Natural Convection and Entropy Generation of MgO/Water Nanofluids in the Enclosure under a Magnetic Field and Radiation Effects
Tóm tắt
The authors of the present paper sought to conduct a numerical study on the convection heat transfer, along with the radiation and entropy generation (EGE) of a nanofluids (NFs) in a two and three-dimensional square enclosure, by using the FVM. The enclosure contained a high-temperature blade in the form of a vertical elliptical quadrant in the lower corner of the enclosure. The right edge of the enclosure was kept at low temperature, while the other edges were insulated. The enclosure was subjected to a magnetic field (MGF) and could be adjusted to different angles. In this research, two laboratory relationships dependent on temperature and volume fraction were used to simulate thermal conductivity and viscosity. The variables of this problem were Ra, Ha, RAP, nanoparticle (NP) volume fraction, blade aspect ratio, enclosure angles, and MGF. Evaluating the effects of these variables on heat transfer rate (HTR), EGE, and Be revealed that increasing the Ra and reducing the Ha could increase the HTR and EGE. On the other hand, adding radiation HTR to the enclosure increased the overall HTR. Moreover, an augmentation of the volume fraction of magnesium oxide NPs led to an increased amount of HTR and EGE. Furthermore, any changes to the MGF and the enclosure angle imposed various effects on the HTR. The results indicated that an augmentation of the size of the blade increased and then decreased the HTR and the generated entropy. Finally, increasing the blade always increased the Be.
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Tài liệu tham khảo
Ahmadi, 2020, Comparing various machine learning approaches in modeling the dynamic viscosity of CuO/water nanofluid, J. Therm. Anal. Calorim., 139, 2585, 10.1007/s10973-019-08762-z
Aghakhani, 2018, Numerical investigation of heat transfer in a power-law non-Newtonian fluid in a C-Shaped cavity with magnetic field effect using finite difference lattice Boltzmann method, Comput. Fluids, 176, 51, 10.1016/j.compfluid.2018.09.012
Li, 2020, Pool boiling heat transfer to CuO-H2O nanofluid on finned surfaces, Int. J. Heat Mass Transf., 156, 119780, 10.1016/j.ijheatmasstransfer.2020.119780
Bahiraei, 2019, Efficacy of a hybrid nanofluid in a new microchannel heat sink equipped with both secondary channels and ribs, J. Mol. Liq., 273, 88, 10.1016/j.molliq.2018.10.003
Shadloo, M.S. (2020). Application of support vector machines for accurate prediction of convection heat transfer coefficient of nanofluids through circular pipes. Int. J. Numer. Methods Heat Fluid Flow.
Ahmadi, A.A., Arabbeiki, M., Ali, H.M., Goodarzi, M., and Safaei, M.R. (2020). Configuration and Optimization of a Minichannel Using Water–Alumina Nanofluid by Non-Dominated Sorting Genetic Algorithm and Response Surface Method. Nanomaterials, 10.
Shadloo, 2019, Numerical simulation of compressible flows by lattice Boltzmann method, Numer. Heat Transf. Part A Appl., 75, 167, 10.1080/10407782.2019.1580053
Maleki, 2021, Thermal conductivity modeling of nanofluids with ZnO particles by using approaches based on artificial neural network and MARS, J. Therm. Anal. Calorim., 143, 4261, 10.1007/s10973-020-09373-9
Sadeghi, 2016, Numerical investigation of the natural convection film boiling around elliptical tubes, Numer. Heat Transf. Part A Appl., 70, 707, 10.1080/10407782.2016.1214484
Peng, 2020, Develop optimal network topology of artificial neural network (AONN) to predict the hybrid nanofluids thermal conductivity according to the empirical data of Al2O3—Cu nanoparticles dispersed in ethylene glycol, Phys. A Stat. Mech. Appl., 549, 124015, 10.1016/j.physa.2019.124015
Wang, N., Maleki, A., Nazari, M.A., Tlili, I., and Shadloo, M.S. (2020). Thermal Conductivity Modeling of Nanofluids Contain MgO Particles by Employing Different Approaches. Symmetry, 12.
Selimefendigil, 2019, Corrugated conductive partition effects on MHD free convection of CNT-water nanofluid in a cavity, Int. J. Heat Mass Transf., 129, 265, 10.1016/j.ijheatmasstransfer.2018.09.101
Sheikholeslami, 2018, Simulation of nanofluid flow and natural convection in a porous media under the influence of electric field using CVFEM, Int. J. Heat Mass Transf., 120, 772, 10.1016/j.ijheatmasstransfer.2017.12.087
Miroshnichenko, 2018, Natural convection of Al2O3/H2O nanofluid in an open inclined cavity with a heat-generating element, Int. J. Heat Mass Transf., 126, 184, 10.1016/j.ijheatmasstransfer.2018.05.146
Pordanjani, 2019, An updated review on application of nanofluids in heat exchangers for saving energy, Energy Convers. Manag., 198, 111886, 10.1016/j.enconman.2019.111886
Miroshnichenko, 2018, Natural convection of alumina-water nanofluid in an open cavity having multiple porous layers, Int. J. Heat Mass Transf., 125, 648, 10.1016/j.ijheatmasstransfer.2018.04.108
Pordanjani, 2018, Effect of two isothermal obstacles on the natural convection of nanofluid in the presence of magnetic field inside an enclosure with sinusoidal wall temperature distribution, Int. J. Heat Mass Transf., 121, 565, 10.1016/j.ijheatmasstransfer.2018.01.019
Aghakhani, 2019, Effect of replacing nanofluid instead of water on heat transfer in a channel with extended surfaces under a magnetic field, Int. J. Numer. Methods Heat Fluid Flow, 29, 1249, 10.1108/HFF-06-2018-0277
Dogonchi, 2018, Magneto-hydrodynamic natural convection of CuO-water nanofluid in complex shaped enclosure considering various nanoparticle shapes, Int. J. Numer. Methods Heat Fluid Flow, 29, 1663, 10.1108/HFF-06-2018-0294
Armaghani, 2018, MHD natural convection and entropy analysis of a nanofluid inside T-shaped baffled enclosure, Int. J. Numer. Methods Heat Fluid Flow, 28, 2916, 10.1108/HFF-02-2018-0041
Abbassi, 2018, Effects of Magnetohydrodynamics on Natural Convection and Entropy Generation with Nanofluids, J. Thermophys. Heat Transf., 32, 1059, 10.2514/1.T5343
Ghasemi, 2017, MHD nanofluid free convection and entropy generation in porous enclosures with different conductivity ratios, J. Magn. Magn. Mater., 442, 474, 10.1016/j.jmmm.2017.07.028
Yan, 2020, Influence of a membrane on nanofluid heat transfer and irreversibilities inside a cavity with two constant-temperature semicircular sources on the lower wall: Applicable to solar collectors, Phys. Scr., 95, 085702, 10.1088/1402-4896/ab93e4
Ghasemi, 2011, Magnetic field effect on natural convection in a nanofluid-filled square enclosure, Int. J. Therm. Sci., 50, 1748, 10.1016/j.ijthermalsci.2011.04.010
Pordanjani, A.H., and Aghakhani, S. (2021). Numerical Investigation of Natural Convection and Irreversibilities between Two Inclined Concentric Cylinders in Presence of Uniform Magnetic Field and Radiation. Heat Transf. Eng., 1–21.
Nia, 2018, Transient combined natural convection and radiation in a double space cavity with conducting walls, Int. J. Therm. Sci., 128, 94, 10.1016/j.ijthermalsci.2018.01.021
Ridouane, 2006, Effects of surface radiation on natural convection in a rayleigh-benard square enclosure: Steady and unsteady conditions, Heat Mass Transf., 42, 214, 10.1007/s00231-005-0012-7
Tian, 2021, A techno-economic investigation of 2D and 3D configurations of fins and their effects on heat sink efficiency of MHD hybrid nanofluid with slip and non-slip flow, Int. J. Mech. Sci., 189, 105975, 10.1016/j.ijmecsci.2020.105975
Ramesh, 1999, Effect of surface radiation and partition resistance on natural convection heat transfer in a partitioned enclosure: An experimental study, J. Heat Transf., 121, 616, 10.1115/1.2826024
Aghakhani, 2020, Natural convective heat transfer and entropy generation of alumina/water nanofluid in a tilted enclosure with an elliptic constant temperature: Applying magnetic field and radiation effects, Int. J. Mech. Sci., 174, 105470, 10.1016/j.ijmecsci.2020.105470
Karimipour, 2017, A novel case study for thermal radiation through a nanofluid as a semitransparent medium via discrete ordinates method to consider the absorption and scattering of nanoparticles along the radiation beams coupled with natural convection, Int. Commun. Heat Mass Transf., 87, 256, 10.1016/j.icheatmasstransfer.2017.07.020
Mansour, 2018, Effects of heat source and sink on entropy generation and MHD natural convection of Al2O3-Cu/water hybrid nanofluid filled with square porous cavity, Therm. Sci. Eng. Prog., 6, 57, 10.1016/j.tsep.2017.10.014
Mehryan, 2018, Natural convection and entropy generation of a ferrofluid in a square enclosure under the effect of a horizontal periodic magnetic field, J. Mol. Liq., 263, 510, 10.1016/j.molliq.2018.04.119
Sheikholeslami, 2015, Entropy generation of nanofluid in presence of magnetic field using Lattice Boltzmann Method, Phys. A Stat. Mech. Appl., 417, 273, 10.1016/j.physa.2014.09.053
Selimefendigil, 2015, Natural convection and entropy generation of nanofluid filled cavity having different shaped obstacles under the influence of magnetic field and internal heat generation, J. Taiwan Inst. Chem. Eng., 56, 42, 10.1016/j.jtice.2015.04.018
Cho, 2014, Heat transfer and entropy generation of natural convection in nanofluid-filled square cavity with partially-heated wavy surface, Int. J. Heat Mass Transf., 77, 818, 10.1016/j.ijheatmasstransfer.2014.05.063
Mahmoudi, 2014, Analysis of the entropy generation in a nanofluid-filled cavity in the presence of magnetic field and uniform heat generation/absorption, J. Mol. Liq., 198, 63, 10.1016/j.molliq.2014.07.010
Pordanjani, 2019, Effect of alumina nano-powder on the convection and the entropy generation of water inside an inclined square cavity subjected to a magnetic field: Uniform and non-uniform temperature boundary conditions, Int. J. Mech. Sci., 152, 99, 10.1016/j.ijmecsci.2018.12.030
Esfe, 2017, Application of three-level general factorial design approach for thermal conductivity of MgO/water nanofluids, Appl. Therm. Eng., 127, 1194, 10.1016/j.applthermaleng.2017.07.211
Khodadadi, 2019, Effects of nanoparticles to present a statistical model for the viscosity of MgO-Water nanofluid, Powder Technol., 342, 166, 10.1016/j.powtec.2018.09.076
Asadi, 2019, Heat transfer performance of two oil-based nanofluids containing ZnO and MgO nanoparticles; a comparative experimental investigation, Powder Technol., 343, 296, 10.1016/j.powtec.2018.11.023
Mbarki, 2015, Structural, dielectric relaxation and electrical conductivity behavior in MgO powders synthesized by sol–gel, Mater. Sci. Semicond. Process., 29, 300, 10.1016/j.mssp.2014.05.036
Aminossadati, 2009, Natural convection cooling of a localised heat source at the bottom of a nanofluid-filled enclosure, Eur. J. Mech. B/Fluids, 28, 630, 10.1016/j.euromechflu.2009.05.006