Numerical investigation on particles removal by bubble flotation in swirling flow

Numerical investigation on particles removal by bubble flotation in swirling flow
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旋流中气泡气浮去除颗粒的数值研究

DOI:
10.1007/s42243-022-00748-w
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发表时间:
2022-02
期刊:
Journal of Iron and Steel Research, International
影响因子:
--
通讯作者:
Tan Min
Tan Min
中科院分区:
其他
文献类型:
--
作者:
Cui Henan;Li Tao;Zhu Yulin;Tan Min

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颗粒的去除在废水处理、矿物分离、清洁金属生产等许多领域中具有重要意义。然而,大多数研究人员将注意力集中在涉及气液或固液的两相流上。采用离散相模型模拟了旋流三相流场中气泡与颗粒之间的运动和相互作用。通过编写用户自定义函数程序来控制旋流以及气泡与颗粒之间的碰撞。向心压力梯度力将离散相推向中心区域,颗粒与气泡之间的碰撞率大大提高。此外,事实证明,增加旋转速度有利于去除颗粒,特别是对于较大的颗粒。因此,气泡浮选是去除流体中颗粒的有效方法。优化了旋流速度,这对于工业设计具有重要价值。
The removal of particles is of great importance in many fields including effluent treatment, mineral separation, clean metal production, etc. However, most of the researchers paid their attention to the two-phase flow involving gas-liquid or solid-liquid independently. The motion and interaction between bubbles and particles in the swirling three-phase flow field were simulated by discrete phase model. The swirling flow and the collision between bubbles and particles were governed by compiling the user-defined function program. The centripetal pressure gradient force pushes the discrete phases toward the central region, where the collision rate between particle and bubbles is improved greatly. Moreover, it proved beneficially for particle removal to increase the swirling velocity, particularly for larger particles. Thus, bubble flotation is an effective method to remove particles from the fluid. The swirling velocity was optimized, which is valuable for industrial design.
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