The effect of aspect ratio on PCM melting behaviour in rectangular enclosure

Hamad, Faik; Egelle, Emenike; Gooneratne, Samantha; Russell, Paul

doi:10.1080/19397038.2021.1913533

Cited by 13 publications

(8 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, a decreasing would prolong the first stage and delay the transition, which explains the observation of Hamad et al. (2021) that an increasing cavity width (), i.e. increasing , results in an early transition from first to second melting stages.…”

Section: Discussionmentioning

confidence: 99%

“…In addition to the Stefan number, γ also affects the onset of convection (Gadgil & Gobin 1984;El Qarnia, Draoui & Lakhal 2013;Behbahan et al 2019). Hamad et al (2021) found recently that an earlier transition from conduction to convection will be observed during the PCM melting, when the width of a rectangular container is increased. It is seen clearly that all these control parameters influence the melting rate.…”

Section: Introductionmentioning

confidence: 92%

“…2015; Hamad et al. 2017, 2021). In the first stage, the melted liquid layer is thin; thus the viscosity dominates the flow.…”

Section: Thermal Flowsmentioning

confidence: 99%

“…Hamad et al. (2021) found recently that an earlier transition from conduction to convection will be observed during the PCM melting, when the width of a rectangular container is increased. It is seen clearly that all these control parameters influence the melting rate.…”

Section: Introductionmentioning

confidence: 98%

“…2006; Hamad et al. 2017, 2021). Amongst these studies, several fitting expressions, usually termed ‘correlations’, are reported for the melted liquid fraction , as summarised in table 1.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Melting processes of phase change materials in a horizontally placed rectangular cavity

Jiao²,

Jia³

2022

J. Fluid Mech.

View full text Add to dashboard Cite

This paper revisits the melting process of phase change materials (PCMs) enclosed in a horizontally placed rectangular cavity, with isothermal and adiabatic conditions subjected to the vertical and horizontal walls, respectively. First, numerical simulations based on an improved lattice Boltzmann method are conducted to illustrate and to inform the theoretical modelling. It is shown that, compared with the traditional two-stage conduction–convection melting description, it is more reasonable to include a third stage in terms of the heat transfer behaviour. During the third stage, the remnant solid PCM is located in the corner formed by the cold and bottom walls of the cavity, and an increasing part of the input energy will be transferred directly out of the cavity without compensating for the melting latent heat, thus inducing a continuously decreasing melting rate until the end of the melting process. Then theoretical predictions are derived piecewise for the melted liquid fraction during the entire melting process, and the corresponding transitions between two successive stages are also discussed. The results are validated successfully via the available experimental and numerical data in the literature, and could guide the design and operation of latent heat storage systems.

show abstract

Section: Discussionmentioning

confidence: 99%