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arXiv 2011.14569physics.flu-dynphysics.comp-ph
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流体体积框架中气泡-颗粒相互作用的数值模拟

Numerical modeling of bubble-particle interaction in a volume-of-fluid framework

Hojun Moon, Jeongbo Shim, Donghyun You

摘要:

本文提出了一种数值方法来模拟含气泡颗粒相互作用的气液固三相流动,包括颗粒碰撞、滑动和附着。气液两相流在欧拉框架下采用流体体积法进行模拟。粒子运动预测的拉格朗日框架。提出了碰撞检测和粒子滑动、附着判定的算法。一个有效的气泡被引入到模拟这些气泡-颗粒相互作用。所提出的数值方法是通过实验的情况下,需要一个单一的气泡与颗粒的上升进行验证。从模拟中获得的碰撞和附着概率进行比较,模型和实验结果的基础上的气泡直径,颗粒直径,和接触角。气泡附近的颗粒轨迹,显示与建议的气泡-颗粒相互作用模型的差异。利用该模型观察了碰撞粒子的滑动和附着过程。

英文摘要:

A numerical method is presented to simulate gas-liquid-solid flows with bubble-particle interaction, including particle collision, sliding, and attachment. Gas-liquid flows are simulated in an Eulerian framework using a volume-of-fluid method. Particle motions are predicted in a Lagrangian framework. Algorithms that are used to detect collision and determine the sliding or attachment of the particle are developed. An effective bubble is introduced to model these bubble-particle interaction. The proposed numerical method is validated through experimental cases that entail the rising of a single bubble with particles. Collision and attachment probabilities obtained from the simulation are compared to model and experimental results based on bubble diameters, particle diameters, and contact angles. The particle trajectories near the bubble are presented to show differences with and without the proposed bubble-particle interaction model. The sliding and attachment of the colliding particle are observed using this model.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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