Mixed convection boundary layer flow and heat transfer over a vertical plate embedded in a porous medium filled with a suspension of nano-encapsulated phase change materials

By Mohammad Ghalambaz, Teodor Grosan, Ioan Pop. Journal of Molecular Liquids, 2019

147 citations recorded by the source corpus.

Abstract The flow and thermal behavior of nano-encapsulated phase change materials (NEPCMs) dispersed in a liquid is investigated over a vertical flat plate. The NEPCM particles are consist of an encapsulation shell and a core made of phase change materials (PCMs). When the temperature of the liquid around the NEPCM particle is higher than the fusion temperature of the PCM core, the PCM core absorbs a notable amount of heat (the latent heat of the phase change) from the host fluid and melts. The vertical plate is embedded in a porous medium, and the porous medium is saturated with the suspension of NEPCM. There is a uniform flow over the plate, which can aid or oppose the natural convection flow over the plate. The partial differential governing equations for the flow and heat transfer of NEPCM suspension are introduced and transformed into a high order boundary value ordinary differential equation. The finite difference method with a colocation technique as the grid adaptation and automatic error control is utilized to integrate the governing equations. Validations are performed by comparing the results with the literature. It is found that there are two solution branches in the case of high opposing flows. The results indicate that the presence of NEPCM particles enhances the heat transfer over the plate. The decrease in the fusion temperature of NEPCM cores enhances the heat transfer.

Subfields: Biomedical Engineering, Computational Mechanics, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/25c37c05162602528a81565b7e6cdb2bd8abd594

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Citations in the corpus

Local thermal nonequilibrium conjugate natural convection of nano‐encapsulated phase change particles in a partially porous enclosure (2020, unknown): “Hence, following the work of Ghalambaz et al, 42 the present study aims to address the heattransfer of the NEPCM-suspensions in a layer of the porous medium using the LTNE model for the first time.”
Theoretical Study of Convective Heat Transfer in Ternary Nanofluid Flowing past a Stretching Sheet (2021, background): “[23, 24] discussed natural convection in the flow of nanofluid containing phase change particles.”