310-3321
  24. Ghobadi, A. H., Hassankolaei, M. G., A numerical approach for MHD Al2O3-TiO2/H2O hybrid nanofluids over a stretching cylinder under the impact of shape factor, Heat Transfer, 48 (2019), 8, pp. 4262-4282
  25. Aich, W., et al., Numerical simulation of buoyancy-induced heat transfer and entropy generation in 3D C-shaped cavity filled with CNT-Al2O3/water hybrid nanofluid, International Journal of Nonlinear Sciences and Numerical Simulation, (2022),
  26. Leporini, M., et al., Experimental and numerical investigation of natural convection in tilted square cavity filled with air, Experimental Thermal and Fluid Science, 99 (2018), pp. 572-583
  27. Ghasemi, K., Siavashi, M., Three-dimensional analysis of magnetohydrodynamic transverse mixed convection of nanofluid inside a lid-driven enclosure using MRT-LBM, International Journal of Mechanical Sciences, 165 (2020), 105199
  28. Ghachem, K., et al., Numerical simulation of three-dimensional double diffusive convection in a lid-driven cavity, International Journal of Thermal Sciences, 110 (2016), pp. 241-250

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