The numerical modeling of water/FMWCNT nanofluid flow and heat transfer in a backward-facing contracting channel

Al‐Rashed, Abdullah A.A.A.; Akbari, Omid Ali; Heydari, Ali; Toghraie, Davood; Zarringhalam, Majid; Shabani, Gholamreza Ahmadi Sheikh; Seifi, Ali Reza; Goodarzi, Marjan

doi:10.1016/j.physb.2018.02.022

Cited by 171 publications

(49 citation statements)

References 83 publications

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“…It is important to mention here that Makinde and Animasaun [20] investigated an admirable work related to magnetized nanofluid flow alongside quartic autocatalysis chemical reaction and bio-convection, and recorded that, for a fixed numeric of magnetic parameters, the local skin friction further develops at a larger thickened parametric value, whereas the rate of local heat transfer decreases at high-temperature parametric values past an uppermost subsurface of a paraboloid of uprising. Scrutinizing the definitive utilities for nanofluid and MHD, few recent investigations can be found [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38].Activation energy is the minimum supply of energy needed to accomplish a chemical reaction. Very few researchers have studied the activation energy along with chemical reaction to date.…”

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confidence: 99%

Study of Activation Energy on the Movement of Gyrotactic Microorganism in a Magnetized Nanofluids Past a Porous Plate

et al. 2020

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The present study deals with the swimming of gyrotactic microorganisms in a nanofluid past a stretched surface. The combined effects of magnetohydrodynamics and porosity are taken into account. The mathematical modeling is based on momentum, energy, nanoparticle concentration, and microorganisms’ equation. A new computational technique, namely successive local linearization method (SLLM), is used to solve nonlinear coupled differential equations. The SLLM algorithm is smooth to establish and employ because this method is based on a simple univariate linearization of nonlinear functions. The numerical efficiency of SLLM is much powerful as it develops a series of equations which can be subsequently solved by reutilizing the data from the solution of one equation in the next one. The convergence was improved through relaxation parameters in the study. The accuracy of SLLM was assured through known methods and convergence analysis. A comparison of the proposed method with the existing literature has also been made and found an excellent agreement. It is worth mentioning that the successive local linearization method was found to be very stable and flexible for resolving the issues of nonlinear magnetic materials processing transport phenomena.

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confidence: 99%

Study of Activation Energy on the Movement of Gyrotactic Microorganism in a Magnetized Nanofluids Past a Porous Plate

et al. 2020

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“…For hydrothermal features of cooling methods, many investigations have assessed different micro HSs for laminar and turbulent flow employing air, water, and nanofluids as Newtonian and non‐Newtonian are commonly used. These cooling approaches have been developed by the following techniques—straight flat plate fins, wavy plate fins, vortex generator, grooved tubes, inclined solid ribs, porous media, two‐phase flow, and magnetic field . All these attempts are enhanced by the thermohydraulic performance of different HS designs for more reduction in the weight and volume of electronic, electrical, and solar systems.…”

Section: Introductionmentioning

confidence: 99%

Three‐dimensional computational comparison of mini‐pinned heat sinks using different nanofluids: Part two—energy and exergy characteristics

Al‐damook

Alfellag

Khalil

2019

Heat Trans. Asian Res.

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The energy and exergy characteristics of 3D-pinned heat sink (HS) designs have been computationally compared as the second part of a three-part investigation. Different pin profiles, such as circular, square, triangular, strip and elliptic pins, and without pin HS are conducted with three different types of nanofluids-Al 2 O 3 -water, SiO 2 -water, and CuO-water for laminar forced convection. The concentrations of nanofluids vary from 0 to 5 vol% with different Reynolds numbers ranging between 100 and 1000. The finite volume method employing the SIMPLE algorithm for a computational solution is applied to solve the Navier-Stokes and energy equations. Four criterions studies are explained-energy efficiency, exergy loss, and exergy efficiency of HSs with pressure drop. The results showed that the highest energy and exergy efficiencies are nearly 76% and 57%, respectively, for elliptic-pinned HSs using pure water, while about 82% and 62% using 5 vol% of SiO 2 -water nanofluids. Besides, the elliptic-pinned HSs have a favorable reduction in the exergy loss, nearly 17% using 5 vol% of SiO 2 -water nanofluids. Subsequently, the elliptic-pinned HS is recommended to apply with pure water considering the development in pressure drop required. However, the elliptic-pinned HSs could be employed with 5 vol% of SiO 2 -water nanofluids regardless of the development in pressure drop required for thermal energy dissipation applications with more exergy efficiency and reduction of exergy loss. K E Y W O R D Sdifferent nanofluids, different pinned heat sinks, energy and exergy characteristics, exergy loss, thermal energy enhancement

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“…It has been shown that such conductive particles have plausible influence on the heat capacity, thermal conductivity and density of the base fluid. However, disadvantage of presence of nanoparticles is reflected in the increase in the value of the pressure drop and also a deterioration in the HTC in boiling and evaporation studies [49][50][51][52][53].…”

Section: Introductionmentioning

confidence: 99%

Thermal performance of a micro heat exchanger (MHE) working with zirconia-based nanofluids for industrial cooling

Nikkhah

Nakhjavani

2019

Int J Ind Chem

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An experimental investigation was performed with the view to assess the heat transfer characteristics of a water-based nanofluid in a micro heat exchanger employed to quench a high heat flux heater for industrial and microelectronic cooling applications. The experiments were conducted at heat fluxes 10-70 kW/m 2 and for nanofluids at various mass concentrations of 0.1-0.3% and passing flow rates of 0.1-5 l/min. Thermo-physical properties of the nanofluid including thermal conductivity, heat capacity, density and viscosity of nanofluid were experimentally measured at 40 °C close to the temperature of the experiments. Results showed that the heat transfer coefficient and pressure drop were augmented by 40.1% and 67% at wt% = 0.3 compared to the base fluid, respectively. The enhancement in the heat transfer coefficient was associated with the improvement in the thermal conductivity of the base fluid together with the intensification of Brownian motion and thermophoresis effect. The increase in the pressure drop was also attributed to the increase in the viscosity of the working fluid which induces layer-layer frictional forces in the bulk of the coolant in micro heat exchanger.

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The numerical modeling of water/FMWCNT nanofluid flow and heat transfer in a backward-facing contracting channel

Cited by 171 publications

References 83 publications

Study of Activation Energy on the Movement of Gyrotactic Microorganism in a Magnetized Nanofluids Past a Porous Plate

Study of Activation Energy on the Movement of Gyrotactic Microorganism in a Magnetized Nanofluids Past a Porous Plate

Three‐dimensional computational comparison of mini‐pinned heat sinks using different nanofluids: Part two—energy and exergy characteristics

Thermal performance of a micro heat exchanger (MHE) working with zirconia-based nanofluids for industrial cooling

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