Heat Transfer by Natural Convection in a Square Enclosure Containing PCM Suspensions

Ho, Ching-Jenq; Huang, Ching‐Yuan; Lai, Chi Ming

doi:10.3390/en14102857

Cited by 5 publications

(3 citation statements)

References 28 publications

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“…Natural convection is a situation in which there is no external driving force but the fluid still moves, and the internal force that causes the movement of the fluid is the temperature difference; forced convection is a convection phenomenon that causes the fluid to move when an external force (such as a pump or fan) pushes the fluid. This paper belongs to the natural convection method [12] . The magnitude of heat convection heat transfer follows Newton's cooling equation…”

Section: Mmeat-2022mentioning

confidence: 99%

Optimal design of the heat-sealing structure of the sealing machine based on SOLIDWORKS Simulation

Wang

Liu

2022

J. Phys.: Conf. Ser.

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In order to optimize the sealing machine, this paper takes the heat sealing block in the heat sealing structure of the sealing machine as the research object, and improves the working efficiency and stability of the sealing machine by changing the size and structure of the heat sealing block. The 3D modeling of the sealing machine was carried out by using SOLIDWORKS; then the reliability of the simulation in this paper was verified by comparing the experimental data and the simulation data; finally, the comparison of the simulation data of the heat sealing block before and after the modification found that the modification of the heat sealing block reduced the heating time by 7.5 s , the variance value is reduced by 96.8%, and the uniformity of heat distribution is significantly improved.

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Section: Mmeat-2022mentioning

confidence: 99%

Optimal design of the heat-sealing structure of the sealing machine based on SOLIDWORKS Simulation

Wang

Liu

2022

J. Phys.: Conf. Ser.

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“…Additionally, the magnitude of stream-line circulations is decreased by the ratio of square blockage. Some recent references are seen in [21][22][23][24][25] This article compares the effects of heat transfer between a SiO 2 − water nanofluid and Co ferrofluid inside an enclosure that involves a body that generates heat and has a variety of thermal boundaries. The top wall is insulated; the heated left wall is sinusoidally heated; the right wall is cold; and the bottom wall is uniformly heated.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study on Thermal Transmission Aspects of Nano and Ferrofluid in Enclosures Holding Heat-Generating Body

Umadevi¹,

Alessa

Sadhana³

et al. 2022

Coatings

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The heat-transmission characteristics of Co ferrofluid and SiO2−water nanofluid are compared numerically inside enclosures including a heat-generating body. Using the finite-volume method, a steady laminar incompressible flow in two dimensions is solved. The numerical study is conducted to determine the impacts of the solid volume fraction (φ=0.02,0.1 and 0.2), the temperature-difference ratio (ΔT*=0,4 and 20), and the Rayleigh number (Ra=105,106 and 107) on both SiO2−water nanofluid and Co ferrofluid, respectively. In consideration of isothermal and streamlines contours, the aspects of temperature transmission and fluid flow are addressed. It is shown that there is no remarkable difference in the convection rate for both the fluids while increasing the Rayleigh number and temperature difference ratio.

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“…They found that their modeling results accurately predicted both the improvement and deterioration of natural convection heat transfer. Ho et al [39] used the implicit finite difference method to investigate the transient and steady-state natural convection heat transfer in a square cavity containing a phasechange material (PCM) suspension. They found that the PCM's low latent heat could create oscillatory natural convection under high Rayleigh number.…”

Section: Introductionmentioning

confidence: 99%

Natural Convection over Two Superellipse Shapes with a Porous Cavity Populated by Nanofluid

Alsedais

2021

Energies

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The influences of superellipse shapes on natural convection in a horizontally subdivided non-Darcy porous cavity populated by Cu-water nanofluid are inspected in this paper. The impacts of the inner geometries (n = 0.5,1,1.5,4) Rayleigh number (103 ≤ Ra ≤ 106), Darcy number (10−5 ≤ Da ≤ 10−2), porosity (0.2 ≤ ϵ ≤ 0.8), and solid volume fraction (0.01 ≤ ∅ ≤ 0.05) on nanofluid heat transport and streamlines were examined. The hot superellipse shapes were placed in the cavity’s bottom and top, while the adiabatic boundaries on the flat walls of the cavity were considered. The governing equations were numerically solved using the finite volume method (FVM). It was found that the movement of the nanofluid upsurged as Ra boosted. The temperature distributions in the cavity’s core had an inverse relationship with increasing Rayleigh number. An extra porous resistance at lower Darcy numbers limited the nanofluid’s movement within the porous layers. The mean Nusselt number decreased as the porous resistance increased (Da ≤ 10−4). The flow and temperature were strongly affected as the shape of the inner superellipse grew larger.

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Heat Transfer by Natural Convection in a Square Enclosure Containing PCM Suspensions

Cited by 5 publications

References 28 publications

Optimal design of the heat-sealing structure of the sealing machine based on SOLIDWORKS Simulation

Optimal design of the heat-sealing structure of the sealing machine based on SOLIDWORKS Simulation

Comparative Study on Thermal Transmission Aspects of Nano and Ferrofluid in Enclosures Holding Heat-Generating Body

Natural Convection over Two Superellipse Shapes with a Porous Cavity Populated by Nanofluid

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