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Communication Dans Un Congrès Année : 2023

Melting of a phase change material in a moving capsule: A parametric study

Résumé

In recent years, there has been growing interest in the development of reversible thermal storage systems for urban development. The present work deals with one of these systems, which consists of a fluid flow carrying microcapsules containing a phase-change material (mPCM, cf. [1]) circulating in a porous layer integrated into the urban structure. It focuses on the the melting process occurring in the fluid-driven encapsulated phase change material. The fluid equations inside and outside the capsule are solved using the lattice-Boltzmann method on a two-dimensional simulation. A collision operator based on the partial saturated method ensures the boundary conditions at the interfaces between fluid and solid phases. A second set of distribution functions on the lattice is used to solve heat transfer, while an enthalpy-based model provides a realistic solution for the phase change, by means of an enhanced multi-relaxation-time collision operator. The results are detailed and investigated in order to understand the impact of several parameters (Reynolds number of the fluid, Stefan number of the phase-change material) on the phase change kinetics. The effect of the angular velocity of the shell with respect to its content is evaluated in particular.
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hal-04447356 , version 1 (09-02-2024)

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  • HAL Id : hal-04447356 , version 1

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Clément Rigal, Romain Noël, Agathe Chouippe, Denis Funfschilling, Yannick Hoarau. Melting of a phase change material in a moving capsule: A parametric study. EuroMech 2023 - Colloquium 622 on Suspension flows and rheology: inertia, shape and roughness matter, Jun 2023, Nice, France. ⟨hal-04447356⟩
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