An Unsteady Mixed Convection in a Driven Cavity Filled with Nanofluids Using an Externally Oscillating Lid

Jafari, Arian; Rahimian, Mohammad Hassan; Saeedmanesh, Alireza

doi:10.4236/jectc.2013.32008

Cited by 12 publications

(3 citation statements)

References 31 publications

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“…Kaya found nonsimilar solutions of steady laminar mixed convection heat transfer flow from a perpendicular cone in a porous medium with influence of radiation, conduction, interaction and having high porosity [40]. Jafari et al studied unsteady combined convection flow in a cavity in presence of nanofluid [41]. Bég et al outlined mixed convection boundary layer flow influenced by thermo-diffusion [42].…”

Section: Introductionmentioning

confidence: 99%

Mixed Convective Magnetohydrodynamic Heat Transfer Flow of Williamson Fluid Over a Porous Wedge

Panezai¹,

Rehman²,

Sheikh³

et al. 2019

AJMCM

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The present article examines the influence of thermal radiation on two-dimensional incompressible magnetohydrodynamic (MHD) mixed convective heat transfer flow of Williamson fluid flowing past a porous wedge. An adequate similarity transformation is adopted to reduce the fundamental boundary layer partial differential equations of Williamson fluid model in to a set of non-linear ordinary differential equations. The solutions of the resulting nonlinear system are obtained numerically using the fifth order numerical scheme the Runge-Kutta-Fehlberg method. The effects of different pertinent physical parameter such as magnetic parameter, Williamson parameter, radiation parameter and Prandtl number on temperature and velocity distributions are observed through graph.

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Section: Introductionmentioning

confidence: 99%

Mixed Convective Magnetohydrodynamic Heat Transfer Flow of Williamson Fluid Over a Porous Wedge

Panezai¹,

Rehman²,

Sheikh³

et al. 2019

AJMCM

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“…Their results suggest that the variation of the volume fraction, the Richardson number and Hartman number affects the thermal and flow patterns within the cavity. Jafari et al (2013) investigated an unsteady numerical simulation of laminar mixed convection within a cavity filled with copper-water nanofluid. The top lid moves backward and forward, generating mixed convection inside the cavity.…”

Section: Introductionmentioning

confidence: 99%

Unsteady numerical investigation of nanofluid mixed convection within a cubic cavity with periodic motion of double oscillatory walls

Nouari

El-Hafad

Lafdaili

et al. 2022

HFF

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Purpose The purpose of this study is to investigate the impact of the oscillatory movement on heat transfer within a double periodic lid-driven cubic enclosure filled with copper-water nanofluid and to figure out how the oscillations impact the fluid flow and thermal behavior inside the enclosure. The authors asserted that this study will help to improve the heat transfer efficiency and the thermal performance of various technical engineering equipments. Design/methodology/approach The cubic enclosure is heated differentially; the left side is cold, the right one is warm and the remaining walls are insulated. Based on the movement directions of the upper and bottom lids, two cases for lid-driven walls are examined (Case 1: same movement for both lids; Case 2: opposite movement for the lids). The finite volume approach was implemented to solve the time-dependent three-dimensional momentum and energy equations, adopting the power low as a scheme of resolution. The numerical study was carried out for a range of parameters: volume fraction (0 ≤ φ ≤ 0.06), Richardson number (0.1 ≤ Ri ≤ 10), non-dimensional lid frequency (2π/50 ≤ Ω ≤ 2π/10) and fixed Grashof number 105. Findings The numerical simulations were executed for two different cases of the direction of the motion of the oscillatory lids. Based on the findings obtained, decreasing the Richardson number with low lids frequency gives the best heat transfer enhancement for both cases. Furthermore, in the same conditions, swapping from Case 2 to Case 1 leads to enhancing the maximum average Nusselt number obtained by 29.74%. At a high Richardson number, using high lids frequency increases the heat transfer rate compared to using low lids frequency (an enhancement of 4.32% for Case 1 and 3.63% for Case 2). The best heat transfer rate was established for Case 1 when the lids move positively, transporting the cold flow to the hot side. In all cases, increasing the concentration of nanoparticles improves the heat transfer. Originality/value The current study gives an understanding of the problem of mixed convection in a cubic enclosure with oscillatory walls, which has received little attention. And also, there has been no study published on unsteady mixed convection within a double oscillatory lid-driven cavity.

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“…They found that the flow rate of the nanofluid required for a particular heat transfer rate was lower than the base fluid. Jafari and his group [19] numerically investigated the heat transfer enhancement for the laminar and mix convection in a cavity used with Cu / H2O nanofluid. They confirmed that the Grashof and Reynold Numbers have a great impact on improving the Nu and they stated that with increasing in the nanoparticles, the heat transfer is enhanced and it becomes more effective with a high Grashof numbers.…”

Section: -Introductionmentioning

confidence: 99%

CFD assessment of the effect of nanoparticles on the heat transfer properties of acetone/ZnBr2 solution

Mohammed

Giddings

Walker

et al. 2018

Applied Thermal Engineering

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An Unsteady Mixed Convection in a Driven Cavity Filled with Nanofluids Using an Externally Oscillating Lid

Cited by 12 publications

References 31 publications

Mixed Convective Magnetohydrodynamic Heat Transfer Flow of Williamson Fluid Over a Porous Wedge

Mixed Convective Magnetohydrodynamic Heat Transfer Flow of Williamson Fluid Over a Porous Wedge

Unsteady numerical investigation of nanofluid mixed convection within a cubic cavity with periodic motion of double oscillatory walls

CFD assessment of the effect of nanoparticles on the heat transfer properties of acetone/ZnBr2 solution

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