Numerical investigation of laminar flow and heat transfer of non-Newtonian nanofluid within a porous medium

Barnoon, Pouya; Toghraie, Davood

doi:10.1016/j.powtec.2017.10.040

Cited by 133 publications

(39 citation statements)

References 78 publications

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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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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 presence of thermal radiation, heat generation, and Joule heating mixed convection on MHD drift of a Eyring‐Powell nanoliquid was analyzed by Ghadikolaei et al Recently, Rasool et al presented nanoliquid drift over a convectively heated vertical Riga plate. Other closely related studies can be found in References …”

Section: Introductionmentioning

confidence: 98%

Passive control nanoparticles in double‐diffusive free convection nanofluid flow over an inclined permeable plate

Sarkar

Kundu

2019

Heat Trans. Asian Res.

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The present study has been conducted to acquire the solutions for the flow problem of an incompressible nanofluid past a permeable inclined plate implanted in a porous medium. In this study, double-diffusivity, Brownian motion, and thermophoresis as well as passive control nanoparticles have been studied. We employ Lie group transformation on the ruling equations to extract nonlinear ordinary differential equations and solve them numerically using the fourth-order Runge-Kutta method and shooting approach. The supremacy of affined parameters on temperature and velocity distributions has been exposed by means of tables and graphs. This investigation suggests that both fluid velocity and nanoparticle concentration are enhanced by the modified Dufour parameter and the thermophoresis parameter. The assistance of the Lewis number intensifies the heat transport for suction. K E Y W O R D SBrownian motion, double diffusion, nanofluid, passive control, suction/injection, thermophoresis

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“…Kefayati 12 employed a finite difference lattice Boltzmann method to simulate the thermal convection in power‐law fluids in a sinusoidal heated cavity showing that with increasing power‐law rheological index (from pseudoplastic to dilatant), there is a suppression in heat transfer. Further studies of enclosure convection include Kefayati 13 (on magnetic power‐law nanofluids), Jecl and Škerget 14 (who employed a boundary element method for power‐law fluids), and Barnoon and Toghraie 15 (who used a finite volume method to simulate pseudo‐plastic non‐Newtonian nanofluid (Al 2 O 3 + CMC) within a porous circular concentric region). Several excellent benchmark studies exist for numerical simulations of natural convection in enclosures including the work of de Vahl Davis 16 who simulated natural convection heat transfer in an air filled square cavity.…”

Section: Introductionmentioning

confidence: 99%

Simulation of unsteady natural convection flow of a Casson viscoplastic fluid in a square enclosure utilizing a MAC algorithm

Devi

Lakshmi

Venkatadri³

et al. 2020

Heat Trans

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Non-Newtonian fluids are increasingly being deployed in energy systems and materials processing. Motivated by these developments, in the current study, a numerical simulation is performed on twodimensional, unsteady buoyancy-driven flow in a square cavity filled with non-Newtonian fluid (Casson liquid). The enclosure geometry features vertical isothermal walls (with one at higher temperature than the other) and thermally insulated horizontal walls. The conservation equations for mass, momentum, and energy are normalized via appropriate transformations and the resulting dimensionless partial differential boundary value problem is solved computationally with a marker and cell algorithm, which features a finite difference scheme along with a staggered grid system. The projection method is employed to evaluate the pressure term. Extensive visualizations of the impact of emerging physical parameters (Rayleigh number and Casson viscoplastic parameter) on streamline and isotherm distributions in the cavity are presented for fixed Prandtl number. Nusselt number, that is, heat transfer rate, is increased with rising values of the Casson viscoplastic fluid parameter for any value of Rayleigh number. The density of streamlines increases with increasing values of Casson viscoplastic fluid parameter upto 1. Overall, the Casson fluid parameter plays a vital role in controlling the convective heat transfer within the enclosure. The computations are relevant to hybrid solar collectors, materials fabrication (polymer melts), etc. K E Y W O R D S finite difference scheme, flow visualization, free convection, isotherms, non-Newtonian (Casson) fluid, projection method, square enclosure, unsteady flow

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Numerical investigation of laminar flow and heat transfer of non-Newtonian nanofluid within a porous medium

Cited by 133 publications

References 78 publications

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

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

Passive control nanoparticles in double‐diffusive free convection nanofluid flow over an inclined permeable plate

Simulation of unsteady natural convection flow of a Casson viscoplastic fluid in a square enclosure utilizing a MAC algorithm

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