Muhammad Noor, Nadeem Sohail, Mustafa M T
Department of Mathematics, Quaid-I-Azam University 45320, Islamabad 44000, Pakistan.
Department of Mathematics, Statistics and Physics, Qatar University, Doha 2713, Qatar.
PLoS One. 2018 Jan 10;13(1):e0188460. doi: 10.1371/journal.pone.0188460. eCollection 2018.
Theoretical analysis has been carried out to establish the heat transport phenomenon of six different ferromagnetic MnZnFe2O4-C2H6O2 (manganese zinc ferrite-ethylene glycol), NiZnFe2O4-C2H6O2 (Nickel zinc ferrite-ethylene glycol), Fe2O4-C2H6O2 (magnetite ferrite-ethylene glycol), NiZnFe2O4-H2O (Nickel zinc ferrite-water), MnZnFe2O4-H2O (manganese zinc ferrite-water), and Fe2O4-H2O (magnetite ferrite-water) nanofluids containing manganese zinc ferrite, Nickel zinc ferrite, and magnetite ferrite nanoparticles dispersed in a base fluid of ethylene glycol and water mixture. The performance of convective heat transfer is elevated in boundary layer flow region via nanoparticles. Magnetic dipole in presence of ferrites nanoparticles plays a vital role in controlling the thermal and momentum boundary layers. In perspective of this, the impacts of magnetic dipole on the nano boundary layer, steady, and laminar flow of incompressible ferromagnetic nanofluids are analyzed in the present study. Flow is caused by linear stretching of the surface. Fourier's law of heat conduction is used in the evaluation of heat flux. Impacts of emerging parameters on the magneto-thermomechanical coupling are analyzed numerically. Further, it is evident that Newtonian heating has increasing behavior on the rate of heat transfer in the boundary layer. Comparison with available results for specific cases show an excellent agreement.
已进行理论分析,以确定六种不同的铁磁体纳米流体的热传输现象,这些纳米流体分别是:锰锌铁氧体 - 乙二醇(MnZnFe2O4 - C2H6O2)、镍锌铁氧体 - 乙二醇(NiZnFe2O4 - C2H6O2)、磁铁矿铁氧体 - 乙二醇(Fe2O4 - C2H6O2)、镍锌铁氧体 - 水(NiZnFe2O4 - H2O)、锰锌铁氧体 - 水(MnZnFe2O4 - H2O)以及磁铁矿铁氧体 - 水(Fe2O4 - H2O),它们含有分散在乙二醇和水混合物基液中的锰锌铁氧体、镍锌铁氧体和磁铁矿铁氧体纳米颗粒。通过纳米颗粒,对流换热性能在边界层流动区域得到提升。铁氧体纳米颗粒存在时的磁偶极子在控制热边界层和动量边界层方面起着至关重要的作用。鉴于此,本研究分析了磁偶极子对不可压缩铁磁体纳米流体的纳米边界层、稳态和层流的影响。流动由表面的线性拉伸引起。在热通量评估中使用傅里叶热传导定律。数值分析了新出现的参数对磁热机械耦合的影响。此外,很明显牛顿加热对边界层中的热传递速率具有增强作用。与特定情况下的现有结果比较显示出极好的一致性。