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Communication Dans Un Congrès Année : 2023

Building a boiling-flow multiphase CFD framework for interfacial area and heat transfer modeling

Résumé

Multiphase CFD's predictions for boiling flow are limited by available models for interfacial heat transfer and area. Both terms are greatly interdependent.Much research has relied upon adiabatic experiments on bubbly flow to determine the contribution of coalescence and breakup terms on the interfacial area independently of heat transfer. These models are often applied to boiling flows. We develop a 2-fluid Euler-Euler CFD framework based on the PolyMAC numerical scheme in CEA's open-source TrioCFD code. We implement a $k- \omega$ turbulence model, along with an original adaptive wall law treatment. Interfacial momentum closure terms are selected and validated using bubbly adiabatic experiments on vertical flows. The local experimental bubble diameter is enforced to limit interactions with interfacial area closures. We simulate the Debora experiment, an ascending boiling freon flow in a tube. We enforce the experimental diameter to isolate condensation from coalescence and breakup effects. The long-term goal is to run simulations using independently selected coalescence-fragmentation and heat transfer closures.
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Dates et versions

cea-04190863 , version 1 (30-08-2023)

Identifiants

  • HAL Id : cea-04190863 , version 1

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Corentin Reiss, Antoine Gerschenfeld, Catherine Colin. Building a boiling-flow multiphase CFD framework for interfacial area and heat transfer modeling. NURETH20 - 20th International Topical Meeting on Nuclear Reactor Thermal Hydraulics, Aug 2023, Washington, United States. pp.225-238. ⟨cea-04190863⟩
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