Effect of Mushy Zone Parameter on Phase Change Behavior of Different Configurations Storage Unit: Numerical Simulation and Experimental Validation

Soliman, Ahmed Saad; Sultan, Ahmed Abd El-Razik Ahmed; Sultan, Mohamed A.

doi:10.3390/su142114540

Cited by 21 publications

(2 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When paraffin wax solidifies, a mushy zone is formed in the region of the temperature between the liquidus and solidus (see refs. [ 39 , 40 , 41 ]):

. In our case, the values of

and

in Equation (9) should be replaced by

and

, respectively.…”

Section: Discussionmentioning

confidence: 99%

Apple-like Shape of Freezing Paraffin Wax Droplets and Its Origin

et al. 2023

View full text Add to dashboard Cite

Paraffin wax stores energy in the form of latent heat at a nearly constant temperature during melting and releases this energy during solidification. This effect is used in industrial energy storage. At the same time, the possible deformation of even small volumes of material as a result of phase change is insufficiently studied. In this paper, the physical nature of such deformation, probably for the first time, is studied on the example of a droplet of paraffin wax. An unusual change in the shape of a melted droplet of paraffin wax placed on a relatively cold glass plate was observed in the laboratory experiments. As the droplet solidifies, its upper surface becomes nearly flat, and a dimple is formed in the center of this surface, making the droplet look like a fruit (pumpkins are more commonly shaped like this, but the authors prefer apples). A series of experiments, as well as physical and numerical modeling of the droplet’s thermal state, taking into account the formation of a mushy zone between liquidus and solidus, made it possible to understand the role of gravity and gradual increase in viscosity and density of paraffin wax on changing the droplet shape and, in particular, to clarify the mechanism of formation of the dimple on its upper. It was shown that the mushy zone between the liquidus and solidus of the paraffin wax is responsible for the dimple formation.

show abstract

“…When paraffin wax solidifies, a mushy zone is formed in the region of the temperature between the liquidus and solidus (see refs. [ 39 , 40 , 41 ]):

. In our case, the values of

and

in Equation (9) should be replaced by

and

, respectively.…”

Section: Discussionmentioning

confidence: 99%

Apple-like Shape of Freezing Paraffin Wax Droplets and Its Origin

et al. 2023

View full text Add to dashboard Cite

show abstract

“…When paraffin wax solidifies, a mushy zone is formed in the region of the temperature between the liquidus and solidus (see refs. [39][40][41]): τ sol < τ < τ liq . In our case, the values of τ m and ∆τ in Equation ( 9) should be replaced by τ liq + τ sol /2 and τ liq − τ sol /2, respectively.…”

Section: A Model Of Cooling and Solidification Of A Paraffin Wax Dropletmentioning

confidence: 99%

Apple-Like Shape of Freezing Paraffin Wax Droplets and its Origin

Roy¹,

Shoval²,

Shvalb³

et al. 2023

Preprint

View full text Add to dashboard Cite

Paraffin wax stores energy in the form of latent heat at a nearly constant temperature during melting and releases this energy during solidification. This effect is used in industrial energy storage. An unusual change in the shape of a melted droplet of paraffin wax placed on a relatively cold glass plate is studied. As the droplet solidifies, its upper surface becomes nearly flat and a dimple is formed in the center of this surface, making the droplet look like a fruit (pumpkins are more commonly shaped like this, but the authors prefer apples). A series of experiments, as well as physical and numerical modeling of the droplet's thermal state, taking into account the formation of a mushy zone between liquidus and solidus, made it possible to understand the role of gravity and gradual increase in viscosity and density of paraffin wax on changing the droplet shape and, in particular, to clarify the mechanism of formation of the dimple on its upper.

show abstract

Numerical investigation of performance enhancement in a PCM-based thermal energy storage system using stair-shaped fins and nanoparticles

Shahamat,

Mehrdoost

2024

Applied Thermal Engineering

View full text Add to dashboard Cite

Effect of Mushy Zone Parameter on Phase Change Behavior of Different Configurations Storage Unit: Numerical Simulation and Experimental Validation

Cited by 21 publications

References 27 publications

Apple-like Shape of Freezing Paraffin Wax Droplets and Its Origin

Apple-like Shape of Freezing Paraffin Wax Droplets and Its Origin

Apple-Like Shape of Freezing Paraffin Wax Droplets and its Origin

Numerical investigation of performance enhancement in a PCM-based thermal energy storage system using stair-shaped fins and nanoparticles

Contact Info

Product

Resources

About