Numerical study on mixed convection of a non-Newtonian nanofluid with porous media in a two lid-driven square cavity

Nazari, Saeed; Ellahi, R.; Sarafraz, M.M.; Safaei, Mohammad Reza; Asgari, Ali; Akbari, Omid Ali

doi:10.1007/s10973-019-08841-1

Cited by 168 publications

(57 citation statements)

References 97 publications

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“…The fluid flow over a revolving disk is recently examined by Hafeez et al 20 . The numerical study of the non-Newtonian water/Al 2 O 3 nanoliquid with 0–4% nano size particles inside a two-dimensional square cavity with cold and hot lid-driven motion is simulated at Richardson numbers using Fortran code 21 . The Maxwell fluid flow with the effect of homogeneous–heterogeneous reactions between two revolving disks and heat conduction was scrutinized by Ahmed et al 22 .…”

Section: Introductionmentioning

confidence: 99%

Hybrid nanofluid flow within the conical gap between the cone and the surface of a rotating disk

Gul

Kashifullah

Bilal

et al. 2021

Sci Rep

118

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The thermal management of the flow of the hybrid nanofluid within the conical gap between a cone and a disk is analyzed. Four different cases of flow are examined, including (1) stationary cone rotating disk (2) rotating cone stationary disk (3) rotating cone and disk in the same direction and (4) rotating cone and disk in the opposite directions. The magnetic field of strength $$B_{0}$$ B 0 is added to the modeled problem that is applied along the z-direction. This work actually explores the role of the heat transfer, which performs in a plate-cone viscometer. A special type of hybrid nanoliquid containing copper Cu and magnetic ferrite Fe3O4 nanoparticles are considered. The similarity transformations have been used to alter the modeled from partial differential equations (PDEs) to the ordinary differential equations (ODEs). The modeled problem is analytically treated with the Homotopy analysis method HAM and the numerical ND-solve method has been used for the comparison. The numerical outputs for the temperature gradient are tabulated against physical pertinent variables. In particular, it is concluded that increment in volume fraction of both nanoparticles $$\left( {\phi_{{Fe_{3} O_{4} }} ,\phi_{Cu} } \right)$$ ϕ F e 3 O 4 , ϕ Cu effectively enhanced the thermal transmission rate and velocity of base fluid. The desired cooling of disk-cone instruments can be gained for a rotating disk with a fixed cone, while the surface temperature remains constant.

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Section: Introductionmentioning

confidence: 99%

Hybrid nanofluid flow within the conical gap between the cone and the surface of a rotating disk

Gul

Kashifullah

Bilal

et al. 2021

Sci Rep

118

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“…Besides, nanofluids' novel characteristics can be used in a wide range of applications, especially heat transfer, electronics, biomedicine, and food (Sarfaraz 2018 , 2019a ; b ). Besides, nanofluids exhibit enhanced thermal conductivity and convective heat transfer as compared with other kinds of fluids (Shahsavar 2019 ; Akbari 2016 ; Bahmani 2018 ; Nazari 2020 ). Among all nanofluids, ferrofluids containing MNPs exhibit high nanoparticle stability with biomedical applications.…”

Section: Introductionmentioning

confidence: 99%

A facile, two-step synthesis and characterization of Fe3O4–LCysteine–graphene quantum dots as a multifunctional nanocomposite

Alaghmandfard

Hosseini

2021

Appl Nanosci

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In this research, a facile, two-step synthesis of Fe 3 O 4 -L Cysteine -graphene quantum dots (GQDs) nanocomposite is reported. This synthesis method comprises the preparation of GQDs via hydrothermal route, which should be conjugated to the L Cysteine functionalized core-shell magnetic structure with the core of about 7.5-nm iron oxide nanoparticle and 3.5-nm L Cysteine shell. L Cysteine, as a biocompatible natural amino acid, was used to link magnetite nanoparticles (MNPs) with GQDs. X-ray powder diffraction, Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, energy dispersive X-ray were used to investigate the presence and formation of MNPs, L Cysteine functionalized MNPs, and final hybrid nanostructure. Morphology and size distribution of nanoparticles were demonstrated by scanning electron microscopy and transmission electron microscopy. Finally, the magnetic and optical properties of the prepared nanocomposite were measured by vibrating sample magnetometer, ultraviolet-visible, and photoluminescence spectroscopy. The results show that Fe 3 O 4 -L Cysteine -GQDs nanocomposite exhibits a superparamagnetic behavior at room temperature with high saturation magnetization and low magnetic coercivity, which are 28.99 emu/g and 0.09 Oe, respectively. This nanocomposite also shows strong and stable emission at 460 nm and 530 nm when it is excited with the 235 nm wavelength. The magnetic GQDs structure also reveals the absorption wavelength at 270 nm. Therefore, Fe 3 O 4 -L Cysteine -GQDs nanocomposite can be considered as a potential multifunctional hybrid structure with magnetic and optical properties simultaneously. This nanocomposite can be used for a wide range of biomedical applications like magnetic resonance imaging (MRI) contrast agents, biosensors, photothermal therapy, and hyperthermia.

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“…Several studies have been conducted, and it is still undergoing at universities and research centers in this field. Additionally, many scientists have also reviewed and classified the studies performed in this area [3,4]. In recent years, minichannels and microchannels have attracted much attention, and scholars have investigated the combination of different configurations using nanofluids as cooling or heating fluids [5,6].…”

Section: Introductionmentioning

confidence: 99%

Configuration and Optimization of a Minichannel Using Water–Alumina Nanofluid by Non-Dominated Sorting Genetic Algorithm and Response Surface Method

et al. 2020

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Nanofluids in minichannels with various configurations are applied as cooling and heating fluids. Therefore, it is essential to have an optimal design of minichannels. For this purpose, a square channel with a cylinder in the center connected to wavy fins at various concentrations of an Al2O3 nanofluid is simulated using the finite volume method (FVM). Moreover, central composite design (CCD) is used as a method of design of experiment (DOE) to study the effects of three input variables, namely the cylinder diameter, channel width, and fin radius on the convective heat transfer and pumping power. The impacts of the linear term, together with those of the square and interactive on the response variables are determined using Pareto and main effects plots by an ANOVA. The non-dominated sorting genetic algorithm-II (NSGA-II), along with the response surface methodology (RSM) is applied to achieve the optimal configuration and nanofluid concentration. The results indicate that the effect of the channel width and cylinder diameter enhances about 21% and 18% by increasing the concentration from 0% to 5%. On the other hand, the pumping power response is not sensitive to the nanofluid concentration. Besides, the channel width has the highest and lowest effect on the heat transfer coefficient (HTC) and pumping power, respectively. The optimization for a concentration of 3% indicates that in Re = 500 when the geometry is optimized, the HTC enhances by almost 9%, while the pumping power increases by about 18%. In contrast, by increasing the concentration from 1% to 3%, merely an 8% enhancement in HTC is obtained, while the pumping power intensifies around 60%.

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Numerical study on mixed convection of a non-Newtonian nanofluid with porous media in a two lid-driven square cavity

Cited by 168 publications

References 97 publications

Hybrid nanofluid flow within the conical gap between the cone and the surface of a rotating disk

Hybrid nanofluid flow within the conical gap between the cone and the surface of a rotating disk

A facile, two-step synthesis and characterization of Fe3O4–LCysteine–graphene quantum dots as a multifunctional nanocomposite

Configuration and Optimization of a Minichannel Using Water–Alumina Nanofluid by Non-Dominated Sorting Genetic Algorithm and Response Surface Method

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