文章基本信息

标题：High-performance nanofluid synthesis and DFT-TDDFT study of graphene nanosheets along bent surface for enhanced oil-recovery implementations
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作者：Mohamed R. Eid ; Ahmed F. Al-Hossainy
期刊名称：Case Studies in Thermal Engineering
印刷版ISSN：2214-157X
电子版ISSN：2214-157X
出版年度：2021
卷号：25
页码：100983
DOI：10.1016/j.csite.2021.100983
出版社：Elsevier B.V.
摘要：Thermal characteristics over a slippage permeable curved surface of mono and hybrid nanofluid convective flows. The surface is assumed to be convoluted with radius R in circle part. The salt-water is used as a base fluid to model the flow with graphene and silica nanoparticles. The magnetic effect is taken into consideration with a heat source (sink) and thermal radiative flow impact. The mathematical model is solved by Chebyshev spectral collocation method after transformed into a nondimensional form. The nanostructure thin films of [ S H 2 O / G O ] m nanofluid and [ S H 2 O / G O S i O 2 ] h are synthesized by using a spin-coating technique process with a thickness of 100 ± 3 nm/25 °C. The structure characterization (FT-IR spectrum and XRD) results from experimental and DFT-TDDFT (DMOl 3 ) data are studied for mono and hybrid nanofluids. The outcomes show that the temperature is declined with a curvature of the surface, while the flow velocity is boosted. Rate of heat transmit is enhanced with the radiative and suction flow. The results specifically determine that Δ E g O p t values decrease from 2.293 eV for [ S H 2 O / G O ] m mono nanofluid to 1.196 eV for [ S H 2 O / G O S i O 2 ] h hybrid nanofluid using the DFT computations E H O M O and E L U M O calculations. This result concluded that the [ S H 2 O / G O ] m transformed from semiconductor to [ S H 2 O / G O S i O 2 ] h as a super-conductor hybrid nanofluid by adding (SiO 2 nanoparticles).
关键词：[ S H 2 O ;G O S i O 2 ] h ; Characterization properties ; DFT ; Hybrid nanofluid ; Curved surface