Effects of buoyancy-driven convection on melting within spherical containers

Khodadadi, J. M.; Zhang, Y.

doi:10.1016/s0017-9310(00)00192-7

Cited by 193 publications

(46 citation statements)

References 8 publications

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“…Large Stefan number results in an increase in the temperature gradient in molten PCM, an effect which contributes the further melting. This is consistent with the previous works [46][47][48]. In case of small Stefan number, the length of the melting front increases, as shown in Fig.…”

Section: Effect Of Abrupt Dynamic Motion On Melting Rate For Differensupporting

confidence: 93%

Numerical study of melting of a phase change material (PCM) enhanced by deformation of a liquid–gas interface

Kim

Hossain

Nakamura

2013

International Journal of Heat and Mass Transfer

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Numerical simulations are performed in order to examine the time-dependent melting, and heavily deforming processes of phase change material (PCM) subjected to local heating. By comparing cases with and without deformation, the impact of the inclusion of a deformation model is firstly addressed to understand what influences the precise melting behavior. Mass, momentum and energy conservation equations are solved in a 2-D system based on a fixed grid by means of a finite volume method. The Volume of Fluid (VOF) method and the Enthalpy-Porosity method are applied to model the deformable liquid-gas interface and the melting processes, respectively. Results successfully show the melting, subsequent deformation and dropping-off behavior of the molten PCM. It is found that the inclusion of the deformation model enhances the melting owing to the increase of the total received heat; namely, widening of the contact area at the melting front and induced flow motion inside molten PCM improve the heat transfer toward the melting front. Parametric studies by varying the applied Stefan number so as to change the surface tension are also made to ensure the above-mentioned enhancement mechanism is universally applicable.

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Section: Effect Of Abrupt Dynamic Motion On Melting Rate For Differensupporting

confidence: 93%

Numerical study of melting of a phase change material (PCM) enhanced by deformation of a liquid–gas interface

Kim

Hossain

Nakamura

2013

International Journal of Heat and Mass Transfer

View full text Add to dashboard Cite

show abstract

“…However, available experiments [6,10,13] have demonstrated that natural convection also plays an important role, and differences occur during melting and solidification, thereby making the two processes highly distinct. The effect of natural convection on constrained melting of PCM within spherical containers has been conducted numerically [15] and experimentally [16]. Results showed that in the early stages of a melting process, the conduction mode of heat transfer is dominant.…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

Numerical investigation of heat transfer mechanism in a vertical shell and tube latent heat energy storage system

Seddegh

Wang

Henderson

2015

Applied Thermal Engineering

133

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“…The constrained melting of PCM within a spherical bulb was presented by Khodadadi and Zhang [12]. They numerically studied the effects of buoyancy-driven convection.…”

Section: Introductionmentioning

confidence: 99%