流动沸腾的格子Boltzmann方法模拟

基金项目:

9140C7101020802)

中国核动力研究设计院重点实验室基金(9140C710901090C71

国家自然科学基金资助项目(51076172)

Numerical Simulation of Multiphase Flow and Boiling using Lattice Boltzmann Method

1. Key Laboratory of Low-Grade Energy Utilization Technologies and Systems of Ministry of Education, Chongqing University, Chongqing 400030, China;
2. Key Laboratory of Renewable Energy and Gas Hydrate, Chinese Academy of Science, Guangzhou 510640, China;
3. CNN Key haboratory on Nuclear Reactor Thermal Hydraulics Technology, Nuclear Power Insititute of China, 610041, China

摘要: 采用新的描述气-液相变过程的格子Boltzmann理论模型对大空间和水平管内流动沸腾现象进行模拟。观察到气泡随时间的变化不断长大,并在浮力和流体运动作用力影响下脱离壁面,以及气泡在液相上升过程发生碰撞、聚合等现象。进一步研究重力对水平管内各种流型的影响及水平方向加速度对大空间流动沸腾的影响,验证了该模型对复杂相变问题模拟的可行性。
- 格子Boltzmann方法 /
- 相变 /
- 流动沸腾
Abstract: A new lattice Boltzmann method was used to simulate the multiphase flow and boiling in the pool and horizontal pipe in this peper.Numerical results showed the process of bubbles growing up and breaking away from the bottem with the effect of buoyancy and interaction force,and collision and aggregation can be found during the rising of bubbles.Also,the effect of horizontal acceleration on pool boiling was studied.The above results proved the ability of the present model to simulate the phase change problem.
- Lattice Boltzmann method /
- Phase change /
- Multiphase flow and Boiling