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|All Authors / Contributors:||
Tarik El Rhafiki; Eric Schall; Mimet.; Youssef Zeraouli; Université de Pau et des Pays de l'Adour.; Université AbdelMalek Essaidi, Tetouan, Maroc.
|Description:||1 vol. (IV-188 p.) ; 30 cm.|
|Other Titles:||Numerical study and modeling of two phase flow solid-liquid undergoing a phase change in a heat exchanger. Application to the ice and stabilized slurry.|
|Responsibility:||Tarik El Rhafiki ; sous la direction de Eric Schall, Abdelaziz Mimet et Youssef Zeraouli.|
This study is in the field of the cold storage and distribution by latent heat. It deals, mostly numerical with two-phase flows undergoing solid-liquid phase changes inside an exchanger. Two types of phase change materials were tested : ice and stabilized slurry. The ice slurry is a suspension composed of a carrier phase-based water and ethanol and an active phase consisting of ice particles. In the stabilized slurry, the suspended particles are encapsulated and can contain either a pure or binary solution. The ice slurry flow was modelled by assuming a thermodynamic equilibrium between the solid and liquid phases allowing for coupling between the temperature and the ice fraction. The results of simulations proved to be in good agreement with the experimental data obtained in parallel. In the case of the stabilized slurry, a model was proposed to describe the homogeneous flow in a 2D configuration. This model took into account the heat transfer including the phase change related effects. The cases of either heating (melting of a pure or binary solution) or cooling (crystallization of a pure substance) were performed. The model allows to determine the heat transfer coeffcient between the binary mixture and the exchanger wall. Finally, a two-phase model based on an Euler-Euler approach was developed. The last one described different mechanisms such as : mass, momentum and energy transfer between the two phases. It also offered the possibility to study the effect of the binary mixture on the heat transfer near the exchanger wall.
- Écoulement diphasique -- Thèses et écrits académiques.
- Chaleur latente de fusion -- Thèses et écrits académiques.
- Simulation par ordinateur -- Thèses et écrits académiques.
- Thermocinétique -- Thèses et écrits académiques.
- Coulis de glace/Coulis stabilisé/Ecoulement diphasique/MCP/Fusion/Cristallisation