磁流体动力学条件下的气泡动力学：高密度比混合物的数值模拟和流动特性

IF 2 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Fusion Engineering and Design Pub Date : 2025-06-10 DOI:10.1016/j.fusengdes.2025.115215

Sonia Pignatiello, Simone Siriano, Alessandro Tassone

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引用次数: 0

摘要

许多增殖毯（BB）概念设想使用含有锂的液态金属（LM）合金通过氚增殖反应来实现生产氚的功能，该反应产生氦气作为副产物。在适当的条件下，这可以成核，聚集成气泡，可以在主要流体流动中运输。由于气泡可能积聚在系统的某些部分，因此必须研究磁流体动力学（MHD） LM流中的气泡传输，以评估对BB性能和安全性的影响。在本研究中，使用名为mhdInterFoam （mIF）的定制OpenFOAM求解器来检查MHD条件下气泡的动力学。该代码能够使用流体体积（VoF）方法模拟不可压缩、不混溶和等温流体的两相MHD流动。根据实验数据对代码进行了验证，在几种气泡直径（Eötvös数，Eo≈1.5 - 8.5）和磁场高达1.5 T（哈特曼数，Ha≈0 - 220）的情况下，产生的结果与参考文献一致。具体来说，分析了磁场对气泡运动状态的影响，并给出了气泡周围LM流动的特性。该研究考虑了基本物理量的分布，仅通过实验研究是具有挑战性的。

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查看原文本刊更多论文

Bubble dynamics in Magnetohydrodynamics conditions: Numerical simulation and flow characterization for high density ratio mixture

Many Breeding Blanket (BB) concepts envision the use of a liquid metal (LM) alloy containing lithium to fulfill the functions of tritium production through the tritium breeding reaction, which produces helium as a by-product. This, under appropriate conditions, can nucleate, aggregate into bubbles that can be transported within the main fluid flow. The study of the bubbles transport within the magnetohydrodynamic (MHD) LM flow is mandatory to assess the impact on the BB performance and safety, due to their potential accumulation in some part of the system.

In this study, the dynamics of bubbles in MHD conditions is examined using a custom OpenFOAM solver called mhdInterFoam (mIF). This code is capable of modeling a two-phase MHD flow of incompressible, immiscible, and isothermal fluids using the Volume of Fluid (VoF) method. The code has been validated against experimental data, producing results in good agreement with the reference for several bubble diameters (Eötvös number, Eo

\approx

1.5 - 8.5) and magnetic fields up to 1.5 T (Hartmann number, Ha

\approx

0 - 220).

Specifically, the magnetic field effects on the bubbles regime of motion are analyzed and the characteristics of the LM flow around the bubbles are presented. The study is performed considering the distribution of fundamental physical quantities, which are challenging to investigate through experimental studies alone.

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来源期刊

Fusion Engineering and Design 工程技术-核科学技术

CiteScore

3.50

自引率

23.50%

发文量

275

审稿时长

3.8 months

期刊介绍： The journal accepts papers about experiments (both plasma and technology), theory, models, methods, and designs in areas relating to technology, engineering, and applied science aspects of magnetic and inertial fusion energy. Specific areas of interest include: MFE and IFE design studies for experiments and reactors; fusion nuclear technologies and materials, including blankets and shields; analysis of reactor plasmas; plasma heating, fuelling, and vacuum systems; drivers, targets, and special technologies for IFE, controls and diagnostics; fuel cycle analysis and tritium reprocessing and handling; operations and remote maintenance of reactors; safety, decommissioning, and waste management; economic and environmental analysis of components and systems.