Natural convection of composite nanofluids based on a two-phase lattice Boltzmann model
作者： Cong Qi , Jinghua Tang , Guiqing Wang
DOI: 10.1007/S10973-020-09519-9
关键词: Lattice Boltzmann methods 、 Natural convection 、 Volume (thermodynamics) 、 Phase (matter) 、 Nusselt number 、 Thermodynamics 、 Nanofluid 、 Heat exchanger 、 Heat transfer 、 Materials science
摘要: A two-phase lattice Boltzmann method (LBM) is used to study the natural convection heat exchange characteristics of Al2O3–H2O nanofluids and (Al2O3/Cu)–H2O composite in a rectangular cavity this paper. It can be found that LBM suitable for on nanofluids, its correctness verified. Firstly, effects temperature differences (∆T = 1 K ∆T = 11 K), volume fractions (φ = 0.01, 0.03 0.05) kinds fluid (water, Al2O3/Cu–H2O nanofluids) free are researched. Then, streamline distributions investigated, respectively. Lastly, local Nusselt number average different along with Y direction investigated. show larger enhancement than water. strengthen transfer performance by 9.9% 5% at extreme compared deionized water, Besides, maximum ratio 9.8% 4.5% small difference (ΔT = 1 K), respectively, which greater (1.6% 0.36%) big (ΔT = 11 K).
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